matrix multiplication

[Ian Kelly]

On Mon, Feb 26, 2018 at 2:40 PM, Dan Stromberg <drsalists at gmail.com> wrote:
> On Mon, Feb 26, 2018 at 8:53 AM, Seb <spluque at gmail.com> wrote:
>> On Sun, 25 Feb 2018 18:52:14 -0500,
>> Terry Reedy <tjreedy at udel.edu> wrote:
>>
>> [...]
>>
>>> numpy has a matrix multiply function and now the '@' matrix multiply
>>> operator.
>>
>> Yes, but what I was wondering is whether there's a faster way of
>> multiplying each row (1x3) of a matrix by another matrix (3x3), compared
>> to looping through the matrix row by row as shown in the code.  Perhaps
>> I'm not understanding how to use the broadcasting features of `matmul`.
>
> I'm a bit of a numpy newb, but this sounds like numpy's "broadcasting" feature:
> http://lmgtfy.com/?q=numpy+broadcasting

Taking LMGTFY to a whole new level of rudeness by obviously not even
bothering to read the entire paragraph before responding.