[SciPy-user] scipy choice of defaults for matrix manipulation
oliphant at ee.byu.edu
Thu Aug 5 22:05:57 CDT 2004
Alan G Isaac wrote:
>Looking at briefly at Numeric and numarray, it seems they
>have made an effort to standardize on axis=0. This is also
>true in the Matlab module. Wouldn't it be wise for SciPy
>to join the parade? (I.e., shouldn't these closely related
>and interdependent packages share a convention?
>Otherwise, this is going to be VERY confusing for users.
>(As it was for me.) Now when I call a such a function,
>I have to remember: is it a SciPy function, or a
>Numeric/numarray function? Not a good situation, right?
This is only true for some functions, others have axis=-1.
SciPy came before numarray and we tried to standardize the Numeric
functions. The vision of SciPy is that you would have no need to call a
Numeric function. You would always call the SciPy function.
We have been trying to standardize on axis=-1 to prevent this very
confusion you are having. The existence of numarray is actually
confusing the situation, because numarray is more than just an array
object it is also re-inventing several of the array operations that are
already in SciPy. At this point you should ignore the MATLAB module as
it is completely obsolete and is a way watered-down version of what
SciPy is becoming.
This is fragmenting the community and is not a good thing in my
opinion. You may make a case for which standard is appropriate but the
axis=-1 was decided on after some deliberation. It is open for discussion.
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