I'm not sure why what I wrote isn't working in terms of extracting the string I want.

I have:

filename = Synch_ab001.mat;
underscore_indices = strfind(filename, '-');
period_indices = strfind(filename, '.');
SubjectName = strtok(filename(underscore_indices(end)+1:period_indices(end)-1));

I wrote this to extract just the ab001 as SubjectName, but I keep getting a "subscript indices must either be real positive integers or logicals."

[Walter Roberson]

Please do not close questions that have an answer. If you are satisfied with one of the solutions offered, Accept that answer.

Answer 1

[Paolo]

 filename = 'Synch_ab001.mat';
 subjectname = regexp(filename,'(?<=_)(.*)(?=\.\w*)','match')

Answer 2

[Image Analyst]

First of all filename is not a string. That should have thrown an error right away. Even if it were a string, you're looking for dashes and there are no dashes in the name. Try looking for underscores:

filename = 'Synch_ab001.mat';
underscore_indices = strfind(filename, '_')
period_indices = strfind(filename, '.')
SubjectName = strtok(filename(underscore_indices(end)+1:period_indices(end)-1))

Answer 3

[Walter Roberson]

filename = 'Synch_ab001.mat';
temp = regexp(filename, '[_.]', 'split');
subjectname = temp{2};