setting range of a variable

[Mary]

Hi,

If i have a problem where i need to define the range of values a variable can pick, how would i do that?

for instance,

a variable T is a matrix of NXM dim, and values can be [-1,0,1]

Regards

Mary

[Johan Löfberg]

ismember

or manually (very simple when it is only -1,0 or 1)

T =-binvar(N,M,'full') + binvar(N,M,'full')

or manually more general

possiblevalues = [pi;34;-1];
 pick = binvar(N*M,length(possiblevalues),'full');
T = reshape(pick*possiblevalues,N,M);
Constraints = sum(T,2)==1;