I have the sparse matrix array L=
(36,67) 1(39,70) 1(42,73) 1(45,76) 1(48,79) 1(51,82) 1(54,85) 1
and a large matrix M. I need to use the index coordinates of each of the elements in L, offset the coordinates by some amount, find the element in matrix M having those coordinates, and multiply the result. The operation must be vectorized.
A pseudocode might look like:
out=L*M(Lrow+5,Lrow+Lcolumn-15);
where Lrow is the row in L and parentheses are the matrix coordinates in M, determined for each element in L.
Thanks.
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