[Numpy-tickets] [NumPy] #461: std/stdp

NumPy numpy-tickets@scipy....
Sun Mar 4 09:28:54 CST 2007


#461: std/stdp
-------------------------+--------------------------------------------------
 Reporter:  batripler    |       Owner:  somebody
     Type:  enhancement  |      Status:  new     
 Priority:  normal       |   Milestone:          
Component:  numpy.lib    |     Version:  1.0.1   
 Severity:  normal       |    Keywords:          
-------------------------+--------------------------------------------------
 The current definition of .std is non-standard: it returns the population
 standard deviation (dividing by n), rather than the unbiased sample
 estimate (dividing by n-1). Moreover, it is an inconsistent naming versus
 other packages:[[BR]]
 - Matlab: std(X) vs. std(X,1)[[BR]]
 - Excel: STDEV vs. STDEVP [[BR]]
 - Mathematica: StandardDeviation[[BR]]


 Could the current .std be renamed .stdp and a new .std method do the
 "right thing"? Or, could an optional parameter be added?

-- 
Ticket URL: <http://projects.scipy.org/scipy/numpy/ticket/461>
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