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Code Listing by Andre

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%WAT3D 3D Walsh or Hadamard Transform
% WAT3D(X, order) will transform the 3D matrix X to the Walsh or Hadmard
% domain depending on the parameter 'order'.
% If order == 'sequency' or 'walsh'
% The function will transform the matrix using the sequency ordered
% walsh functions.
% If order == 'hadamard' or 'natural'
% The function will transform the matrix using the natural...



This function generates a Walsh-Matrix which can be used to perform the 1D-Walsh transform on a vector:
Example:
>> walsh(4)*[1 2 3 4]'

The returned matrix is internally cached within the function (persistent) which...



This function generates the 2D Walsh or Hadamard Transform of a matrix.
Where the Walsh Transform uses the sequency ordered matrix and the Hadamard the natural/hadamard ordered matrix.
The paley ordered transform is not yet...