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I am having trouble with creating my contrast files. I did go over FsfdExamples (https://secure-web.cisco.com/1ezcK_pFVwJfmWpdVsJeZORU_8kaDi3SfZnw3BO98zpMkJch-p_v87YwJzoqtiefk_hIobUKYja2omqZRjod-i1GdU-HkzipUmBlo5LVsklOHdteQtjAi1L5l1J_T5iRzcE-h_C2xiFxUcjQxPmDrQFVFDP-mFdgiDx4hibkUidw4NEsFW1XHiR7roksIT1GrgvmbILffvuecnvDO6Z8oTqSldk1jddeE0vQYO5WHK19PUmdcg_uW0gtN1EgAhq3AxmE2NcKh2djkfca5f3nqamoDBZ84nG1kz_J43CQgPHPe_lX5eVqUfcsPGuqiMUbpt15_ZNoCDBTS88hFbjyFVA/https%3A%2F%2Fsurfer.nmr.mgh.harvard.edu%2Ffswiki%2FFsgdExamples). However, I am unsure how should I create my contrast files if I want do a 2 group comparison while controlling 4 covariates: Class: Patients, healthy control variables are: Age,gender,episodes,residuals, Here is how I set up my contrast files: 1 -1 0 0 0 0 0 0 0 0 - Contrast1 (measure group differences) 1 -1 0.125 0.125 0.125 0.125 0.125 0.125 0.125 0.125 – Contrast 2 (measure group differences while accounting for covariates) For some reason I think I am setting up those contrast files wrong… Any help is appreciated. Best, Liliana
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