Hello everybody,
Does anyone know how to multiply matrices in GAMS? It is something
very common, but especially hard in GAMS. I don’t know if there is any
function for that or if anybody knows how to make it in any other way.
I give an example:
[1 2 * [4 3 = [8 5
3 4] 2 1] 20 13]
or this other case:
[1 2 * [4 = [8
3 4] 2 ] 20]
I think the second one is easier, that one is enough for me.
Thanks
Pedro
\
Dear Pedro
Although there is a Matrix utility in GAMS:
http://gams.com/mccarl/mccarlhtml/index.html?execution_time_selected_item_gdx_file_creation.htm
I am not sure if there is any built in function in GAMS for multiplication purposes or not. Once you start working with GAMS you should know that it is a different platform from , let’s say MATLAB. It will give you a lot of good computational abilities, and of course has some limitation.
The easy way of doing matrix product, to my limited understanding, is to use the definition of matrix product:
Let’s say in matrix form C(I)=A(I,K)*B(K,1) , which equivalently in GAMS syntax it is:
C(I)=sum(K,A(I,K)*B(K));
Ù…Øمد صادق تولّلی
Mohammad Sadegh Tavallali
National University of Singapore
On Fri, May 20, 2011 at 1:23 AM, Pedro wrote:
Hello everybody,
Does anyone know how to multiply matrices in GAMS? It is something
very common, but especially hard in GAMS. I don’t know if there is any
function for that or if anybody knows how to make it in any other way.
I give an example:
[1 2 * [4 3 = [8 5
3 4] 2 1] 20 13]
or this other case:
[1 2 * [4 = [8
3 4] 2 ] 20]
I think the second one is easier, that one is enough for me.
Thanks
Pedro
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