matlab - variable in plot title

Question

I want to do

for i = 1 : size(N, 2)
    figure(i);
    title('N = %d', i);
%other stuff

but setting the title doesn't work. Why?

Solution 1

Because you forgot to add sprintf

for i = 1 : size(N, 2) 
figure(i); 
title(sprintf('N = %i', i)); %# %i for integer
%other stuff
end

Solution 2

num2str should also works.

title(['N = ',num2str(i)]);