[Numpy-tickets] [NumPy] #638: var should take absolute value for complex numbers.

NumPy numpy-tickets@scipy....
Sun Dec 30 01:21:31 CST 2007


#638: var should take absolute value for complex numbers.
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 Reporter:  akumar       |        Owner:  somebody
     Type:  defect       |       Status:  new     
 Priority:  normal       |    Milestone:  1.0.5   
Component:  numpy.core   |      Version:  none    
 Severity:  normal       |   Resolution:          
 Keywords:  var complex  |  
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Comment (by rkern):

 Hmm. You'll note, though, that the result is a matrix, not a single real
 or complex value. It is the result of finding the full covariance matrix
 of the 2-vector (real, imag). You really want to use {{{cov()}}}, not
 {{{var()}}}. Probably, we should just disallow complex values for
 {{{var()}}}.

-- 
Ticket URL: <http://scipy.org/scipy/numpy/ticket/638#comment:5>
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