It will be the same as the DOF of the individual contrasts (don't sum them).
On 11/11/2014 12:58 PM, Caspar M. Schwiedrzik wrote: > ok, I will try that. How do I get the degrees of freedom? Thanks! Caspar > > 2014-11-11 12:04 GMT-05:00 Douglas N Greve <gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu>>: > > > Actually, you can still do each contrast individually. Each will > produce > ces and cesvar files. Take the difference between the ces files > and the > average of the cesvar files, then feed the result into mri_glmfit FFX > > doug > > > On 11/11/2014 11:56 AM, Caspar M. Schwiedrzik wrote: > > Hi Doug, > > I wanted to follow up on this. Would you be able to provide a > > workaround for contrasting multiple taskregs against each other? Is > > there something I can try in the meantime? Thanks, Caspar > > > > > > 2014-11-10 13:54 GMT-05:00 Caspar M. Schwiedrzik > > <cschwie...@rockefeller.edu <mailto:cschwie...@rockefeller.edu> > <mailto:cschwie...@rockefeller.edu > <mailto:cschwie...@rockefeller.edu>>>: > > > > Hi Doug, > > thanks for your reply. I would like to feed the differences > into a > > FFX group analysis, so I think I will need to resort to your > > workaround. It would be great if you could provide that. Thanks! > > Caspar > > > > 2014-11-10 13:45 GMT-05:00 Douglas N Greve > > <gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu> > <mailto:gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu>>>: > > > > > > To get sig maps for an individual, this is problematic > but I > > could > > probably come up with a work-around. For a group > analysis, you can > > simply compute each taskreg separately, then subtract > the two > > prior to > > running mri_glmfit. > > doug > > > > On 11/10/2014 01:36 PM, Caspar M. Schwiedrzik wrote: > > > Hi! > > > A quick follow-up: > > > I have a taskreg file with 6 continuous predictors. I > would > > like to > > > run specific contrasts, e.g., predictor 1 vs. > mean(predictor > > 2:6). > > > From what I gather, selxavg3-sess will run automatic > > contrasts on > > > taskregs, but the automatic contrasts are against > baseline. > > This is > > > not what I need at this point. > > > mk-contrast-sess does not like what I am putting in > because > > I do not > > > have a paradigm file in which condition numbers are > specified. > > > Is there a way to compute specific contrasts between > multiple > > > taskregs, and if not, is there a workaround? > > > Thank you very much, Caspar > > > > > > > > > 2014-11-06 15:23 GMT-05:00 Caspar M. Schwiedrzik > > > <cschwie...@rockefeller.edu > <mailto:cschwie...@rockefeller.edu> > > <mailto:cschwie...@rockefeller.edu > <mailto:cschwie...@rockefeller.edu>> > > <mailto:cschwie...@rockefeller.edu > <mailto:cschwie...@rockefeller.edu> > > <mailto:cschwie...@rockefeller.edu > <mailto:cschwie...@rockefeller.edu>>>>: > > > > > > Hi! > > > I have several external regressors in my analysis > that I > > configure > > > with -taskreg in mkanalysis-sess (something like > -notask > > -taskreg > > > nameoffile 6). > > > I was wondering how to set up mkcontrast-sess to > > contrast these > > > regerssors given that I do not have a paradigm > file for > > them. > > > Can I just do something like -a 1 -c 2 -c 3 -c 4 -c 5? > > > > > > Thanks, Caspar > > > > > > > > > > > > > > > _______________________________________________ > > > Freesurfer mailing list > > > Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu> > > <mailto:Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu>> > > >https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > > -- > > Douglas N. Greve, Ph.D. > > MGH-NMR Center > > gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu> > <mailto:gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu>> > > Phone Number: 617-724-2358 <tel:617-724-2358> > <tel:617-724-2358 <tel:617-724-2358>> > > Fax: 617-726-7422 <tel:617-726-7422> <tel:617-726-7422 > <tel:617-726-7422>> > > > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > > FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 > > www.nmr.mgh.harvard.edu/facility/filedrop/index.html > <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> > > > <http://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 > <mailto:Freesurfer@nmr.mgh.harvard.edu> > > <mailto:Freesurfer@nmr.mgh.harvard.edu > <mailto: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. > > > > > > > > > > > > _______________________________________________ > > Freesurfer mailing list > > Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu> > > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu> > Phone Number: 617-724-2358 <tel:617-724-2358> > Fax: 617-726-7422 <tel:617-726-7422> > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 > www.nmr.mgh.harvard.edu/facility/filedrop/index.html > <http://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 <mailto:Freesurfer@nmr.mgh.harvard.edu> > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- 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
