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Hi, 

In Tracula Wiki, there is a slice of displaying P-values for T-test on differences in mean FA/MD/… between groups following this link and sample plot attached below. 
 https://ftp.nmr.mgh.harvard.edu/pub/docs/TraculaNov2013/tracula.workshop.iii.pdf
I want to know what is the command for this and is there a useful link to demonstrate the process? 
Thank you so much!

Best, 
Qi 

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