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I'd use the gPPI toolbox. It is now hosted at: www.nitrc.org/projects/gppi Best Regards, Donald McLaren ================= D.G. McLaren, Ph.D. Postdoctoral Research Fellow, GRECC, Bedford VA Research Fellow, Department of Neurology, Massachusetts General Hospital and Harvard Medical School Office: (773) 406-2464 ===================== This e-mail contains CONFIDENTIAL INFORMATION which may contain PROTECTED HEALTHCARE INFORMATION and may also be LEGALLY PRIVILEGED and which is intended only for the use of the individual or entity named above. If the reader of the e-mail is not the intended recipient or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that you are in possession of confidential and privileged information. Any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited and may be unlawful. If you have received this e-mail unintentionally, please immediately notify the sender via telephone at (773) 406-2464 or email. On Thu, Jan 26, 2012 at 1:00 PM, Claire (Jung Eun) Han <[log in to unmask] > wrote: > Dear experts, > > I am not sure how to create the matrix that goes under 'Input variables > and contrast weights' when creating the PPI variable. > > I have attached our study's design matrix. > We have two runs and five conditions (aggressor, victim, control for > aggressor, control for victim and response) although we are putting the two > runs together when creating contrast images. > I would like to look at 'aggressor vs. control for aggressor'.... > > I would appreciate if you could tell me more in detail how to create the > matrix. > > Thanks, > Claire >