matrix index in Parfor loop

Hi all. for code I write below, I want to use Parfor but MATLAB report an Error for definition t(s):ts(s)+a as the index of matrix b. Does anyone have any Idea help me ?

 for s=1:e
   b( s, t(s):ts(s)+a ) = ...
 end

Answer 1

[Matt J]

You must first pre-align the data vectors b( s, t(s):ts(s)+a ) into the columns of a matrix B. That way, parfor can see that the data pieces are parallel across s and can slice them,

    t=t(:).'; %row
    s=(1:e);
    T=bsxfun(@plus, t(1:e),(0:a).');
    S=repmat((1:e),a+1,1);    

    idx=sub2ind(size(b), S,T);

    B=b(idx);

     parfor s=1:e

        B(:,s)= ...

     end

     b(idx)=B;