[Numpy-tickets] [NumPy] #724: numpy.ma.std and var should match numpy.std and var behaviour

NumPy numpy-tickets@scipy....
Mon Apr 7 00:48:15 CDT 2008


#724: numpy.ma.std and var should match numpy.std and var behaviour
---------------------+------------------------------------------------------
 Reporter:  stefan   |       Owner:  somebody
     Type:  task     |      Status:  new     
 Priority:  normal   |   Milestone:  1.0.5   
Component:  Other    |     Version:  none    
 Severity:  blocker  |    Keywords:          
---------------------+------------------------------------------------------
 Quoting from the mailing list:

 {{{
 numpy.ma has the functions
 "stdu" and "varu", for computing the unbiased standard deviation and
 variance (where one divides by N-1 rather than N). These are now
 available in numpy via std and var with ddof=1. More seriously, they
 still provide the peculiar older definition of var, where
 varu([1,1.j,-1,-1.j])==0.
 }}}

 Update numpy.ma.var and std to accept ddof parameter, and to work
 correctly with complex numbers.  Remove stdu and varu from numpy.ma.

-- 
Ticket URL: <http://scipy.org/scipy/numpy/ticket/724>
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