Octave

GNU Octave is a high-level language, primarily intended for numerical computations. It provides a convenient command line interface for solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that is mostly compatible with MATLAB. (Text taken from the site)

• Octave-Forge: Octave-Forge is a central location for the collaborative development of packages for GNU Octave.

Tasks

• 100 doors
• 24 game
• Accumulator factory
• Ackermann function
• Add a variable to a class instance at runtime
• Apply a callback to an array
• Arithmetic/Complex
• Averages/Arithmetic mean
• Averages/Median
• Averages/Mode
• Averages/Pythagorean means
• Binary search
• Bitmap
• Bitmap/Histogram
• Bitwise operations
• Boolean values
• Brownian tree
• Combinations
• Comments
• Conditional structures
• Copy a string
• Count in factors
• Detect division by zero
• Determine if a string is numeric
• Dot product
• Dynamic variable names
• Empty program
• Ethiopian multiplication
• Evolutionary algorithm
• Execute a system command
• Factorial
• Factors of a Mersenne number
• Fibonacci sequence
• Filter
• Find the missing permutation
• First-class functions
• FizzBuzz
• Function composition
• Function definition
• Gamma function
• Grayscale image
• Greatest common divisor
• Greatest element of a list
• Guess the number/With feedback
• Haversine formula
• Hello world!
• Hello world/Standard error
• Hello world/Text
• Higher-order functions
• Horizontal sundial calculations
• Horner's rule for polynomial evaluation
• Hostname
• Identity matrix
• Image convolution
• Increment a numerical string
• Integer comparison
• Interactive programming
• Kronecker product
• Langton's ant
• Literals/String
• Logical operations
• Loops/Break
• Loops/Continue
• Loops/Do-while
• Loops/Downward for
• Loops/For
• Loops/For with a specified step
• Loops/Foreach
• Loops/Infinite
• Loops/Nested
• Loops/While
• Luhn test of credit card numbers
• MD5
• Mandelbrot set
• Matrix multiplication
• Matrix transposition
• Matrix-exponentiation operator
• Monte Carlo methods
• Munching squares
• Mutual recursion
• N-body problem
• Nth root
• Null object
• Palindrome detection
• Pascal's triangle
• Plot coordinate pairs
• Polynomial long division
• Polynomial regression
• Primality by trial division
• Prime decomposition
• Program name
• Quaternion type
• Random number generator (included)
• Random numbers
• Real constants and functions
• Reduced row echelon form
• Remove duplicate elements
• Rename a file
• Resistor mesh
• Reverse a string
• Roots of a function
• Roots of a quadratic function
• Roots of unity
• Runge-Kutta method
• SHA-1
• Secure temporary file
• Semordnilap
• Shell one-liner
• Sort an integer array
• Sorting algorithms/Bead sort
• Sorting algorithms/Bubble sort
• Sorting algorithms/Cocktail sort
• Sorting algorithms/Counting sort
• Sorting algorithms/Gnome sort
• Sorting algorithms/Quicksort
• Spiral matrix
• String case
• String length
• Sum and product of an array
• Sum of a series
• Sum of squares
• Terminal control/Clear the screen
• Trigonometric functions
• Vector products
• Web scraping
• Welch's t-test
• Zig-zag matrix