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Mathematics Function scripts

Accepting Four Points in 2 space

Photographic document images are often rotated, if only slightly. This code mediates an input of a series of four points--assumed to be the corners of a rectangular document--in any order, as mouse clicks.Then it determines the orientation of the points and calculates a "quality" value, as an indication to the user ...
Python

Wolfram style cellular automata

This is a little script that uses Python to generate the cellular automata that Wolfram discusses in his book "A New Kind of Scilfram disquot;.The script uses the Python Imaging Library to render the output, but you could replace this with text or any other method of visualization. ...
Python

Sparse

'sparse' is a matrix class based on a dictionary to store data using 2-element tuples (i,j) as keys (i is the row and j the column index). The common matrix operations such as 'dot' for the inner product, multiplication/division by a scalar, indexing/slicing, etc. are overloaded for convenience.When used in conjunction ...
Python

ASTVisitor generator

... includes stubs for all of the various visitNODE functions that you might need in a visitor, along with comments in each function that list that node type's attributes. ...
Python

Fractal tree

This script could be used to compute and display a 2D fractal tree. A fractal tree is constructed iteratively by growing new branches, which have a specific length ratio with respect to the parent branch (scaling factor). The fan angle, the number of new branches and number of generations are user controlled. The ...
Python

Function emulation using call

... a simple but useful class that emulates a function to gracefully permit latent assignment. In other words, you can use the emulating class as a valid function in assignments with the ability to later associate a function to perform the actual operations. ...
Python

Call a function method X times per second

This simple generator function is used to call a function X times per second. ...
Python

Remove duplicates from a sequence

... they support full comparisons. This script defines the unique() function that tries three methods, from fastest to slowest, letting runtime exceptions pick the best method available for the sequence at hand. ...
Python

Access Cairo surface from numpy and pygame

This script aliases the memory from a cairo surface so that you can manipulate the bits as a numpy array, or display/manipulate the image in pygame. ...
Python

unzip

unzip script defines a function that represents the opposite of the zip function used for strings operations. As an alternative you could use the function call zip(zip()). ...
Python

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