On Mon, Jun 23, 2008 at 19:35, Ryan May <[EMAIL PROTECTED]> wrote: > Robert Kern wrote: >> On Mon, Jun 23, 2008 at 18:10, Sebastian Haase <[EMAIL PROTECTED]> wrote: >>> On Mon, Jun 23, 2008 at 10:31 AM, Bob Dowling <[EMAIL PROTECTED]> wrote: >>>> [ I'm new here and this has the feel of an FAQ but I couldn't find >>>> anything at http://www.scipy.org/FAQ . If I should have looked >>>> somewhere else a URL would be gratefully received. ] >>>> >>>> >>>> What's the reasoning behind functions like sum() and cumsum() being >>>> provided both as module functions (numpy.sum(data, axis=1)) and as >>>> object methods (data.sum(axis=1)) but other functions - and I stumbled >>>> over diff() - only being provided as module functions? >>>> >>>> >>> Hi Bob, >>> this is a very good question. >>> I think the answers are >>> a) historical reasons AND, more importantly, differing personal preferences >>> b) I would file the missing data.diff() as a bug. >> >> It's not. >> > Care to elaborate?
There is not supposed to be a one-to-one correspondence between the functions in numpy and the methods on an ndarray. There is some duplication between the two, but that is not a reason to make more duplication. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
