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Hi In your case simply run melodic from the command line. Assuming that all single subject data has been pre-processed (smoothing/filtering/motion correction) and then transferred into a common space you simply (i) create a ascii text file listing all the input file, e.g. ls ./my_study/my_subject*/fmri/data.nii.gz > all_files.txt (ii) create your own group mask (iii) call melodic with melodic -i all_files.txt -o whereever_you_want_the_output -m mask -a concat [other options] hth Christian On 3 Feb 2010, at 19:09, Leon Leyba wrote: > Hello, > > Thank you for making FSL an open-source tool. It is appreciated. > > Is it recommended that I use "melodic" from the command line (batch) or that > I run the GUI and then edit the feat.fsf file (adding 70 more subjects). > Also, on the GUI, I coudn't figure out how to turn off "Registration" (my > images are already registered) or how to specify my own mask. > > I would like to receive values (PSC) for each session for each component for > each subject, and their corresponding timecourses. > > I'm doing group ICA on pre- registered and normalized data. I have many > (>70) subjects, 3 sessions, and 173 timepoints (TRs) per session. My > experiment is event-related and I'm not assuming that the timecourse for > each session will be the same although I am assuming the spatial maps to be > the same and so I'm choosing "Multisession temporal concatenation". > > I will follow up the ICA with temporal regression to identify components of > interest, region of interest (ROI) analysis, and regression with behavioral > parameters. > > Thank you