Matrix multiplication

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Summary:

Fastest way to perform a matrix multiplication on a list?

Matrix multiplication

CloudVariable 28 Nov 2018 03:08

Does anybody have a matrix multiplication algorithm for matrices stored in lists? I need a way to perform massive matrix multiplications on matrices compressed into lists. In my compression, a matrix
[[a,b,c][d,e,f][g,h,i]] is stored row by row in a list: {a,b,c,d,e,f,g,h,i}. I would like an algorithm for multiplying an m*n matrix by a p*m matrix and keeping it in this list compression syntax.

Re: Matrix multiplication

Bio_Hazard1282 28 Nov 2018 05:44

Still working on the other stuff (m*n and p*m), here's what I got so far:

SetUpEditor L1
For(I,1,[dimension of rows]
For(J,1,[dimension of collumns]]
[Matrix]->L1(1+dim(L1
End:End

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Re: Matrix multiplication

lirtosiast 29 Nov 2018 19:40

What is this for? You might just be better off converting the lists to matrices, multiplying, and converting back.

Re: Matrix multiplication

Xeda Elnara 04 Dec 2018 19:53

I'd like to point out that this is how the calcs store matrices internally, anyways. Not sure how it is compressing :|

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