Multiplying transposed matrices in mir

9il ilyayaroshenko at gmail.com
Mon Apr 20 02:50:29 UTC 2020


On Monday, 20 April 2020 at 02:42:33 UTC, 9il wrote:
> On Sunday, 19 April 2020 at 20:29:54 UTC, p.shkadzko wrote:
>> On Sunday, 19 April 2020 at 20:06:23 UTC, jmh530 wrote:
>>> [...]
>>
>> Thanks. I somehow missed the whole point of "a * a.transposed" 
>> not working because "a.transposed" is not allocated.
>
> In the same time, the SliceKind isn't matter for assignment 
> operations:
>
> auto b = a.slice; // copy a to b
> b[] *= a.transposed; // works well

BTW for the following operation

auto b = a * a.transposed.slice;

`b` isn't allocated as well because `*` is lazy.

> auto b = a.slice; // copy a to b
> b[] *= a.transposed; // works well

So, the assignment operations are preferable anyway.


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