⚠️ Warning: This is a draft ⚠️
This means it might contain formatting issues, incorrect code, conceptual problems, or other severe issues.
If you want to help to improve and eventually enable this page, please fork RosettaGit's repository and open a merge request on GitHub.
{{task}}
;Task:
Plot a function represented as x', y' numerical arrays.
Post the resulting image for the following input arrays (taken from [[Time_a_function#Python|Python's Example section on ''Time a function'']]): x = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; y = {2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0};
This task is intended as a subtask for [[Measure relative performance of sorting algorithms implementations]].
Ada
Like C, this is often outsourced to another program like gnuplot, but is also possible with GtkAda. {{libheader|GtkAda}} [[Image:Gtkada_plot.png|thumb|right|100px|Example GtkAda plot]]
with Gtk.Main;
with Gtk.Window; use Gtk.Window;
with Gtk.Widget; use Gtk.Widget;
with Gtk.Handlers; use Gtk.Handlers;
with Glib; use Glib;
with Gtk.Extra.Plot; use Gtk.Extra.Plot;
with Gtk.Extra.Plot_Data; use Gtk.Extra.Plot_Data;
with Gtk.Extra.Plot_Canvas; use Gtk.Extra.Plot_Canvas;
with Gtk.Extra.Plot_Canvas.Plot; use Gtk.Extra.Plot_Canvas.Plot;
procedure PlotCoords is
package Handler is new Callback (Gtk_Widget_Record);
Window : Gtk_Window;
Plot : Gtk_Plot;
PCP : Gtk_Plot_Canvas_Plot;
Canvas : Gtk_Plot_Canvas;
PlotData : Gtk_Plot_Data;
x, y, dx, dy : Gdouble_Array_Access;
procedure ExitMain (Object : access Gtk_Widget_Record'Class) is
begin
Destroy (Object); Gtk.Main.Main_Quit;
end ExitMain;
begin
x := new Gdouble_Array'(0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0);
y := new Gdouble_Array'(2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0);
Gtk.Main.Init;
Gtk_New (Window);
Set_Title (Window, "Plot coordinate pairs with GtkAda");
Gtk_New (PlotData);
Set_Points (PlotData, x, y, dx, dy);
Gtk_New (Plot);
Add_Data (Plot, PlotData);
Autoscale (Plot); Show (PlotData);
Hide_Legends (Plot);
Gtk_New (PCP, Plot); Show (Plot);
Gtk_New (Canvas, 500, 500); Show (Canvas);
Put_Child (Canvas, PCP, 0.15, 0.15, 0.85, 0.85);
Add (Window, Canvas);
Show_All (Window);
Handler.Connect (Window, "destroy",
Handler.To_Marshaller (ExitMain'Access));
Gtk.Main.Main;
end PlotCoords;
ALGOL 68
{{works with|ALGOL 68|Revision 1 - extensions to standard used - PRAGMA READ and Currying}} {{works with|ALGOL 68G|Any - tested with release [http://sourceforge.net/projects/algol68/files/algol68g/algol68g-2.4.1 algol68g-2.4.1].}} {{wont work with|ELLA ALGOL 68|Any (with appropriate job cards) - tested with release [http://sourceforge.net/projects/algol68/files/algol68toc/algol68toc-1.8.8d/algol68toc-1.8-8d.fc9.i386.rpm/download 1.8-8d] - due to extensive use of '''format'''[ted] ''transput''.}} [[Image:Plot_coordinate_pairs-Algol68.gif|thumb|right|100px|Example Algol68 plot]] '''File: Plot_coordinate_pairs.a68'''
#!/usr/bin/algol68g-full --script #
# -*- coding: utf-8 -*- #
PR READ "prelude/errata.a68" PR;
PR READ "prelude/exception.a68" PR;
PR READ "prelude/math_lib.a68" PR;
CO REQUIRED BY "prelude/graph_2d.a68" CO
MODE GREAL= REAL; # single precision #
FORMAT greal repr = $g(-3,0)$;
PR READ "prelude/graph_2d.a68" PR;
[]REAL x = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
[]REAL y = (2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0);
test:(
REF GRAPHDD test graph = INIT LOC GRAPHDD;
type OF window OF test graph := "gif"; # or gif, ps, X, pnm etc #
title OF test graph := "Plot coordinate pairs";
sub title OF test graph := "Algol68";
interval OF (axis OF test graph)[x axis] := (0, 8);
label OF (axis OF test graph)[x axis] := "X axis";
interval OF (axis OF test graph)[y axis] := (0, 200);
label OF (axis OF test graph)[y axis] := "Y axis";
PROC curve = (POINTYIELD yield)VOID:
FOR i TO UPB x DO yield((x[i],y[i])) OD;
(begin curve OF (METHODOF test graph))(~);
(add curve OF (METHODOF test graph))(curve, (red,solid));
(end curve OF (METHODOF test graph))(~)
);
PR READ "postlude/exception.a68" PR
AutoHotkey
[http://i.imgur.com/8LgE7FS.png Image] - Link, since uploads seem to be disabled currently. {{works with|AutoHotkey_L}}(AutoHotkey1.1+) {{libheader|GDIP}}
#SingleInstance, Force
#NoEnv
SetBatchLines, -1
OnExit, Exit
FileOut := A_Desktop "\MyNewFile.png"
Font := "Arial"
x := [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
y := [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0]
; Uncomment if Gdip.ahk is not in your standard library
; #Include, Gdip.ahk
if (!pToken := Gdip_Startup()) {
MsgBox, 48, Gdiplus error!, Gdiplus failed to start. Please ensure you have Gdiplus on your system.
ExitApp
}
If (!Gdip_FontFamilyCreate(Font)) {
MsgBox, 48, Font error!, The font you have specified does not exist on your system.
ExitApp
}
pBitmap := Gdip_CreateBitmap(900, 900)
, G := Gdip_GraphicsFromImage(pBitmap)
, Gdip_SetSmoothingMode(G, 4)
, pBrush := Gdip_BrushCreateSolid(0xff000000)
, Gdip_FillRectangle(G, pBrush, -3, -3, 906, 906)
, Gdip_DeleteBrush(pBrush)
, pPen1 := Gdip_CreatePen(0xffffcc00, 2)
, pPen2 := Gdip_CreatePen(0xffffffff, 2)
, pPen3 := Gdip_CreatePen(0xff447821, 1)
, pPen4 := Gdip_CreatePen(0xff0066ff, 2)
, Gdip_DrawLine(G, pPen2, 50, 50, 50, 850)
, Gdip_DrawLine(G, pPen2, 50, 850, 850, 850)
, FontOptions1 := "x0 y870 Right cbbffffff r4 s16 Bold"
, Gdip_TextToGraphics(G, 0, FontOptions1, Font, 40, 20)
Loop, % x.MaxIndex() - 1 {
Offset1 := 50 + (x[A_Index] * 80)
, Offset2 := Offset1 + 80
, Gdip_DrawLine(G, pPen1, Offset1, 850 - (y[A_Index] * 4), Offset1 + 80, 850 - (y[A_Index + 1] * 4))
}
Loop, % x.MaxIndex() {
Offset1 := 50 + ((A_Index - 1) * 80)
, Offset2 := Offset1 + 80
, Offset3 := 45 + (x[A_Index] * 80)
, Offset4 := 845 - (y[A_Index] * 4)
, Gdip_DrawLine(G, pPen2, 45, Offset1, 55, Offset1)
, Gdip_DrawLine(G, pPen2, Offset2, 845, Offset2, 855)
, Gdip_DrawLine(G, pPen3, 50, Offset1, 850, Offset1)
, Gdip_DrawLine(G, pPen3, Offset2, 50, Offset2, 850)
, Gdip_DrawLine(G, pPen4, Offset3, Offset4, Offset3 + 10, Offset4 + 10)
, Gdip_DrawLine(G, pPen4, Offset3, Offset4 + 10, Offset3 + 10, Offset4)
, FontOptions1 := "x0 y" (Offset1 - 7) " Right cbbffffff r4 s16 Bold"
, FontOptions2 := "x" (Offset2 - 7) " y870 Left cbbffffff r4 s16 Bold"
, Gdip_TextToGraphics(G, 220 - (A_Index * 20), FontOptions1, Font, 40, 20)
, Gdip_TextToGraphics(G, A_Index, FontOptions2, Font, 40, 20)
}
Gdip_DeletePen(pPen1)
, Gdip_DeletePen(pPen2)
, Gdip_DeletePen(pPen3)
, Gdip_DeletePen(pPen4)
, Gdip_SaveBitmapToFile(pBitmap, FileOut)
, Gdip_DisposeImage(pBitmap)
, Gdip_DeleteGraphics(G)
Run, % FileOut
Exit:
Gdip_Shutdown(pToken)
ExitApp
BBC BASIC
{{works with|BBC BASIC for Windows}} [[Image:Coordinate_pair_bbc.gif|right]]
DIM x(9), y(9)
x() = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
y() = 2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0
ORIGIN 100,100
VDU 23,23,2;0;0;0;
VDU 5
FOR x = 1 TO 9
GCOL 7 : LINE 100*x,720,100*x,0
GCOL 0 : PLOT 0,-10,-4 : PRINT ; x ;
NEXT
FOR y = 20 TO 180 STEP 20
GCOL 7 : LINE 900,4*y,0,4*y
GCOL 0 : PLOT 0,-212,20 : PRINT y ;
NEXT
LINE 0,0,0,720
LINE 0,0,900,0
GCOL 4
FOR i% = 0 TO 9
IF i%=0 THEN
MOVE 100*x(i%),4*y(i%)
ELSE
DRAW 100*x(i%),4*y(i%)
ENDIF
NEXT
C
We could use the ''suite'' provided by [[:Category:Raster graphics operations|Raster graphics operations]], but those functions lack a facility to draw text.
{{libheader|libplot}}
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <plot.h>
#define NP 10
double x[NP] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
double y[NP] = {2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0};
void minmax(double *x, double *y,
double *minx, double *maxx,
double *miny, double *maxy, int n)
{
int i;
*minx = *maxx = x[0];
*miny = *maxy = y[0];
for(i=1; i < n; i++) {
if ( x[i] < *minx ) *minx = x[i];
if ( x[i] > *maxx ) *maxx = x[i];
if ( y[i] < *miny ) *miny = y[i];
if ( y[i] > *maxy ) *maxy = y[i];
}
}
/* likely we must play with this parameter to make the plot looks better
when using different set of data */
#define YLAB_HEIGHT_F 0.1
#define XLAB_WIDTH_F 0.2
#define XDIV (NP*1.0)
#define YDIV (NP*1.0)
#define EXTRA_W 0.01
#define EXTRA_H 0.01
#define DOTSCALE (1.0/150.0)
#define MAXLABLEN 32
#define PUSHSCALE(X,Y) pl_fscale((X),(Y))
#define POPSCALE(X,Y) pl_fscale(1.0/(X), 1.0/(Y))
#define FMOVESCALE(X,Y) pl_fmove((X)/sx, (Y)/sy)
int main()
{
int plotter, i;
double minx, miny, maxx, maxy;
double lx, ly;
double xticstep, yticstep, nx, ny;
double sx, sy;
char labs[MAXLABLEN+1];
plotter = pl_newpl("png", NULL, stdout, NULL);
if ( plotter < 0 ) exit(1);
pl_selectpl(plotter);
if ( pl_openpl() < 0 ) exit(1);
/* determines minx, miny, maxx, maxy */
minmax(x, y, &minx, &maxx, &miny, &maxy, NP);
lx = maxx - minx;
ly = maxy - miny;
pl_fspace(floor(minx) - XLAB_WIDTH_F * lx, floor(miny) - YLAB_HEIGHT_F * ly,
ceil(maxx) + EXTRA_W * lx, ceil(maxy) + EXTRA_H * ly);
/* compute x,y-ticstep */
xticstep = (ceil(maxx) - floor(minx)) / XDIV;
yticstep = (ceil(maxy) - floor(miny)) / YDIV;
pl_flinewidth(0.25);
/* compute scale factors to adjust aspect */
if ( lx < ly ) {
sx = lx/ly;
sy = 1.0;
} else {
sx = 1.0;
sy = ly/lx;
}
pl_erase();
/* a frame... */
pl_fbox(floor(minx), floor(miny),
ceil(maxx), ceil(maxy));
/* labels and "tics" */
pl_fontname("HersheySerif");
for(ny=floor(miny); ny < ceil(maxy); ny += yticstep) {
pl_fline(floor(minx), ny, ceil(maxx), ny);
snprintf(labs, MAXLABLEN, "%6.2lf", ny);
FMOVESCALE(floor(minx) - XLAB_WIDTH_F * lx, ny);
PUSHSCALE(sx,sy);
pl_label(labs);
POPSCALE(sx,sy);
}
for(nx=floor(minx); nx < ceil(maxx); nx += xticstep) {
pl_fline(nx, floor(miny), nx, ceil(maxy));
snprintf(labs, MAXLABLEN, "%6.2lf", nx);
FMOVESCALE(nx, floor(miny));
PUSHSCALE(sx,sy);
pl_ftextangle(-90);
pl_alabel('l', 'b', labs);
POPSCALE(sx,sy);
}
/* plot data "point" */
pl_fillcolorname("red");
pl_filltype(1);
for(i=0; i < NP; i++)
{
pl_fbox(x[i] - lx * DOTSCALE, y[i] - ly * DOTSCALE,
x[i] + lx * DOTSCALE, y[i] + ly * DOTSCALE);
}
pl_flushpl();
pl_closepl();
}
No one would use the previous code to produce a plot (that looks [http://i40.tinypic.com/f2t0l0.png this way]; instead, normally we produce data through a program, then we plot the data using e.g. [[Plot x, y arrays#gnuplot|gnuplot]] or other powerful tools; the result (with gnuplot and without enhancement) could look [http://i41.tinypic.com/2qivbsn.png like this] instead.
Writing EPS
[[File:plot-2d-c.png|center]]Following code creates a plot in EPS format, with auto scaling and line/symbol/color controls. Plotting function loosely follows Matlab command style. Not thorough by any means, just to give an idea on how this kind of things can be coded.
#include <stdio.h>
#include <math.h>
#include <string.h>
#define N 40
double x[N], y[N];
void minmax(double x[], int len, double *base, double *step, int *nstep)
{
int i;
double diff, minv, maxv;
*step = 1;
minv = maxv = x[0];
for (i = 1; i < len; i++) {
if (minv > x[i]) minv = x[i];
if (maxv < x[i]) maxv = x[i];
}
if (minv == maxv) {
minv = floor(minv);
maxv = ceil(maxv);
if (minv == maxv) {
minv--;
maxv++;
}
} else {
diff = maxv - minv;
while (*step < diff) *step *= 10;
while (*step > diff) *step /= 10;
if (*step > diff / 2) *step /= 5;
else if (*step > diff / 5) *step /= 2;
}
*base = floor(minv / *step) * *step;
*nstep = ceil(maxv / *step) - floor(minv / *step);
}
/* writes an eps with 400 x 300 dimention, using 12 pt font */
#define CHARH 12
#define CHARW 6
#define DIMX 398
#define DIMY (300 - CHARH)
#define BOTY 20.
int plot(double x[], double y[], int len, char *spec)
{
int nx, ny, i;
double sx, sy, x0, y0;
char buf[100];
int dx, dy, lx, ly;
double ofs_x, ofs_y, grid_x;
minmax(x, len, &x0, &sx, &nx);
minmax(y, len, &y0, &sy, &ny);
dx = -log10(sx);
dy = -log10(sy);
ly = 0;
for (i = 0; i <= ny; i++) {
sprintf(buf, "%g\n", y0 + i * sy);
if (strlen(buf) > ly) ly = strlen(buf);
}
ofs_x = ly * CHARW;
printf("%%!PS-Adobe-3.0\n%%%%BoundingBox: 0 0 400 300\n"
"/TimesRoman findfont %d scalefont setfont\n"
"/rl{rlineto}def /l{lineto}def /s{setrgbcolor}def "
"/rm{rmoveto}def /m{moveto}def /st{stroke}def\n",
CHARH);
for (i = 0; i <= ny; i++) {
ofs_y = BOTY + (DIMY - BOTY) / ny * i;
printf("0 %g m (%*.*f) show\n",
ofs_y - 4, ly, dy, y0 + i * sy);
if (i) printf("%g %g m 7 0 rl st\n",
ofs_x, ofs_y);
}
printf("%g %g m %g %g l st\n", ofs_x, BOTY, ofs_x, ofs_y);
for (i = 0; i <= nx; i++) {
sprintf(buf, "%g", x0 + i * sx);
lx = strlen(buf);
grid_x = ofs_x + (DIMX - ofs_x) / nx * i;
printf("%g %g m (%s) show\n", grid_x - CHARW * lx / 2,
BOTY - 12, buf);
if (i) printf("%g %g m 0 7 rl st\n", grid_x, BOTY);
}
printf("%g %g m %g %g l st\n", ofs_x, BOTY, grid_x, BOTY);
if (strchr(spec, 'r')) printf("1 0 0 s\n");
else if (strchr(spec, 'b')) printf("0 0 1 s\n");
else if (strchr(spec, 'g')) printf("0 1 0 s\n");
else if (strchr(spec, 'm')) printf("1 0 1 s\n");
if (strchr(spec, 'o'))
printf("/o { m 0 3 rm 3 -3 rl -3 -3 rl -3 3 rl closepath st} def "
".5 setlinewidth\n");
if (strchr(spec, '-')) {
for (i = 0; i < len; i++) {
printf("%g %g %s ",
(x[i] - x0) / (sx * nx) * (DIMX - ofs_x) + ofs_x,
(y[i] - y0) / (sy * ny) * (DIMY - BOTY) + BOTY,
i ? "l" : "m");
}
printf("st\n");
}
if (strchr(spec, 'o'))
for (i = 0; i < len; i++) {
printf("%g %g o ",
(x[i] - x0) / (sx * nx) * (DIMX - ofs_x) + ofs_x,
(y[i] - y0) / (sy * ny) * (DIMY - BOTY) + BOTY);
}
printf("showpage\n%%EOF");
return 0;
}
int main()
{
int i;
for (i = 0; i < N; i++) {
x[i] = (double)i / N * 3.14159 * 6;
y[i] = -1337 + (exp(x[i] / 10) + cos(x[i])) / 100;
}
/* string parts: any of "rgbm": color; "-": draw line; "o": draw symbol */
plot(x, y, N, "r-o");
return 0;
}
C++
[[File:plot_cpp.png|300px]]
#include <windows.h>
#include <string>
#include <vector>
//--------------------------------------------------------------------------------------------------
using namespace std;
//--------------------------------------------------------------------------------------------------
const int HSTEP = 46, MWID = 40, MHEI = 471;
const float VSTEP = 2.3f;
//--------------------------------------------------------------------------------------------------
class vector2
{
public:
vector2() { x = y = 0; }
vector2( float a, float b ) { x = a; y = b; }
void set( float a, float b ) { x = a; y = b; }
float x, y;
};
//--------------------------------------------------------------------------------------------------
class myBitmap
{
public:
myBitmap() : pen( NULL ), brush( NULL ), clr( 0 ), wid( 1 ) {}
~myBitmap()
{
DeleteObject( pen );
DeleteObject( brush );
DeleteDC( hdc );
DeleteObject( bmp );
}
bool create( int w, int h )
{
BITMAPINFO bi;
ZeroMemory( &bi, sizeof( bi ) );
bi.bmiHeader.biSize = sizeof( bi.bmiHeader );
bi.bmiHeader.biBitCount = sizeof( DWORD ) * 8;
bi.bmiHeader.biCompression = BI_RGB;
bi.bmiHeader.biPlanes = 1;
bi.bmiHeader.biWidth = w;
bi.bmiHeader.biHeight = -h;
HDC dc = GetDC( GetConsoleWindow() );
bmp = CreateDIBSection( dc, &bi, DIB_RGB_COLORS, &pBits, NULL, 0 );
if( !bmp ) return false;
hdc = CreateCompatibleDC( dc );
SelectObject( hdc, bmp );
ReleaseDC( GetConsoleWindow(), dc );
width = w; height = h;
return true;
}
void clear( BYTE clr = 0 )
{
memset( pBits, clr, width * height * sizeof( DWORD ) );
}
void setBrushColor( DWORD bClr )
{
if( brush ) DeleteObject( brush );
brush = CreateSolidBrush( bClr );
SelectObject( hdc, brush );
}
void setPenColor( DWORD c ) { clr = c; createPen(); }
void setPenWidth( int w ) { wid = w; createPen(); }
void saveBitmap( string path )
{
BITMAPFILEHEADER fileheader;
BITMAPINFO infoheader;
BITMAP bitmap;
DWORD wb;
GetObject( bmp, sizeof( bitmap ), &bitmap );
DWORD* dwpBits = new DWORD[bitmap.bmWidth * bitmap.bmHeight];
ZeroMemory( dwpBits, bitmap.bmWidth * bitmap.bmHeight * sizeof( DWORD ) );
ZeroMemory( &infoheader, sizeof( BITMAPINFO ) );
ZeroMemory( &fileheader, sizeof( BITMAPFILEHEADER ) );
infoheader.bmiHeader.biBitCount = sizeof( DWORD ) * 8;
infoheader.bmiHeader.biCompression = BI_RGB;
infoheader.bmiHeader.biPlanes = 1;
infoheader.bmiHeader.biSize = sizeof( infoheader.bmiHeader );
infoheader.bmiHeader.biHeight = bitmap.bmHeight;
infoheader.bmiHeader.biWidth = bitmap.bmWidth;
infoheader.bmiHeader.biSizeImage = bitmap.bmWidth * bitmap.bmHeight * sizeof( DWORD );
fileheader.bfType = 0x4D42;
fileheader.bfOffBits = sizeof( infoheader.bmiHeader ) + sizeof( BITMAPFILEHEADER );
fileheader.bfSize = fileheader.bfOffBits + infoheader.bmiHeader.biSizeImage;
GetDIBits( hdc, bmp, 0, height, ( LPVOID )dwpBits, &infoheader, DIB_RGB_COLORS );
HANDLE file = CreateFile( path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
WriteFile( file, &fileheader, sizeof( BITMAPFILEHEADER ), &wb, NULL );
WriteFile( file, &infoheader.bmiHeader, sizeof( infoheader.bmiHeader ), &wb, NULL );
WriteFile( file, dwpBits, bitmap.bmWidth * bitmap.bmHeight * 4, &wb, NULL );
CloseHandle( file );
delete [] dwpBits;
}
HDC getDC() const { return hdc; }
int getWidth() const { return width; }
int getHeight() const { return height; }
private:
void createPen()
{
if( pen ) DeleteObject( pen );
pen = CreatePen( PS_SOLID, wid, clr );
SelectObject( hdc, pen );
}
HBITMAP bmp;
HDC hdc;
HPEN pen;
HBRUSH brush;
void *pBits;
int width, height, wid;
DWORD clr;
};
//--------------------------------------------------------------------------------------------------
class plot
{
public:
plot() { bmp.create( 512, 512 ); }
void draw( vector<vector2>* pairs )
{
bmp.clear( 0xff );
drawGraph( pairs );
plotIt( pairs );
HDC dc = GetDC( GetConsoleWindow() );
BitBlt( dc, 0, 30, 512, 512, bmp.getDC(), 0, 0, SRCCOPY );
ReleaseDC( GetConsoleWindow(), dc );
//bmp.saveBitmap( "f:\\rc\\plot.bmp" );
}
private:
void drawGraph( vector<vector2>* pairs )
{
HDC dc = bmp.getDC();
bmp.setPenColor( RGB( 240, 240, 240 ) );
DWORD b = 11, c = 40, x;
RECT rc; char txt[8];
for( x = 0; x < pairs->size(); x++ )
{
MoveToEx( dc, 40, b, NULL ); LineTo( dc, 500, b );
MoveToEx( dc, c, 11, NULL ); LineTo( dc, c, 471 );
wsprintf( txt, "%d", ( pairs->size() - x ) * 20 );
SetRect( &rc, 0, b - 9, 36, b + 11 );
DrawText( dc, txt, lstrlen( txt ), &rc, DT_RIGHT | DT_VCENTER | DT_SINGLELINE );
wsprintf( txt, "%d", x );
SetRect( &rc, c - 8, 472, c + 8, 492 );
DrawText( dc, txt, lstrlen( txt ), &rc, DT_CENTER | DT_VCENTER | DT_SINGLELINE );
c += 46; b += 46;
}
SetRect( &rc, 0, b - 9, 36, b + 11 );
DrawText( dc, "0", 1, &rc, DT_RIGHT | DT_VCENTER | DT_SINGLELINE );
bmp.setPenColor( 0 ); bmp.setPenWidth( 3 );
MoveToEx( dc, 40, 11, NULL ); LineTo( dc, 40, 471 );
MoveToEx( dc, 40, 471, NULL ); LineTo( dc, 500, 471 );
}
void plotIt( vector<vector2>* pairs )
{
HDC dc = bmp.getDC();
HBRUSH br = CreateSolidBrush( 255 );
RECT rc;
bmp.setPenColor( 255 ); bmp.setPenWidth( 2 );
vector<vector2>::iterator it = pairs->begin();
int a = MWID + HSTEP * static_cast<int>( ( *it ).x ), b = MHEI - static_cast<int>( VSTEP * ( *it ).y );
MoveToEx( dc, a, b, NULL );
SetRect( &rc, a - 3, b - 3, a + 3, b + 3 ); FillRect( dc, &rc, br );
it++;
for( ; it < pairs->end(); it++ )
{
a = MWID + HSTEP * static_cast<int>( ( *it ).x );
b = MHEI - static_cast<int>( VSTEP * ( *it ).y );
SetRect( &rc, a - 3, b - 3, a + 3, b + 3 );
FillRect( dc, &rc, br ); LineTo( dc, a, b );
}
DeleteObject( br );
}
myBitmap bmp;
};
//--------------------------------------------------------------------------------------------------
int main( int argc, char* argv[] )
{
ShowWindow( GetConsoleWindow(), SW_MAXIMIZE );
plot pt;
vector<vector2> pairs;
pairs.push_back( vector2( 0, 2.7f ) ); pairs.push_back( vector2( 1, 2.8f ) );
pairs.push_back( vector2( 2.0f, 31.4f ) ); pairs.push_back( vector2( 3.0f, 38.1f ) );
pairs.push_back( vector2( 4.0f, 58.0f ) ); pairs.push_back( vector2( 5.0f, 76.2f ) );
pairs.push_back( vector2( 6.0f, 100.5f ) ); pairs.push_back( vector2( 7.0f, 130.0f ) );
pairs.push_back( vector2( 8.0f, 149.3f ) ); pairs.push_back( vector2( 9.0f, 180.0f ) );
pt.draw( &pairs );
system( "pause" );
return 0;
}
//--------------------------------------------------------------------------------------------------
Clojure
{{libheader|incanter}}
(use '(incanter core stats charts))
(def x (range 0 10))
(def y '(2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0))
(view (xy-plot x y))
{{Out}} [http://i.imgur.com/0RQaxNl.png]
EchoLisp
Resulting image [http://www.echolalie.org/echolisp/images/plot-coordinates.png here].
(lib 'plot)
(define ys #(2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0) )
(define (f n) [ys n])
(plot-sequence f 9)
→ (("x:auto" 0 9) ("y:auto" 2 198))
(plot-grid 1 20)
(plot-text " Rosetta plot coordinate pairs" 0 10 "white")
Erlang
Using [https://github.com/psyeugenic/eplot Eplot] to produce PNG.
-module( plot_coordinate_pairs ).
-export( [task/0, to_png_file/3] ).
task() ->
Xs = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
Ys = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0],
File = "plot_coordinate_pairs",
to_png_file( File, Xs, Ys ).
to_png_file( File, Xs, Ys ) ->
PNG = egd_chart:graph( [{File, lists:zip(Xs, Ys)}] ),
file:write_file( File ++ ".png", PNG ).
The result looks like [https://github.com/ebengt/rosettacode/blob/master/graphs/plot_coordinate_pairs.png this].
=={{header|F Sharp|F#}}== Using the [http://www.ffconsultancy.com/products/fsharp_for_visualization/ F# for Visualization] library: [[Image:FSViz.png|300px|thumb|right|alt text]]
#r @"C:\Program Files\FlyingFrog\FSharpForVisualization.dll"
let x = Seq.map float [|0; 1; 2; 3; 4; 5; 6; 7; 8; 9|]
let y = [|2.7; 2.8; 31.4; 38.1; 58.0; 76.2; 100.5; 130.0; 149.3; 180.0|]
open FlyingFrog.Graphics
Plot([Data(Seq.zip x y)], (0.0, 9.0))
=={{header|Fōrmulæ}}==
In [https://wiki.formulae.org/Plot_coordinate_pairs this] page you can see the solution of this task.
Fōrmulæ programs are not textual, visualization/edition of programs is done showing/manipulating structures but not text ([http://wiki.formulae.org/Editing_F%C5%8Drmul%C3%A6_expressions more info]). Moreover, there can be multiple visual representations of the same program. Even though it is possible to have textual representation —i.e. XML, JSON— they are intended for transportation effects more than visualization and edition.
The option to show Fōrmulæ programs and their results is showing images. Unfortunately images cannot be uploaded in Rosetta Code.
gnuplot
[[Image:Plotxy-gnuplot.png|thumb|right|200px|Example gnuplot output]]
unset key # Only one data set, so the key is uninformative
plot '-' # '-' can be replaced with a filename, to read data from that file.
0 2.7
1 2.8
2 31.4
3 38.1
4 68.0
5 76.2
6 100.5
7 130.0
8 149.3
9 180.0
e
Go
gnuplot
Output is the same as for the gnuplot example on this page.
A program can of course supply commands and data to gnuplot as prepared files. For the spirit of controlling plotting with the native language however, this example shows how commands and data can be prepared programatically and supplied to gnuplot through stdin.
package main
import (
"fmt"
"log"
"os/exec"
)
var (
x = []int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
y = []float64{2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0}
)
func main() {
g := exec.Command("gnuplot", "-persist")
w, err := g.StdinPipe()
if err != nil {
log.Fatal(err)
}
if err = g.Start(); err != nil {
log.Fatal(err)
}
fmt.Fprintln(w, "unset key; plot '-'")
for i, xi := range x {
fmt.Fprintf(w, "%d %f\n", xi, y[i])
}
fmt.Fprintln(w, "e")
w.Close()
g.Wait()
}
gonum/plot
{{libheader|gonum/plot}} [[File:GoPoints.png|right|Go plot]]
package main
import (
"log"
"github.com/gonum/plot"
"github.com/gonum/plot/plotter"
"github.com/gonum/plot/plotutil"
"github.com/gonum/plot/vg"
)
var (
x = []int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
y = []float64{2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0}
)
func main() {
pts := make(plotter.XYs, len(x))
for i, xi := range x {
pts[i] = struct{ X, Y float64 }{float64(xi), y[i]}
}
p, err := plot.New()
if err != nil {
log.Fatal(err)
}
if err = plotutil.AddScatters(p, pts); err != nil {
log.Fatal(err)
}
if err := p.Save(3*vg.Inch, 3*vg.Inch, "points.svg"); err != nil {
log.Fatal(err)
}
}
Groovy
Using JFreeChart and Groovy Swing Builder [[File:GroovyPlotDemo.png|300px|thumb|right|Screenshot of groovy solution]]
import groovy.swing.SwingBuilder
import javax.swing.JFrame
import org.jfree.chart.ChartFactory
import org.jfree.chart.ChartPanel
import org.jfree.data.xy.XYSeries
import org.jfree.data.xy.XYSeriesCollection
import org.jfree.chart.plot.PlotOrientation
def chart = {
x = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
y = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0]
def series = new XYSeries('plots')
[x, y].transpose().each { x, y -> series.add x, y }
def labels = ["Plot Demo", "X", "Y"]
def data = new XYSeriesCollection(series)
def options = [false, true, false]
def chart = ChartFactory.createXYLineChart(*labels, data, PlotOrientation.VERTICAL, *options)
new ChartPanel(chart)
}
new SwingBuilder().edt {
frame(title:'Plot coordinate pairs', defaultCloseOperation:JFrame.EXIT_ON_CLOSE, pack:true, show:true) {
widget(chart())
}
}
Haskell
gnuplot is a package from [http://hackage.haskell.org/packages/hackage.html HackageDB].
import Graphics.Gnuplot.Simple
pnts = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0]
doPlot = plotPathStyle [ ( Title "plotting dots" )]
(PlotStyle Points (CustomStyle [])) (zip [0..] pnts)
HicEst
REAL :: n=10, x(n), y(n)
x = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
y = (2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0)
WINDOW(WINdowhandle=wh, Width=-300, Height=-300, X=1, TItle='Rosetta')
AXIS(WINdowhandle=wh, Title='x values', Yaxis, Title='y values')
LINE(X=x, Y=y, SymbolDiameter=2)
[[File:HicEst_plot_coordinate_pairs.png]]
=={{header|Icon}} and {{header|Unicon}}== [[File:Plotpoints-unicon.gif|thumb|right|Sample Output]]
link printf,numbers
procedure main()
x := [0., 1., 2., 3., 4., 5., 6., 7., 8., 9.]
y := [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0]
Plot(x,y,600,400)
end
$define POINTR 2 # Point Radius
$define POINTC "red" # Point Colour
$define GRIDC "grey" # grid colour
$define AXISC "black" # axis/label colour
$define BORDER 60 # per side border
$define TICKS 5. # grid ticks per axis
$define AXISFH 20 # font height for axis labels
procedure Plot(x,y,cw,ch)
/cw := 700 # default dimensions
/ch := 400
uw := cw-BORDER*2 # usable dimensions
uh := ch-BORDER*2
wparms := ["Plot","g",
sprintf("size=%d,%d",cw,ch),
"bg=white"] # base window parms
dx := sprintf("dx=%d",BORDER) # grid origin
dy := sprintf("dy=%d",BORDER)
&window := open!wparms | stop("Unable to open window")
X := scale(x,uw) # scale data to usable space
Y := scale(y,uh,"invert")
WAttrib(dx,dy) # set origin=grid & draw grid
every x := (X.tickfrom to X.tickto by X.tick) * X.tickscale do {
if x = 0 then Fg(AXISC) else Fg(GRIDC)
DrawLine(x,Y.tickfrom*Y.tickscale,x,Y.tickto*Y.tickscale)
}
every y := (Y.tickfrom to Y.tickto by Y.tick) * Y.tickscale do {
if y = uh then Fg(AXISC) else Fg(GRIDC)
DrawLine(X.tickfrom*X.tickscale,y,X.tickto*X.tickscale,y)
}
Fg(POINTC) # draw data points ....
every i := 1 to *X.scaled do
FillCircle(X.scaled[i],Y.scaled[i],POINTR)
Fg(AXISC) # label grid
WAttrib(dx,"dy=0") # label X axis
Font(sprintf("Helvetica,%d",AXISFH))
ytxt := ch-BORDER+1+(WAttrib("ascent") - WAttrib("descent"))/2
every x := X.tickscale * (xv := X.tickfrom to X.tickto by X.tick) do
DrawString(x - TextWidth(xv)/2, ytxt + integer(AXISFH*1.5),xv)
WAttrib("dx=0",dy) # label Y axis
every y := Y.tickscale * (yv := Y.tickfrom to Y.tickto by Y.tick) do
DrawString(BORDER/2 - TextWidth(yv)/2, ytxt - BORDER - y,yv)
WriteImage(sprintf("PlotPoints-%d.gif",&now)) # save image
WAttrib("dx=0","dy=0") # close off nicely
Font("Helvetica,10")
DrawString(10,ch-5,"Right click to exit")
until Event() == &rpress # wait for left mouse button
close(&window)
end
record scaledata(low,high,range,pix,raw,scaled,tick,tickfrom,tickto,tickscale)
procedure scale(data,pix,opts[])
P :=scaledata( pmin := min!data, pmax := max!data,
prange := real(pmax-pmin), pix,
data,q :=[])
/ticks := TICKS
P.tick := ceil(prange/(10^(k:=floor(log(prange,10))))*(10^k)/ticks)
P.tickfrom := P.tick*floor(pmin/P.tick)
P.tickto := P.tick*ceil(pmax/P.tick)
P.tickscale := real(pix)/(P.tickto-P.tickfrom)
every put(q,integer((!data-P.tickfrom)*P.tickscale))
if !opts == "invert" then # invert is for y
every q[i := 1 to *q] := pix - q[i]
return P
end
{{libheader|Icon Programming Library}} [http://www.cs.arizona.edu/icon/library/src/procs/printf.icn printf.icn provides formatting] [http://www.cs.arizona.edu/icon/library/src/procs/numbers.icn numbers.icn provides floor,ceil]
J
{{libheader|plot}}
require 'plot'
X=: i.10
Y=: 2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0
'dot; pensize 2.4' plot X;Y
[http://www.jsoftware.com/jwiki/RosettaCode/ExamplePlot1 Output of plot.]
If you eliminate the left argument to plot, the dots will be connected instead of being isolated.
Java
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.JApplet;
import javax.swing.JFrame;
public class Plot2d extends JApplet {
double[] xi;
double[] yi;
public Plot2d(double[] x, double[] y) {
this.xi = x;
this.yi = y;
}
public static double max(double[] t) {
double maximum = t[0];
for (int i = 1; i < t.length; i++) {
if (t[i] > maximum) {
maximum = t[i];
}
}
return maximum;
}
public static double min(double[] t) {
double minimum = t[0];
for (int i = 1; i < t.length; i++) {
if (t[i] < minimum) {
minimum = t[i];
}
}
return minimum;
}
public void init() {
setBackground(Color.white);
setForeground(Color.white);
}
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.setPaint(Color.black);
int x0 = 70;
int y0 = 10;
int xm = 670;
int ym = 410;
int xspan = xm - x0;
int yspan = ym - y0;
double xmax = max(xi);
double xmin = min(xi);
double ymax = max(yi);
double ymin = min(yi);
g2.draw(new Line2D.Double(x0, ym, xm, ym));
g2.draw(new Line2D.Double(x0, ym, x0, y0));
for (int j = 0; j < 5; j++) {
int interv = 4;
g2.drawString("" + (j * (xmax - xmin) / interv + xmin), j * xspan / interv + x0 - 10, ym + 20);
g2.drawString("" + (j * (ymax - ymin) / interv + ymin), x0 - 20 - (int) (9 * Math.log10(ymax)),
ym - j * yspan / interv + y0 - 5);
g2.draw(new Line2D.Double(j * xspan / interv + x0, ym, j * xspan / interv + x0, ym + 5));
g2.draw(new Line2D.Double(x0 - 5, j * yspan / interv + y0, x0, j * yspan / interv + y0));
}
for (int i = 0; i < xi.length; i++) {
int f = (int) ((xi[i] - xmin) * xspan / (xmax - xmin));
int h = (int) (((ymax - ymin) - (yi[i] - ymin)) * yspan / (ymax - ymin));
g2.drawString("o", x0 + f - 3, h + 14);
}
for (int i = 0; i < xi.length - 1; i++) {
int f = (int) ((xi[i] - xmin) * xspan / (xmax - xmin));
int f2 = (int) ((xi[i + 1] - xmin) * xspan / (xmax - xmin));
int h = (int) (((ymax - ymin) - (yi[i] - ymin)) * yspan / (ymax - ymin));
int h2 = (int) (((ymax - ymin) - (yi[i + 1] - ymin)) * yspan / (ymax - ymin));
g2.draw(new Line2D.Double(f + x0, h + y0, f2 + x0, h2 + y0));
}
}
public static void main(String args[]) {
JFrame f = new JFrame("ShapesDemo2D");
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
double[] r = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
double[] t = {2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.09};
JApplet applet = new Plot2d(r, t);
f.getContentPane().add("Center", applet);
applet.init();
f.pack();
f.setSize(new Dimension(720, 480));
f.show();
}
}
jq
Using R (non-interactive mode) {{works with|jq|1.4}}
jq is designed to interoperate with other tools, and in this section we illustrate how jq can be used with R in a simple pipeline: jq will produce a stream of CSV data that will be piped into R operating in non-interactive mode. Assuming the jq and R programs are respectively in plot.jq and plot.R, the pipeline would look like this:
jq -n -M -r -f plot.jq | R CMD BATCH plot.R
The above would produce the plot as a .pdf file.
'''plot.jq'''
# NOTE: This definition of transpose can be omitted
# if your version of jq includes transpose as a builtin.
#
# transpose a possibly jagged matrix, quickly;
# rows are padded with nulls so the result is always rectangular.
def transpose:
if . == [] then []
else . as $in
| (map(length) | max) as $max
| length as $length
| reduce range(0; $max) as $j
([]; . + [reduce range(0;$length) as $i ([]; . + [ $in[$i][$j] ] )] )
end;
def x: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
def y: [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0];
def plot(x;y): "A,B", ( [x,y] | transpose | map( @csv ) | .[]);
plot(x;y)
'''plot.R'''
mydata <- read.table( file("stdin"), header=TRUE, sep=",")
x = mydata$A # x-axis
y = mydata$B # y-axis
plot(x, y, # plot the variables
main="Scatterplot Example",
xlab="x-axis label", # x-axis label
ylab="y-axis label" ) # y-axis label
Julia
Using Plots library with PlotlyJS as backend:
using Plots
plotlyjs()
x = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
y = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0]
p = scatter(x, y)
savefig(p, "/tmp/testplot.png")
Kotlin
{{libheader|JFreeChart}} {{trans|Groovy}}
// Version 1.2.31
import org.jfree.chart.ChartFactory
import org.jfree.chart.ChartPanel
import org.jfree.data.xy.XYSeries
import org.jfree.data.xy.XYSeriesCollection
import org.jfree.chart.plot.PlotOrientation
import javax.swing.JFrame
import javax.swing.SwingUtilities
import java.awt.BorderLayout
fun main(args: Array<String>) {
val x = intArrayOf(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
val y = doubleArrayOf(
2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0
)
val series = XYSeries("plots")
(0 until x.size).forEach { series.add(x[it], y[it]) }
val labels = arrayOf("Plot Demo", "X", "Y")
val data = XYSeriesCollection(series)
val options = booleanArrayOf(false, true, false)
val orient = PlotOrientation.VERTICAL
val chart = ChartFactory.createXYLineChart(
labels[0], labels[1], labels[2], data, orient, options[0], options[1], options[2]
)
val chartPanel = ChartPanel(chart)
SwingUtilities.invokeLater {
val f = JFrame()
with(f) {
defaultCloseOperation = JFrame.EXIT_ON_CLOSE
add(chartPanel, BorderLayout.CENTER)
title = "Plot coordinate pairs"
isResizable = false
pack()
setLocationRelativeTo(null)
isVisible = true
}
}
}
{{out}}
Similar to Groovy entry.
Liberty BASIC
First version writes directly to LB's console window.
'Plotting coordinate pairs MainWin - Style
For i = 0 To 9
x(i) = i
Next i
y(0) = 2.7
y(1) = 2.8
y(2) = 31.4
y(3) = 38.1
y(4) = 58.0
y(5) = 76.2
y(6) = 100.5
y(7) = 130.0
y(8) = 149.3
y(9) = 180.0
Locate 4, 22
For i = 0 To 9
Locate ((i * 4) + 2), 22
Print i
Next i
For i = 0 To 20 Step 2
Locate 0, (21 - i)
Print (i * 10)
Next i
For i = 0 To 9
Locate (x(i) * 4) + 2, (21 - (y(i)/ 10))
Print "."
Next i
End
The second version uses the more typical graphic window approach, and is written to enable easy adaptation to other data sets.
nomainwin
DATA 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
DATA 2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0
For i = 0 To 9
READ tmp: x( i) = tmp
Next i
For i = 0 To 9
READ tmp: y( i) = tmp
Next i
'Plotting coordinate pairs
WindowHeight = 500
WindowWidth = 430
Open "Plot coordinate pairs" For Graphics_nsb_nf As #gwin
#gwin "trapclose [quit.gwin]"
#gwin "Color Black; Down"
'25, 418 is 0,0
global offsetX, offsetY, scaleX, scaleY
offsetX = 25: offsetY = 418
scaleX = 40: scaleY = 2
maxX = 9: maxY = 200
#gwin "line "; sx( maxX);" "; sy( 0);" "; sx( 0); " "; sy( 0)
#gwin "goto "; sx( 0); " "; sy( maxY)
For x = 0 To 9
#gwin "place ";sx(x);" ";sy(0)
#gwin "Go -18"
#gwin "|"; x
Next
#gwin "turn 90"
For y = 0 To 200 Step 20
#gwin "place ";sx(0);" ";sy(y)
#gwin "Go -5"
#gwin "place ";0;" ";sy(y)
#gwin "|"; y
Next
#gwin "size 3"
For i = 0 To 9
#gwin "set ";sx(x(i));" ";sy(y(i))
Next i
#gwin "Flush"
Wait
[quit.gwin]
Close #gwin
End
'x, y to screen x, y
function sx(x)
sx = offsetX +x*scaleX
end function
function sy(y)
sy = offsetY-y*scaleY 'y is inverted
end function
[http://www.diga.me.uk/PlotCoordPairs.gif LB screen]
M2000 Interpreter
Last statements used for copy the console screen to clipboard
Result image [https://4.bp.blogspot.com/-8XdIVaW79lU/W_iCUBmj92I/AAAAAAAAHbA/TxMl_P22yckQ1Wdi4zsu6k_QVNRZpqJCgCLcBGAs/s1600/graph222.png here]
Module Pairs {
\\ written in version 9.5 rev. 13
\\ use Gdi+ antialiasing (not work with Wine in Linux, but we get no error)
smooth on
Const center=2, right=3, left=1, blue=1, angle=0, dotline=3
Const size9pt=9, size11pt=11
Cls ,0 ' use current background color, set split screen from line 0
Cursor 0,3
Report center, "Coordinate pairs"
x = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
y = (2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0)
dx=scale.x/2/len(x)
dy=dx 'ratio 1:1
graH=dy*len(x)
Basex=scale.x/4
Basey=(scale.y+graH)/2
Move Basex, Basey
\\ draw use relative coordinates
Draw 0,-graH
\\ Step just move graphic cursor
Step 0, graH
Draw scale.x/2
Step -scale.x/2
\\ scX is 1, not used
max=Y#max()
\\ Auto scale for Y, using 0 for start of axis Y
scY=-graH/((max+5^log(max) ) div 100)/100
\\ make vertical axis using dots with numbers center per dx
j=1
For i=basex+dx to basex+dx*x#max() Step dx
Move i, basey
Step 0, twipsy*10
Legend format$("{0}",array(x,j)), "courier", size9pt, angle, center
Width 1, dotline { draw 0, -graH-twipsy*10,7}
j++
Next i
\\ the same for horizontal axis
HalfTextHeight=Size.y("1","courier", size9pt)/2
For i=basey-dy to basey-dy*x#max() Step dy
Move basex, i
Step -twipsx*10
Width 1, dotline { draw scale.x/2+twipsx*10,,7}
Move basex-100, i+HalfTextHeight
Legend format$("{0}",(i-basey)/scY), "courier", size9pt, angle, left
Next i
ex=each(x) : ey=each(y)
\\ start from first point. We use Draw to for absolute coordinates
Move array(x,0)*dx+Basex, array(y,0)*scy+Basey
While ex, ey {
Width 2 {
Draw to array(ex)*dx+Basex, array(ey)*scy+Basey, blue
}
}
\\ second pass for marks and labels
ex=each(x) : ey=each(y)
While ex, ey {
Move array(ex)*dx+Basex, array(ey)*scy+Basey
Step -75, -75
Pen 12 {draw 150: draw 0,150 : draw -150 : draw 0,-150}
Pen 13 {
Step 200, -200
Legend format$("({0}-{1})",array(ex),array(ey) ), "courier bold", size11pt, angle, right
}
}
\\ screenshot to clipboard
Screenshot$=""
Move 0,0
Copy scale.x, scale.y to Screenshot$
Clipboard Screenshot$
a$=key$
}
Pairs
Maple
x := Vector([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]):
y := Vector([2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0]):
plot(x,y,style="point");
Mathematica
x={0,1,2,3,4,5,6,7,8,9};
y={2.7,2.8,31.4,38.1,58.0,76.2,100.5,130.0,149.3,180.0};
ListPlot[{x, y} // Transpose]
{{out}} [http://i43.tinypic.com/2a689yw.png]
MATLAB
x = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
>> y = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0];
>> plot(x,y,'.-')
Maxima
(%i1) ".." (m, n) := makelist (i, i, m, n); infix ("..")$
(%i2) x: 0 .. 9$ y:[2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0]$
(%i3) plot2d(['discrete, x, y], [style, [points,5,1,1]], [gnuplot_term, png], [gnuplot_out_file, "qsort-range-10-9.png"])$
[http://img28.picoodle.com/img/img28/4/2/7/f_qsortrange1m_1b7f493.png qsort-range-10-9.png]
OCaml
#load "graphics.cma"
open Graphics
let round x = int_of_float (floor(x +. 0.5))
let x = [0; 1; 2; 3; 4; 5; 6; 7; 8; 9]
and y = [2.7; 2.8; 31.4; 38.1; 58.0; 76.2; 100.5; 130.0; 149.3; 180.0]
let () =
open_graph "";
List.iter2
(fun x y ->
(* scale to fit in the window *)
let _x = x * 30
and _y = round(y *. 2.0) in
plot _x _y)
x y;
ignore(wait_next_event [Key_pressed]);
close_graph();
;;
Using the [http://forge.ocamlcore.org/projects/archimedes/ Archimedes] library, one can write: [[Image:Archimedes.png|300px|thumb|right|Archimedes plot (graphics output).]]
module A = Archimedes
let y = [|2.7; 2.8; 31.4; 38.1; 58.0; 76.2; 100.5; 130.0; 149.3; 180.0|]
let () =
let vp = A.init [] in
A.Axes.box vp;
A.set_color vp A.Color.red;
A.Array.y vp y;
A.close vp
Octave
x = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
y = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0];
plot(x,y,"o");
pause;
Ol
; define input arrays
(define x '(0 1 2 3 4 5 6 7 8 9))
(define y '(2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0))
; render
(import (lib gl2))
(glOrtho 0 10 0 200 0 1)
(gl:set-renderer (lambda (mouse)
(glClear GL_COLOR_BUFFER_BIT)
(glColor3f 0 1 0)
(glBegin GL_LINE_STRIP)
(map glVertex2f x y)
(glEnd)))
PARI/GP
plothraw(vx, vy)
Perl
{{libheader|GD::Graph}}
use GD::Graph::points;
@data = (
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
[2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0],
);
$graph = GD::Graph::points->new(400, 300);
$gd = $graph->plot(\@data) or die $graph->error;
# Save as image.
$format = $graph->export_format;
open(OUF, ">qsort-range-10-9.$format");
binmode OUF;
print OUF $gd->$format();
close(OUF);
{{libheader|Imager}} {{libheader|Imager::Plot}}
use Imager;
use Imager::Plot;
@x = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
@y = (2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0);
$plot = Imager::Plot->new(
Width => 400,
Height => 300,
GlobalFont => 'PATH_TO_TTF_FONT',
);
$plot->AddDataSet(
X => \@x,
Y => \@y,
style => {
marker => {
size => 2,
symbol => 'circle',
color => Imager::Color->new('red'),
},
},
);
$img = Imager->new(
xsize => 500,
ysize => 400,
);
$img->box(filled => 1, color => 'white');
$plot->Render(Image => $img, Xoff => 50, Yoff => 350);
$img->write(file => 'qsort-range-10-9.png');
Perl 6
{{works with|Rakudo|2018.03}} Generate an SVG image file.
use SVG;
use SVG::Plot;
my @x = 0..9;
my @y = (2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0);
say SVG.serialize: SVG::Plot.new(
width => 512,
height => 512,
x => @x,
x-tick-step => { 1 },
min-y-axis => 0,
values => [@y,],
title => 'Coordinate Pairs',
).plot(:lines);
[[File:Coordinate-pairs-perl6.svg]]
Phix
{{libheader|pGUI}} Output same as BBC BASIC
--
-- demo\rosetta\Plot_coordinate_pairs.exw
--
include pGUI.e
Ihandle dlg, canvas
cdCanvas cddbuffer, cdcanvas
constant x = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
y = {2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0}
function redraw_cb(Ihandle /*ih*/, integer /*posx*/, integer /*posy*/)
integer {width, height} = IupGetIntInt(canvas, "DRAWSIZE")
atom cx,cy,nx,ny
atom {w,h} = {(width-60)/9,(height-60)/180}
cdCanvasActivate(cddbuffer)
cx = 30+x[1]*w
cy = 30+y[1]*h
for i=2 to length(x) do
cdCanvasSetForeground(cddbuffer, CD_BLACK)
nx = 30+(i-1)*w
ny = 30+(i-1)*20*h
{} = cdCanvasTextAlignment(cddbuffer, CD_NORTH)
cdCanvasText(cddbuffer, nx, 25, sprintf("%d",(i-1)))
{} = cdCanvasTextAlignment(cddbuffer, CD_EAST)
cdCanvasText(cddbuffer, 25, ny, sprintf("%3d",(i-1)*20))
cdCanvasSetForeground(cddbuffer, CD_GRAY)
cdCanvasLine(cddbuffer,30,ny,width-30,ny)
cdCanvasLine(cddbuffer,nx,30,nx,height-30)
cdCanvasSetForeground(cddbuffer, CD_BLUE)
nx = 30+floor(x[i]*w)
ny = 30+floor(y[i]*h)
cdCanvasLine(cddbuffer,cx,cy,nx,ny)
cx = nx
cy = ny
end for
cdCanvasSetForeground(cddbuffer, CD_BLACK)
cdCanvasLine(cddbuffer,30,30,width-30,30)
cdCanvasLine(cddbuffer,30,30,30,height-30)
cdCanvasFlush(cddbuffer)
return IUP_DEFAULT
end function
function map_cb(Ihandle ih)
cdcanvas = cdCreateCanvas(CD_IUP, ih)
cddbuffer = cdCreateCanvas(CD_DBUFFER, cdcanvas)
cdCanvasSetBackground(cddbuffer, CD_WHITE)
return IUP_DEFAULT
end function
function esc_close(Ihandle /*ih*/, atom c)
if c=K_ESC then return IUP_CLOSE end if
return IUP_CONTINUE
end function
procedure main()
IupOpen()
canvas = IupCanvas(NULL)
IupSetAttribute(canvas, "RASTERSIZE", "340x340") -- initial size
IupSetCallback(canvas, "MAP_CB", Icallback("map_cb"))
dlg = IupDialog(canvas)
IupSetAttribute(dlg, "TITLE", "Plot coordinate pairs")
IupSetCallback(dlg, "K_ANY", Icallback("esc_close"))
IupSetCallback(canvas, "ACTION", Icallback("redraw_cb"))
IupMap(dlg)
IupSetAttribute(canvas, "RASTERSIZE", NULL) -- release the minimum limitation
IupShowXY(dlg,IUP_CENTER,IUP_CENTER)
IupMainLoop()
IupClose()
end procedure
main()
PicoLisp
[[Image: Plotxy-picoLisp.png|thumb|right|200px|Example picoLisp output]]
(load "@lib/ps.l")
(scl 1)
(de plot (PsFile DX DY Lst)
(let (SX (length Lst) SY (apply max Lst) N 0 Val)
(out PsFile
(psHead (+ DX 20) (+ DY 40))
(font (9 . "Helvetica"))
(if (or (=0 SX) (=0 SY))
(window 60 12 DX DY
(font 24 ,"Not enough Data") )
(setq Lst # Build coordinates
(let X -1
(mapcar
'((Y)
(cons
(*/ (inc 'X) DX SX)
(- DY (*/ Y DY SY)) ) )
Lst ) ) )
(color 55 95 55 # Background color
(let (X (+ DX 40) Y (+ DY 40))
(poly T 0 0 X 0 X Y 0 Y 0 0) ) )
(window 20 20 DX DY # Plot coordinates
(poly NIL 0 0 0 DY (- DX 20) DY)
(color 76 24 24
(poly NIL (caar Lst) (cdar Lst) (cdr Lst)) ) )
(window 4 4 60 12 (ps (format SY *Scl)))
(for X SX
(window (+ 6 (*/ (dec X) DX SX)) (+ 24 DY) 30 12
(ps (format (dec X)) 0) ) ) )
(page) ) ) )
(plot "plot.ps" 300 200 (2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0))
(call 'display "plot.ps")
PostScript
/x [0 1 2 3 4 5 6 7 8 9] def
/y [2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0] def
/i 1 def
newpath
x 0 get y 0 get moveto
x length 1 sub{
x i get y i get lineto
/i i 1 add def
}repeat
stroke
PureBasic
Structure PlotData
x.i
y.f
EndStructure
Global i, x, y.f, max_x, max_y, min_x = #MAXLONG, min_y = Infinity()
Define count = (?serie_y - ?serie_x) / SizeOf(Integer) - 1
Global Dim MyData.PlotData(count)
Restore serie_x
For i = 0 To count
Read.i x
MyData(i)\x = x
If x > max_x: max_x = x: EndIf
If x < min_x: min_x = x: EndIf
Next
Restore serie_y
For i = 0 To count
Read.f y
MyData(i)\y = y
If y > max_y: max_y = y: EndIf
If y < min_y: min_y = y: EndIf
Next
Procedure UpdatePlot(Win, w, h)
Static gblm = 20, gtrm = 5 ;graph's bottom-left and top-right margin
Protected count = ArraySize(MyData())
If w > gblm And h > gblm And count > 0
SetWindowTitle(Win, "PureBasic Plot " + Str(w) + "x" + Str(h))
Protected gw = w - gblm, gh = h - gblm ;graph's width and height
Protected i, yf.f, xf.f
yf = (gh - gtrm) / max_y
xf = (gw - gtrm) / max_x
CreateImage(0, w, h)
Protected OutputID = ImageOutput(0)
StartDrawing(OutputID)
DrawingMode(#PB_2DDrawing_Transparent)
;- Draw grid
For i = 0 To count
y = gh - max_y * i / count * yf
LineXY(gblm, y, w - gtrm, y, $467E3E)
; Y-scale
DrawText(1, y - 5, RSet(StrD(i / count * max_y, 1), 5))
x = gblm + max_x * i / count * xf
y = gh
; X-Scale
LineXY(x, y, x, gtrm, $467E3E)
If i: DrawText(x - 5, y + 2, Str(i)): EndIf
Next
;- Draw curve
Protected ox = gblm, oy = gh, x, y
For i = 0 To count
x = gblm + MyData(i)\x * xf
y = gh - MyData(i)\y * yf
LineXY(ox, oy, x, y, $0133EE)
ox = x: oy = y
Next
StopDrawing()
ImageGadget(0, 0, 0, w, h, ImageID(0))
EndIf
EndProcedure
Define Win = OpenWindow(#PB_Any, 0, 0, 600, 400,"", #PB_Window_SystemMenu | #PB_Window_SizeGadget)
If Win
SmartWindowRefresh(Win, 1)
UpdatePlot(Win, WindowWidth(Win), WindowHeight(Win))
Repeat
Define event = WaitWindowEvent()
Select event
Case #PB_Event_SizeWindow
UpdatePlot(Win, WindowWidth(Win), WindowHeight(Win))
EndSelect
Until event = #PB_Event_CloseWindow
; Save the plot if the user wants to
If MessageRequester("Question", "Save it?", #PB_MessageRequester_YesNo) = #PB_MessageRequester_Yes
Define File$=SaveFileRequester("Save as", "PB.png", "PNG (*.png)|*.png", 0)
UsePNGImageEncoder()
SaveImage(0, File$, #PB_ImagePlugin_PNG)
EndIf
EndIf
DataSection
serie_x:
Data.i 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
serie_y:
Data.f 2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0
EndDataSection
[[File:PureBasic PlotData.png]]
Python
==={{libheader|matplotlib}}===
[[File:qsort-range-10-9.png|300px|thumb|right|matplotlib plot of x,y arrays]]
Interactive session:
x = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> y = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0]
>>> import pylab
>>> pylab.plot(x, y, 'bo')
>>> pylab.savefig('qsort-range-10-9.png')
See some other examples:
- [http://matplotlib.org/examples/pylab_examples/simple_plot.html simple plot]
- [http://matplotlib.org/examples/shapes_and_collections/scatter_demo.html scatter demo]
- [http://matplotlib.org/examples/ticks_and_spines/ticklabels_demo_rotation.html rotated ticklabels demo]
==={{libheader|VPython}}===
from visual import *
from visual.graph import *
plot1 = gdisplay( title='VPython Plot-Demo',
xtitle='x',
ytitle='y (click and drag mouse to see coordinates)',
foreground=color.black,
background=color.white,
x=0, y=0,
width=400, height=400,
xmin=0, xmax=10,
ymin=0, ymax=200 )
f1 = gdots(color=color.red) # create plot-object
f1.plot(pos= (0, 2.7), color=color.blue ) # add a single point
f1.plot(pos=[(1, 2.8), # add a list of points
(2, 31.4),
(3, 38.1),
(4, 58.0),
(5, 76.2),
(6, 100.5),
(7, 130.0),
(8, 149.3),
(9, 180.0) ]
)
label(display=plot1.display, text="Look here",
pos=(6,100.5), xoffset=30,yoffset=-20 )
R
R has several different plotting paradigms. First we define the data.
x <- c(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
y <- c(2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0)
Base graphics
plot(x,y)
Lattice/grid graphics
{{libheader|lattice}}
library(lattice)
xyplot(y~x)
Grammar of graphics
{{libheader|ggplot2}}
library(ggplot2)
qplot(x,y)
Racket
Racket has a built-in plotting library
#lang racket
(require plot)
(define x (build-list 10 values))
(define y (list 2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0))
(plot-new-window? #t)
(plot (points (map vector x y)))
This opens a new window with this image (with interactive zooming) [[File:PointsRacket.png]]
And this
#lang racket
(require plot)
(define x (build-list 10 values))
(define y (list 2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0))
(plot-new-window? #t)
(plot (lines (map vector x y)))
opens a new window with this image [[File:LinesRacket.png]]
REXX
See [[Plot coordinate pairs/REXX]] for the '''$PLOT''' program.
without point labels
Example usage:
/*REXX program plots X,Y coördinate pairs of numbers with plain (ASCII) characters.*/
x = 0 1 2 3 4 5 6 7 8 9
y = 2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0
$=
do j=1 for words(x) /*build a list suitable for $PLOT subr.*/
$=$ word(x, j)','word(y, j) /*add this X,Y coördinate to the $ list*/
end /*j*/ /*$≡ 0,2.7 1,2.8 2,31.4 3,38.1 ··· */
call '$PLOT' $ /*invoke the REXX program: $PLOT */
exit rc /*stick a fork in it, we're all done. */
{{out|output|text= when using the default input:}}
│180 ∙
│
│
│
│
│
│
│
│ ∙
│
│
│
│
│ ∙
│
│
│
│
│
│
│ ∙
│
│
│
│
│
│
│ ∙
│
│
│
│ ∙
│
│
│
│
│ ∙
│
│ ∙
│
│
│
│
│
│
∙0 ∙ 9
└──────────────────────────────────────────────────────────────────────────────
with point labels
/*REXX program plots X,Y coördinate pairs of numbers with plain (ASCII) characters.*/
x = 0 1 2 3 4 5 6 7 8 9
y = 2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0
$=
do j=1 for words(x) /*build a list suitable for $PLOT subr.*/
$=$ word(x, j)','word(y, j) /*add this X,Y coördinate to the $ list*/
end /*j*/ /*$≡ 0,2.7 1,2.8 2,31.4 3,38.1 ··· */
call '$PLOT' $ '(LABELDatapoints' /*invoke the REXX program: $PLOT */
exit rc /*stick a fork in it, we're all done. */
{{out|output|text= when using the default input:}}
│180 (9,180)∙
│
│
│
│
│
│
│
│
│
│ ∙(8,149.3)
│
│
│
│
│
│ ∙(7,130)
│
│
│
│
│
│
│
│
│
│ ∙(6,100.5)
│
│
│
│
│
│
│ ∙(5,76.2)
│
│
│
│
│
│ ∙(4,58)
│
│
│
│
│
│
│ ∙(3,38.1)
│
│ ∙(2,31.4)
│
│
│
│
│
│
│
│
∙(0,2.7) ∙(1,2.8)
└──────────────────────────────────────────────────────────────────────────────────────────────
Ring
# Project : Plot coordinate pairs
load "guilib.ring"
paint = null
new qapp
{
win1 = new qwidget() {
setwindowtitle("Plot coordinate pairs")
setgeometry(100,100,1024,900)
label1 = new qlabel(win1) {
setgeometry(10,10,1024,900)
settext("")
}
new qpushbutton(win1) {
setgeometry(50,50,100,30)
settext("draw")
setclickevent("draw()")
}
show()
}
exec()
}
func draw
p1 = new qpicture()
color = new qcolor() {
setrgb(0,0,255,255)
}
pen = new qpen() {
setcolor(color)
setwidth(1)
}
paint = new qpainter() {
begin(p1)
setpen(pen)
old = 0
yold = 0
xnew = 0
ynew = 0
x2 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
y2 = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0]
for x = 1 to 9
drawline(100*x,720,100*x,0)
drawtext(100*x,750,string(x))
next
for y = 20 to 180 step 20
drawline(900,4*y,0,4*y)
drawtext(0,720-4*y,string(y))
next
drawline(0,0,0,720)
drawline(0,0,900,0)
for i = 1 to 10
if i=1
xold = 100*x2[i]
yold = 720-4*y2[i]
else
xnew = 100*x2[i]
ynew = 720-4*y2[i]
drawline(xold,yold,xnew,ynew)
xold = xnew
yold = ynew
ok
next
endpaint()
}
label1 { setpicture(p1) show() }
return
Output:
https://www.dropbox.com/s/q6tra0cqoty4pya/Plot.jpg?dl=0
Ruby
{{libheader|rgplot}}
[[File:Ruby.plotxy.png|300px|thumb|right|gnuplot of x,y arrays]]
require 'gnuplot'
x = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
y = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0]
Gnuplot.open do |gp|
Gnuplot::Plot.new( gp ) do |plot|
plot.data << Gnuplot::DataSet.new( [x, y] ) do |ds|
ds.with = "linespoints"
ds.notitle
end
end
end
Scala
{{libheader|Scala}}
import scala.swing.Swing.pair2Dimension
import scala.swing.{ MainFrame, Panel, Rectangle }
import java.awt.{ Color, Graphics2D, geom }
object PlotCoordPairs extends scala.swing.SimpleSwingApplication {
//min/max of display-x resp. y
val (dx0, dy0) = (70, 30)
val (dxm, dym) = (670, 430)
val (prefSizeX, prefSizeY) = (720, 480)
private def ui = new Panel {
import math._
val xmax = {
val f1 = pow(10, log10(xs.max).toInt)
val f2 = if (f1 < 10) 10 else round(xs.max / f1) * f1
if (f2 >= xs.max) f2 else (round(xs.max / f1) + 1) * f1
}
val ymax = {
val f1 = pow(10, log10(ys.max).toInt)
val f2 = if (f1 < 10) 10 else round(ys.max / f1) * f1
if (f2 >= ys.max) f2 else (round(ys.max / f1) + 1) * f1
}
val (xinterv, yinterv) = (xmax / xs.size, ymax / xs.size)
case class Coord(x: Double, y: Double) {
val (dx, dy) = ((x / xmax * (dxm - dx0) + dx0).toInt, (dym - y / ymax * (dym - dy0)).toInt)
}
val pcentre = Coord(0, 0)
val pxmax = Coord(xmax, 0)
val pymax = Coord(0, ymax)
background = Color.white
preferredSize = (prefSizeX, prefSizeY)
//axes:
val a_path = new geom.GeneralPath
a_path.moveTo(pxmax.dx, pxmax.dy)
a_path.lineTo(pcentre.dx, pcentre.dy) //x-axis
a_path.lineTo(pymax.dx, pymax.dy) //y-axis
// interval ticks:
xs.map(i => Coord(i * xinterv, 0)).map(p => {
a_path.moveTo(p.dx, p.dy)
a_path.lineTo(p.dx, p.dy + 5)
})
xs.map(i => Coord(0, i * yinterv)).map(p => {
a_path.moveTo(p.dx, p.dy)
a_path.lineTo(p.dx - 5, p.dy)
})
//grid:
val g_path = new geom.GeneralPath
(1 to xs.size).
map(i => Coord(i * xinterv, 0)).map(p => {
g_path.moveTo(p.dx, p.dy);
g_path.lineTo(Coord(p.x, ymax).dx, Coord(p.x, ymax).dy)
})
(1 to xs.size).map(i => Coord(0, i * yinterv)).map(p => {
g_path.moveTo(p.dx, p.dy);
g_path.lineTo(Coord(xmax, p.y).dx, Coord(xmax, p.y).dy)
})
//labeling:
val xlabels = (0 to xs.size).map(i => {
val p = Coord(i * xinterv, 0)
Triple(p.x.toInt.toString, p.dx - 3, p.dy + 20)
})
val ylabels = (0 to xs.size).map(i => {
val p = Coord(0, i * yinterv)
Triple(p.y.toInt.toString, p.dx - 30, p.dy + 5)
})
//curve:
val path = new geom.GeneralPath
val curve = xs.map(i => Coord(xs(i), ys(i)))
path.moveTo(curve.head.dx, curve.head.dy)
curve.map(p => path.lineTo(p.dx, p.dy))
//...flag all function values:
val rects = curve.map(p => new Rectangle(p.dx - 3, p.dy - 3, 6, 6))
override def paintComponent(g: Graphics2D) = {
super.paintComponent(g)
g.setColor(Color.lightGray)
g.draw(g_path)
g.setColor(Color.black)
g.draw(a_path)
xlabels.map(t => g.drawString(t._1, t._2, t._3))
ylabels.map(t => g.drawString(t._1, t._2, t._3))
g.draw(path)
rects.map(g.draw(_))
}
}
val xs = 0 to 9
val ys: List[Double] = List(2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0)
def top = new MainFrame {
title = "Rosetta Code >>> Task: Plot coordinate pairs | Language: Scala"
contents = ui
}
}
Scilab
--> x = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
--> y = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0];
--> plot2d(x,y)
Sidef
{{trans|Perl}}
require('GD::Graph::points')
var data = [
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
[2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0],
]
var graph = %s'GD::Graph::points'.new(400, 300)
var gd = graph.plot(data)
var format = 'png'
File("qsort-range.#{format}").write(gd.(format), :raw)
Stata
clear
input x y
0 2.7
1 2.8
2 31.4
3 38.1
4 58.0
5 76.2
6 100.5
7 130.0
8 149.3
9 180.0
end
lines y x
graph export image.png
Tcl
{{libheader|Tk}} {{libheader|Img}} [[File:Tcl_Plotxy.png|thumb|right|150px|Screenshot for Tcl code]] This solution does not use existing plotting packages, but constructs the graphics from bare-metal Tk code.
package require Tk
# The actual plotting engine
proc plotxy {canvas xs ys} {
global xfac yfac
set maxx [tcl::mathfunc::max {*}$xs]
set maxy [tcl::mathfunc::max {*}$ys]
set xfac [expr {[winfo width $canvas] * 0.8/$maxx}]
set yfac [expr {[winfo height $canvas] * 0.8/$maxy}]
scale $canvas x 0 $maxx $xfac
scale $canvas y 0 $maxy $yfac
foreach x $xs y $ys {
dot $canvas [expr {$x*$xfac}] [expr {$y*$yfac}] -fill red
}
}
# Rescales the contents of the given canvas
proc scale {canvas direction from to fac} {
set f [expr {$from*$fac}]
set t [expr {$to*$fac}]
switch -- $direction {
x {
set f [expr {$from * $fac}]
set t [expr {$to * $fac}]
$canvas create line $f 0 $t 0
$canvas create text $f 0 -anchor nw -text $from
$canvas create text $t 0 -anchor n -text $to
}
y {
set f [expr {$from * -$fac}]
set t [expr {$to * -$fac}]
$canvas create line 0 $f 0 $t
$canvas create text 0 $f -anchor se -text $from
$canvas create text 0 $t -anchor e -text $to
}
}
}
# Helper to make points, which are otherwise not a native item type
proc dot {canvas x y args} {
set id [$canvas create oval [expr {$x-3}] [expr {-$y-3}] \
[expr {$x+3}] [expr {-$y+3}]]
$canvas itemconfigure $id {*}$args
}
pack [canvas .c -background white]
update
set xs {0 1 2 3 4 5 6 7 8 9}
set ys {2.7 2.8 31.4 38.1 58.0 76.2 100.5 130.0 149.3 180.0}
plotxy .c $xs $ys
.c config -scrollregion [.c bbox all]
.c move all 20 20
# Save image (this is the only part that requires an external library)
package require Img
set im [image create photo -data .c]
$im write plotxy.png -format PNG
Of course, if we were generating an encapsulated postscript version, we would be able to do that directly.
Note also that in Tk 8.6, there is no need for an external library to write PNG images; the capability is directly supported.
=={{header|TI-89 BASIC}}== [[File:Plotxy-TI-89.png|thumb|right|200px|TI-89 screenshot]]
FnOff
PlotsOff
NewPlot 1, 1, x, y
ZoomData
Ursala
Ursala doesn't plot anything directly, but has libraries to generate LaTeX code for 2D and 3D graphics. The output file has to be run through LaTeX or included into a LaTeX document. Here's the way to do it just as a quick check (all default settings and dots connected with straight lines).
#import std
#import flo
#import fit
#import plo
x = <0., 1., 2., 3., 4., 5., 6., 7., 8., 9.>
y = <2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0>
#output dot'tex' latex_document+ plot
main = visualization[curves: <curve[points: ~&p/x y]>]
([http://i25.tinypic.com/33oi74j.jpg output])
Here's one way you might do it if you were interested in publication quality graphics. The dots are connected with a cubic spline interpolating function sampled at 200 points, and the axes are nicely labeled.
main =
visualization[
abscissa: axis[
variable: 'problem size',
hats: printf/*'%0.0f' ari10/0. 9.],
ordinates: ~&iNC axis[
variable: 'execution time ($\mu$s)',
hats: printf/*'%0.1f' ari6/0. 180.],
curves: <
curve[
points: ^(~&,chord_fit0@p/x y)* ari200/0. 9.,
attributes: {'linecolor': 'lightgray'}],
curve[
scattered: true,
points: ~&p/x y,
attributes: {'linecolor': 'black'}]>]
([http://i32.tinypic.com/x1x6cz.jpg output])
VBA
Using Excel
Private Sub plot_coordinate_pairs(x As Variant, y As Variant)
Dim chrt As Chart
Set chrt = ActiveSheet.Shapes.AddChart.Chart
With chrt
.ChartType = xlLine
.HasLegend = False
.HasTitle = True
.ChartTitle.Text = "Time"
.SeriesCollection.NewSeries
.SeriesCollection.Item(1).XValues = x
.SeriesCollection.Item(1).Values = y
.Axes(xlValue, xlPrimary).HasTitle = True
.Axes(xlValue, xlPrimary).AxisTitle.Characters.Text = "microseconds"
End With
End Sub
Public Sub main()
x = [{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}]
y = [{2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0}]
plot_coordinate_pairs x, y
End Sub
XPL0
XPL0 does not provide a library routine for plotting graphs. An issue with this particular task is how general to make the code. This is pretty specific.
[[File:PlotXPL0.png|140px|thumb|right|Output]]
include c:\cxpl\codes; \intrinsic 'code' declarations
def ScrW=640, ScrH=480, VidMode=$101;
def Sx = ScrW/10, \pixels per horz grid line
Sy = ScrH/10, \pixels per vert grid line
Ox = (3+1+1)*8+2, \offset for horz grid: allow room for "180.0"
Oy = ScrH-20; \offset for vert grid: allow room for labels
int X, DataX;
real Y, DataY, Gain;
def Brown=6, LCyan=11;
[DataX:= [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
DataY:= [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0];
SetVid(VidMode);
for X:= 0 to 9 do \draw grid
[Move(X*Sx+Ox, Oy); Line(X*Sx+Ox, Oy-9*Sy, Brown); \vert lines
Move(Ox, Oy-X*Sy); Line(9*Sx+Ox, Oy-X*Sy, Brown); \horz lines
];
Format(3,1); Attrib(LCyan); \label grid
Y:= 0.0;
for X:= 0 to 9 do
[Move(X*Sx+Ox-3, Oy+6); IntOut(6, X); \X axis
Move(0, Oy-X*Sy-7); RlOut(6, Y); \Y axis
Y:= Y + 20.0;
];
Gain:= float(Sy)/20.0;
Move(DataX(0)*Sx+Ox, Oy-Fix(DataY(0)*Gain)); \plot points
for X:= 1 to 9 do
Line(DataX(X)*Sx+Ox, Oy-Fix(DataY(X)*Gain), LCyan);
if ChIn(1) then []; \wait for key
SetVid(3); \restore text
]
Yorick
x = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
y = [2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.0];
window, 0;
plmk, y, x;
window, 1;
plg, y, x, marks=0;
zkl
{{trans|gnuplot}}{{trans|Go}} Solution using gnuplot. Output is the same as for the gnuplot example on this page.
A program can of course supply commands and data to gnuplot as prepared files. For the spirit of controlling plotting with the native language however, this example shows how commands and data can be prepared programmatically and supplied to gnuplot through stdin.
#<<<
cmd:=0'|
#set term wxt # X11
unset key # Only one data set, so the key is uninformative
plot '-' # '-' can be replaced with a filename, to read data from that file.
0 2.7
1 2.8
2 31.4
3 38.1
4 68.0
5 76.2
6 100.5
7 130.0
8 149.3
9 180.0
e
|;
#<<<
gnuplot:=System.popen("gnuplot","w");
gnuplot.write(cmd); gnuplot.flush();
ask("Hit return to finish"); gnuplot.close();