Hi Doug, These are the first few lines of the wm.dat.pca-stats.dat file:
1 143481216.00 143481216.00 4.06 4.06 2 77359288.00 220840504.00 2.19 6.25 3 42542944.00 263383448.00 1.20 7.46 4 26329902.00 289713350.00 0.75 8.20 5 21830372.00 311543722.00 0.62 8.82 6 19145688.00 330689410.00 0.54 9.36 7 18512178.00 349201588.00 0.52 9.89 According to the functional connectivity tutorial (http://surfer.nmr.mgh.harvard.edu/fswiki/FsFastFunctionalConnectivityWalkthrough), usually only the first 5 components are used for white matter regression. However, if I understand correctly, it looks like the first five components only remove ~8.82% cumulative variance, is that correct? If so, how should I go about choosing components for white matter regression? Thanks, Afsana ______________________________ Afsana Afzal Clinical Research Coordinator Massachusetts General Hospital Division of Neurotherapeutics Department of Psychiatry: Neurosciences 149 13th St, Room 2612 Charlestown, MA 02129 Phone: 617-643-5129 Fax: 617-726-4078 ________________________________________ From: freesurfer-boun...@nmr.mgh.harvard.edu [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Douglas N Greve [gr...@nmr.mgh.harvard.edu] Sent: Wednesday, January 13, 2016 12:36 PM To: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] Interpreting white matter regressor dat file here you go (1) component number (2) variance spanned by that component (3) cumulative variance spanned up to that component (4) percent variance spanned by that component (5) cumulative percent variance spanned up to that component On 01/13/2016 09:56 AM, Afzal, Afsana wrote: > Hi, > > I have generated white matter regressor files for resting state > analysis using fcseed-config and fcseed-sess. The resulting files > include: wm.dat, wm.dat.pca-stats.dat and wm.dat.log. > > How do I interpret the wm.dat.pca-stats.dat file? There are 388 > numbered rows (I'm guessing one per acquisition since # of > acquisitions is 388?) and five columns. What do the columns represent? > > > Thanks for your help! > > - Afsana > > ______________________________ > *Afsana Afzal* > Clinical Research Coordinator > Massachusetts General Hospital > Division of Neurotherapeutics > Department of Psychiatry: Neurosciences > 149 13th St, Room 2612 > Charlestown, MA 02129 > Phone: 617-643-5129 > Fax: 617-726-4078 > > > _______________________________________________ > 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 _______________________________________________ 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.
