Inserting one character many times into a string

I have a string with a bunch of words separated by commas

S='Apples,Oranges,January,February,...'

I get a vector with the placement of all the commas with

commas=strfind(s,',');

how do i place a character before every comma in the string, so it will come out like

Snew='Apples2,Oranges2,January2,February2,...'

Answer 1

[Stephen23]

You can simply use strrep:

>> S = 'Apples,Oranges,January,February,...';
>> strrep(S,',','2,')
ans = Apples2,Oranges2,January2,February2,...