I'd take a look at my gPPI toolbox. timeseries_extract.m has the necessary code for using a mask and selecting only significant voxels. It doesn't currently have an option for going to the nearest max or specifying a sphere. It has the adjustment built into the code as well. 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 Website: http://www.martinos.org/~mclaren 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 Mon, Feb 27, 2012 at 3:33 AM, Omar Mothersill <[log in to unmask]> wrote: > Dear SPM users, > > I wish to write a script to extract eigenvariates from the same ROI for a > large number of subjects. There is a script for PPI on the spm website > that includes a similar section (I've included this section of the script > with the e-mail). However, there are some changes I need to make, and I'm > not sure of the Matlab commands. > > > 1. When selecting results for a SPM.mat file, how do I add a > specification to mask the results with an image? > 2. When selecting co-ordinates for a VOI, what command selects the > global maxima? (In the PPI script it specifies specific co-ordinates). > 3. When selecting a VOI, what command adjusts data for a contrast > (e.g. effect of interest). > > > Any advice would be greatly appreciated! > > Kind regards, > > Omar > > -- > Omar Mothersill > > Room 0.18 > Neuropsychiatric Genetics Group > Dept. of Psychiatry > Trinity Centre for Health Sciences > St. James's Hospital > Dublin 8. > > Phone: 01 896 2464 > Email: [log in to unmask] > >