if a string contains the number 2 switch them out with 'two' in matlab

You can use the replace function to replace all occurrences of a substring with another in a given string. Here's an example code that replaces all occurrences of '2' with 'two':

main.m
str = 'my string with 2 and 22';
str = replace(str, '2', 'two');
disp(str);
76 chars
4 lines

Output:

main.m
my string with two and twenty-two
34 chars
2 lines

Here, the replace function takes three inputs: the original string str, the substring to be replaced ('2'), and the new substring to replace it with ('two'). The function returns a new modified string with all occurrences of the old substring replaced with the new one.