You can do it to the sig file (the p-value already assumes a two-sided test). Why do you want to do it with the ces and cesvar files? If you are planning to use the abs(ces) for a higher level analysis then you need to be very careful as you can get some unintended effects doug
On 01/07/2014 03:46 PM, SHAHIN NASR wrote: > Hi, > I have two related questions. I have two conditions (e.g. C1 and > C2) and I want to generate a map that shows all voxels that can > differentiate C1 from C2 _irrespective_ of whether C1>C2 or C1<C2. I > think it can be done easily by: > > mris_calc -o sig.nii abs_sig.nii abs > > If I am right, then: > 1) Can I apply the same command to ces.nii file to have the absolute > value of the effect size (i.e. abs(C1-C2 effect size)) or should I > consider other factors? > 2) Do I need to apply the same routine to cesvar? > > Thanks > -- > Shahin Nasr > > PhD in Cognitive Neuroscience > Martinos Imaging Center, MGH > Harvard Medical School -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
