Vector multiplication into a matrix

GAMS
1

Hi,

Newbie here, sorry if this is trivial, how can you multiply two vectors into a matrix (say a n1 times an 1m into a n*m) ? Just multiplying them will surely send an error since the order sets are different, is there a trick here?

With apologies,
Thanks
Sal.

2

Hi

For this you can use a double loop:

set i /i1*i4/, j /j1*j5/;

parameter vector1(i), vector2(j), matrix(i,j);

* Give some random values:
vector1(i) = ord(i);
vector2(j) = ord(j)

loop(i, 
    loop(j, 
            matrix(i,j) = vector1(i) * vector2(j);
      );
);

display matrix;

Cheers
Renger

3

Thanks ! This is very helpful !