matlab - variable in plot title

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.开发者_Python百科 Why?

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

num2str should also works.

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