how to write a character from a string?

Hi I didn't use commands for strings in matlab so i have a word like 'displacement22' and i want to write '22' from this string, so what would i do?

Answer 1

s = 'displacement22' % Your string.
theNumber = sscanf(s, 'displacement%d') % Extract the number.

Answer 2

s='displacement22' ;
out=s(regexp(s ,'[0-9]'))

%or

 out=s(regexp(s ,'\d'))

Answer 3

s = 'displacement22';
s = strrep(s, 'displacement', '');