[NumPy-Tickets] [NumPy] #1545: Add a norm keyword arg to fft functions

NumPy Trac numpy-tickets@scipy....
Wed Jul 14 21:38:25 CDT 2010


#1545: Add a norm keyword arg to fft functions
-------------------------------------------------+--------------------------
 Reporter:  dgoldsmith                           |       Owner:  somebody
     Type:  enhancement                          |      Status:  new     
 Priority:  normal                               |   Milestone:  2.0.0   
Component:  numpy.fft                            |     Version:  1.4.0rc1
 Keywords:  normalization keyword ortho unitary  |  
-------------------------------------------------+--------------------------
 Presently, the fft functions return the unscaled transform and the ifft
 functions return the (1/n)-scaled inverse transform, meaning that neither
 result is unitary.  In contrast, the discrete cosine transform (DCT)
 functions in scipy.fftpack include a keyword argument (norm) which, when
 set to "ortho," normalize both the forward and inverse transforms (both
 functions have the keyword argument) by 1/sqrt(n), thus returning unitary
 results.  There appears to be no reason why the fft functions couldn't
 also support this.

-- 
Ticket URL: <http://projects.scipy.org/numpy/ticket/1545>
NumPy <http://projects.scipy.org/numpy>
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