how to format integer numbers to start with filling zeros?

I would like to transform n = 1:12 to '01','02',...,'11','12'

Answer 1

[Stephen23]

This only makes context in terms of strings, in which case sprintf makes this easy:

>> sprintf('%02d ',1:12)
ans = 01 02 03 04 05 06 07 08 09 10 11 12

And if you want them in a cell array just use strsplit on it, or cellstr.

Answer 2

[Walter Roberson]

cellstr(num2str((1:12).', '%02d'))

or

arrayfun(@(x) sprintf('%02d', x), 1:12, 'Uniform', 0);