The variable Edj appears to change size consider preallocating

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

[Gifari Zulkarnaen]

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

[Image Analyst]

I think you meant

E = zeros(d, n);

[Jacob Muvingi]

So should I write Edj=zeros(d,n);

[Jacob Muvingi]

I am still getting the same error, after I have done the following;

for j=1:n
    Edj=zeros(d,n);
    E(d,j)=y(j, :)*V(s+1:s+m,d)/ (x(j,:)*V(1:s,d));
end
Ecros=sum(Edj)/n
end

. If I use matrices with equal sizes I am not getting the error. My

x=[1 6 1.5 4 7.5 1 4.5 2 3 8 1.875 5 1.5 5.5 1.25 5 3 3 12 1.6 5.1 1.8 2 7];
y=[1 1 1 1 1 1 1 1 1 1 1 1];

[Stephen23]

"So should I write Edj=zeros(d,n);"

No, you should write what Image Analyst told you.

"I am still getting the same error..."

It is a warning, not an error.

"...after I have done the following;"

Array preallocation needs to be before the loop, e.g.:

E = zeros(d,n);
for j = 1:n 
    E(d,j) = ...
end 

[Jacob Muvingi]

The issue of preallocation seem to have resolved, however getting message Matrix dimensions must agree referring to line for calculation of E(d,j). My matrices are of different sizes, y is 1*12, x is 2*12. V are weights for each x and y value.