MATLAB: Error using ==> times

Question

what does it mean that error below. can anyone explain to me. i can not understand the error. thanks

 ??? Error using ==> times
 Integers can only be combined with
 integers of the same class, or
 scalar doubles.

Answer 1

You can do this:

m = int32(1:3);
n = m .* 2; % integer class times scalar double

You can't do this:

m = int32(1:3);
n = m .* [4:6]; % integer class times same size double

So if you need to do the latter, you can do it like this:

m = int32(1:3);
n = m .* int32([4:6]); % integer class times same size same class