[Scipy-tickets] [SciPy] #675: Hadamard function

SciPy Trac scipy-tickets@scipy....
Wed Mar 24 00:31:53 CDT 2010

#675: Hadamard function
 Reporter:  Ivo           |       Owner:  somebody    
     Type:  enhancement   |      Status:  needs_review
 Priority:  normal        |   Milestone:  0.8.0       
Component:  scipy.linalg  |     Version:              
 Keywords:                |  

Comment(by charris):

 Why not use the numpy log2 function? Or one of the other methods of
 checking for a power of two? For example, n == (-n & n) works for positive
 two's complement integers.

 Are you going to include a fast Hadamard transform also? It is simpler
 than the Walsh transform and you can get from one to the other by indexing
 with a Grey code.

Ticket URL: <http://projects.scipy.org/scipy/ticket/675#comment:4>
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