MATLAB: Does num2str not work for double digits

digitsdoublenum2str

Hey everybody,
why does
num = [0 1 2 3 5];
for(i=1:5)
  X(i,:) = ['Hello Nr.',num2str(num(i))];
end
disp(X(:,:))
work fine but when I change num to have numbers with double digits like
num = [0 1 12 3 5];
it doestn't work anymore?

Best Answer

You can use a cell array, but probably the easiest solution is to use the sprintf function:
num = [0 1 12 3 5];
for(i=1:5)
  X(i,:) = sprintf('Hello Nr.%3.0f',num(i));
end
disp(X(:,:))
Hello Nr.  0
Hello Nr.  1
Hello Nr. 12
Hello Nr.  3
Hello Nr.  5
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