if a string contains any of the strings from an array

I have a str variable below which holds the subject name in the form of "S01_output.xlsx" where '01' part can be any number.

    filename='S02_output.xlsx';
    substring={'02', '04', '07'};

In an if statement, I need to check if filename contains certain numbers which are found in the array called substring. I tried ismember(filename, substring) but I guess it only works when there is exact match.

Answer 1

[Kojiro Saito]

Assuming you're using R2014b, how about the following way with strncmpi ?

filename='S02_output.xlsx';
substring={'02', '04', '07'};
substring2=strcat('S', substring);
tf = strncmpi(filename, substring2, 3)

From R2016b, we can use contains function and it's easier.

 filename='S02_output.xlsx';
 substring={'02', '04', '07'};
 tf = contains(filename, substring)