multi-dimensional sdpvar problem

[yunxiang da]

Hi Johan,

I defined a three-dimensional variable Psij=sdpvar(N,Ng,Nm), but there was an error after running it.

error：Only full matrices are allowed to use n-dimensional indexes.

How can I solve this problem？

Thank you very much.

[Johan Löfberg]

no idea, you would have to supply a minimal reproducible example

[yunxiang dai]

Thank you for the help,This is part of the error code:

......

Psij=sdpvar(N,Ng,Nm);

Pinj=sdpvar(N,1);   

Wgij=binvar(N,Ng,);      

Wlkj=binvar(N,Ns);

Ptcw=sdpvar(N,Nm,);       

Ptcl=sdpvar(N,Nm); 

for s=1:Nm

    for j=1:N

        for i=1:Ng

            B1(j,i,s)=ps(1,s)*(ai(1,i)*Psij(j,i,s)^2+bi(1,i)*Psij(j,i,s)+ci(1,i)*Wgij(j,i));                   error:Incorrect use of sdpvar / subsasgn ( line 248 )  Only full matrices are allowed to use n-dimensional indexes.

        end

        for k=1:Ns

            B2(j,k,s)=ps(1,s)*(Wlkj(j,k,s)*a);      

        end

        B3(j,s)=ps(1,s)*(Ptcw(j,s)*kw+Ptcl(j,s)*kl)

    end

    C1(1,s)=sum(sum(B1));

    C2(1,s)=sum(sum(B2));

end

C=sum(C1)+sum(C2)+sum(sum(B3));     

......

[Johan Löfberg]

code cannot be run, i.e. not a reproducible example

[yunxiang dai]

Sorry, it can be solved when only a single scene is considered and psij is a binary variable. The following is the code when considering multiple scenes, psij is a three-dimensional variable. This will cause the program to run incorrectly.

[Johan Löfberg]

create a dummy variable B1=sdpvar(N,Ng,Nm) and it will run

[yunxiang dai]

Thank you very much. I'll have a try.