How do I quickly do analyses using different parameters like changing the mask or selecting different numbers for data-reduction steps with the same functional data?
Solution: You can do different analyses with the same functional data by copying the parameter file and the Subject file to a different directory. After copying the files, use the setup ICA GUI to change the parameters for the new analysis by specifying the same prefix for the output files you have selected before (If the parameter file name is test_ica_parameter.mat then test is the prefix). You need not to select the subjects again.
