[Numpy-discussion] Counting array elements

Russell E Owen rowen at u.washington.edu
Fri Oct 22 11:20:36 CDT 2004


At 11:02 AM -0700 2004-10-22, Chris Barker wrote:
>Stephen Walton wrote:
>
>>  There is a difference between the sum() Ufunc and the sum() method which
>>  is not mentioned in the documentation:  the function works along an
>>  axis, while the method works on the whole array.  That is, A.sum() and
>>  A.flat.sum() are equivalent regardless of the rank of A.
>
>
>Bummer. I was hoping this was a move to a more object-oriented 
>style, rather than different functionality. Also, it's pretty 
>confusing terminology, particularly if it's not documented! Why not 
>.SumAll() or something?

I agree. Numarray is already confusing enough without identically 
named functions and methods that do different things. (nElements and 
size are another pet peeve, with size used in several places and 
nElements appearing exactly once. Though I am grateful to whoever 
added size as a workalike for nElements; formerly you had to know 
what kind of array you had before you knew how to find out how many 
elements it had.)

-- Russell




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