[NumPy-Tickets] [NumPy] #1123: nansum for empty or all nan arrays is not zero

NumPy Trac numpy-tickets@scipy....
Sat Feb 6 09:47:32 CST 2010


#1123: nansum for empty or all nan arrays is not zero
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 Reporter:  josefpktd  |       Owner:  somebody    
     Type:  defect     |      Status:  needs_review
 Priority:  normal     |   Milestone:  1.4.0       
Component:  numpy.lib  |     Version:              
 Keywords:             |  
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Changes (by kwgoodman):

 * cc: kwgoodman (added)


Comment:

 I just ran into this issue while unit testing my labeled array class,
 larry, for proper handling of empty larrys.

 Here's my vote:

 np.nansum([]) should return 0 just like np.sum([])

 and the sum of an array with all NaNs should be NaN.

-- 
Ticket URL: <http://projects.scipy.org/numpy/ticket/1123#comment:8>
NumPy <http://projects.scipy.org/numpy>
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