MATLAB: How to make sure number of digits remain same, padded if required

Question

I am assigning names in a loop of the form img000.png,img001.png and so on. I’m using strcat as follows:

%num=000 %strcat(‘img’,num2str(num),’.png’) %num=+1

How do I make the assignment of num so that it always remains 3 digits?

Answer 1

Try to use something like

img_name=sprintf('img%03d',num)

instead of the strcat line