How do I run a loop through multiple subjects?

20 views (last 30 days)
Troy Tyszkowski
Troy Tyszkowski on 20 Mar 2020
Commented: Robert U on 20 Mar 2020
I'm sure this question has been asked a fair amount, and I've been attempting to look up the answer on various forums and tutorials, but they don't seem to answer my specific question.
If I have a group of subjects that I want to run a matlab command for, I understand how to set the subjects up as an array (subject_list = {'subject1','subject2'}), but if I am then attempting to run the command through these subjects, how would I enter the new 'subject_list' variable into the command? The command I have is:
roast('subject1/mri/T1.nii') where 'roast' is the command, and /mri/T1.nii is the same for each subject, so the only thing that would be changing is 'subject1' where I would like to loop all of my subjects.

Accepted Answer

Robert U
Robert U on 20 Mar 2020
Hi Troy Tyszkowski,
loop through your subject list (replace the disp()-command by your 'roast'):
subject_list = {'subject1','subject2'};
for nSubject = 1:numel(subject_list)
cmdString = strcat( subject_list{nSubject},'/mri/T1.nii');
Alternatively, use the cellfun()-function to shorten your code. Not so nice to read and debug, but quite quick in execution:
cellfun(@(cIn) disp(strcat(cIn,'/mri/T1.nii')),subject_list)
If you use paths you might want to look into fullfile() and filesep().
Kind regards,
Robert U
Robert U on 20 Mar 2020
Therefore, you can use try, catch-statement. Just leave the catch part empty or fill a warning in to keep track what subject did not work.

Sign in to comment.

More Answers (0)





Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!