[Numpy-discussion] Behavior of array scalars
oliphant at ee.byu.edu
Fri Feb 17 16:05:01 CST 2006
>It is actually being translated to "a = add(a,10,a)" by virtue of
>array_inplace_add supplied in the inplace_add slot. Here is the
I think we do need to fix something. Because the problem is even more
apparent when you in-place add
an array to a matrix.
a = rand(5,5)
b = mat(a)
a += b
What do you think the type of a now is? What should it be?
Currently, this code would change a from an array to a matrix because
add(a,b,a) returns a matrix.
I'm thinking that we should establish the rule that if output arrays are
given, then what is returned should just be those output arrays...
This seems to make consistent sense and it will make the inplace
operators work as expected (not changing the type). We are currently
not letting in-place operators change the data-type. Our argument
against that behavior is weakened if we do let them change the Python
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