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Matrix Multiplication in Power Query M. Test example = MatrixMultiplication(#table({"A","B"},{{1,2},{3,4}}), #table({"A","B"},{{1,2},{3,4}}))
(A,B) =>
let
//vector multiplication
dotProduct = (v1,v2) =>
List.Accumulate(
List.Zip({v1,v2}),
0,
(agg,_)=>
agg+(_{1}*_{0}))
in
Table.FromRows(
List.Accumulate(Table.ToRows(A),
{},
(_,ai)=>
_& { List.Accumulate(Table.ToColumns(B),
{},
(_,bj)=>
_&{ dotProduct(ai,bj) })
})
)
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