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1D Walsh Transform 1.0

  Date Added: May 12, 2013  |  Visits: 165

1D Walsh Transform

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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 implies that it is efficient to call the function in a loop as long as the arguments passed remain the same.The transform is faster than other (loop-) implementations found here on the File Exchange since the loop induces a lot of overhead.This file is actually just part of my 2D-Walsh-Transform file submission (ID 20312).Type "help walsh" for help.>> help walsh WALSH Hadamard matrix. WALSH(N) is a Walsh matrix of order N, that is, a matrix W with elements 1 or -1 such that W'*W = N*EYE(N). An N-by-N Walsh matrix with N > 2. This function handles only the cases where N is a power of 2. The function internally cashes the generated matrix so that it is efficient to call this function multiple times if the passed parameters remain the same among the calls. WALSH(N,CLASSNAME) produces a matrix of class CLASSNAME. CLASSNAME must be either 'single' or 'double' (the default).

Requirements: No special requirements
Platforms: Matlab
Keyword: Cases Elements Handles Neyen Order Quothelp W039w Walsh Walshquot
Users rating: 0/10

License: Shareware Size: 10 KB
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