Hi i'm trying to update this code from a principal component analysis but it does'nt work now. Error in IndexCol (line 61). [w,fval]=f​mincon(@(x​)minTE(x,r​track,y),s​tarting,[]​,[],Aeq,1)​; I'd appreciate your help.

for k=3:N selected=coeff(:,[1:k]); %Varimax rotation B=rotatefactors(selected,'Method','varimax');% %Selection of index tracking members [C,I]=max(abs(B)); winner=names(I);

    %TE minimization
    rtrack=r(:,I);
    ini=1/k;
    starting=repmat(ini,k,1);
    Aeq=ones(1,k);
    [w,fval]=fmincon(@(x)minTE(x,rtrack,y),starting,[],[],Aeq,1);

    %Tracking error for in-of-sample period
    d=w'*rtrack'-y';
    TE(k-2,1)=std(d)*100;

    %Plot out-of-sample performance
    outSample=inSample+1;
    rout=r1(outSample:end,I);
    x1=1:size(rout);
    trackIndexOut=w'*rout';
    yout=y1(outSample:end);

    %Tracking error for out-of-sample period
    d=w'*rout'-yout';
    TEOut(k-2,1)=sqrt(d*d')*100;
end