I am trying to run the following code. i am getting an error in line 15 as "Subscript indices must either be real positive integers or logicals".

mbCount = 1; for i = 1:mbSize:row-mbSize+1 for j = 1:mbSize:col-mbSize+1

        % dy is row(vertical) index
        % dx is col(horizontal) index
        % this means we are scanning in order

        dy = motionVect(1,mbCount);
        dx = motionVect(2,mbCount);
        refBlkVer = i + dy;
        refBlkHor = j + dx;
        imageComp(i:i+mbSize-1,j:j+mbSize-1) = imgI(refBlkVer:refBlkVer+mbSize-1, refBlkHor:refBlkHor+mbSize-1);       --line 15

        mbCount = mbCount + 1;
    end
end

Kindly help me. Thanks in advance.

[Joseph Cheng]

check to see if dy or dx is a real positive integer.

[Fox Peterson]

also check on mbSize (is a real positive integer?) , since it's in the range definitions for i and j. also, are there instances where col-mbSize + 1 or row - mbSize + 1 could be less than 1? for example, if mbSize is 20 and col is 10, then 1:20:10-20+1 would not work...