MATLAB: The variable Edj appears to change size consider preallocating

Question

VV(1:size(temp,1),d)=temp; 
for j=1:n 
    E(d,j) = y(j,:)*VV(s+1:s+m,d) / (x(j,:)*VV(1:s,d)); 
end 
Ecros =sum(Edj)/n 
End

Answer 1

The size of your matrix changes at every iteration. Make zero matrix before looping. For example:

Edj = zeros(d,n);

*edited for corrections from Image Analyst and Jacob Muvingi