Dear FSL Community,
I am trying to perform a paired t-test on FA of two subjects before and after an intervention using randomise. The processing using FDT and TBSS has gone smoothly and the data quality looks good w/o signs of corruption. However, I am stuck on how to create the proper design.con and design.mat files. I have searched the FSL forum and inferring from item #032946 (which discusses four subjects, not two), I have set up the following:
Order of subjects:
After_subj1
After_subj2
Before_subj1
Before_subj2
View design.mat:
/NumWaves 3
/NumPoints 4
/PPheights 2 1 1
/Matrix
1 1 0
1 0 1
-1 1 0
-1 0 1
View design.con:
/NumWaves 3
/NumConstrasts 2
/PPheights 2 2
/Matrix
1 0 0
-1 0 0
After typing:
[rogerjou@localhost stats]$ randomise -i all_FA_skeletonised -o tbss -m mean_FA_skeleton_mask -d design.mat -t design.con --T2 -V --debug
I get the following within a couple seconds:
randomise options: -i all_FA_skeletonised -o tbss –m mean_FA_skeleton_mask -d design.mat -t design.con --T2 -V --debug
Loading Data:
Data loaded
Finished, exiting.
[rogerjou@localhost stats]$
Can someone please tell me what is going wrong here?
If the design.com and design.mat files are incorrect, can you please tell me the correct setup?
Thanks in advance!
Roger
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