MATLAB: If inside of for loop

Question

I don't know what is wrong with this code. The code works when I don't include the if statement. Any idea?

for i = 1:3
  if rt > 100 & rt < 1000
      average(i) = mean(rt(cue==i))
      dev(i) = std(rt(cue==i))
  end
end

Answer 1

Or perhaps:

match = (rt > 100 & rt < 1000);
rtx   = rt(match);
cuex  = cue(match);
for i = 1:3
  average(i) = mean(rtx(cuex==i))
  dev(i)     = std(rtx(cuex==i))
end

Note that "if rt > 100 & rt < 1000" is evaluated as:

if all(rt > 100 & rt < 1000) && ~isempty(rt)