Question

I have difficulties while converting the following matlab line into C++:

for i=1:height 
  for j=1:width 
    if (match == 0) 
      [min_w, min_w_index] = min(w(i,j,:)); 
      mean(i,j,min_w_index) = double(data(i,j)); 
      sd(i,j,min_w_index) = sd_init; 
    end
    rank = w(i,j,:)./sd(i,j,:); 
    rank_ind = [1:1:C];
  end
end

Especially I don’t know how to covert the “min_w_index” part. Could someone help me on this point?

Answer 1

Most common solution for min function in such case is

int min_w = w[i][j][0];
int min_w_index = 0;
for (k = 1; k < maxk; k++)
   if (w[i][j][k] < min_w)
   {
       min_w = w[i][j][k];
       min_w_index = k;
   }

Don’t forget that C++ has zero-based index, but Matlab one-based. I already see problem in your comment.