Hi everyone,
I’m trying to run fixel-based analysis following the MRtrix documentation and I’m not quite sure about the last step, defining the contrast matrix. I’d like to analyse my data with an ANOVA to identify differences between any of the 4 groups that I have. There’s the flag -ftest, I’m not sure if this is what I need to use and how.
Does this option not require a design and contrast matrix, and instead only the “subjects” text file and the “input text file [that] should contain, for each F-test, a row containing ones and zeros, where ones indicate the rows of the contrast matrix to be included in the F-test”?
Where does that second input text file go in the command, and does it contain one element per subject, all in one row, with all the elements being 1 if I want to include all subjects?
Thank you in advance!