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sassas-macrosas-iml

how to multiply each row with each row of another matrix elementwise in sas?

I have a row matrix (vector) A and another square matrix B. How can I multiply each row of matrix B with the row matrix A in SAS using proc iml or otherwise?

Let's say

a = {1 2 3}
b =
{2 3 4
1 5 3
5 9 10}

My output c would be:

{2 6 12
1 10 9
5 18 30}

Thanks!

Solution

  • Use the element-wise multiplication operator, # in IML:

    proc iml;
a = {1 2 3};
b = {2 3 4, 
     1 5 3,
     5 9 10};

c = a#b;
print c;
quit;