I tried this:
flamefront = [];
for c = 1:size(mean_max_upper)
r = 1;
indicator = 0;
while indicator == 0;
if mean_max_upper(r,c) >= .25*max(mean_max_upper(r,c));
indicator = 1;
flamefront = [flamefront; r,c];
end
r = r+1;
end
end
where mean_max_upper is the image and flamefront is the array I would like to fill. However it's just running from 1 to the amount of rows and not saving anything.