On Sat, May 21, 2022 at 3:39 AM Adrien Mathieu
wrote:
> It took me some time to understand why you were mentioning A%.A, as
> matrix multiplication is not commutative. Turns out, by reading the
> documentation, that x%.y is actually (%.y) +/ .* x, not x +/ .* %.y as I
> implicitly assumed. Btw, wh
Somehow, this makes sense, yes. We don't know how to divide by anything
but a matrix, so the right rank is 2, but we know how to multiply two
things that are more than matrices, so it's ok to have a left right _.
It took me some time to understand why you were mentioning A%.A, as
matrix multip
First off, this is a good question.
That said, it's matrix divide because we are "dividing by" a matrix.
But maybe it's easier to illustrate this than explain it:
'A B C'=:ABC=: p:i.3 3 3
ABC%.A
3.92308 4 2.25641
2 1.84615 1.58974
0.923077 _0.410256 _0.974359
5.230
