specific pattern from the file name

I want to extract the project number from the file name

example the file fame is: 'abcdd-22_Z12'

the project number should be Z12 for sure it is dynamic name could in the next file name Z11 for intance.

which expression I should use

Answer 1

[per isakson]

These statements

%%
chr = 'abcdd-22_Z12';
cac = regexp( chr, '(?<=_)Z\d{2}', 'match' );
cac{:}

return

ans =
    'Z12'
    

This regex, '(?<=_)Z\d{2}', matches a literal "Z" followed by two digits, which is preceded by underscore.

[ayman mounir]

Thanks It works perfectly

Answer 2

[Walter Roberson]

[~, basename, ext] = fileparts(FileName);
parts = strsplit(basename, '_');
project = parts{end};

In some cases this can be simplified: for example if the directory and extension are already removed from FileName then

project = regexp(FileName, '(?<=_).*', 'match');

[ayman mounir]

Thanks It works perfect