Quintino, One thing you can try is to export the functional column to a FreeSurfer Functional File (extension ".w.asc"). On the File Menu- >Save Data File Dialog, set the Filter to FreeSurfer Functional. This file contains two columns where the first column contains the node number and the second column contains the node's functional value. Nodes are only listed if the functional value is non-zero. However, there is a bug in the current version of Caret in that it erroneously starts the file with zero values for all nodes which are then followed by the correct data containing nodes with non-zero functional values. So, ignore the zero data.
Another alternative is running "caret_command -surface-topology- neighbors" with your flat surface's topology file. This can help you identify nodes that are in your flat surface by listing nodes with neighbors. Each line of the output contains a node number. Following the node number, on the same line, are the connected neighbors of the node. John Harwell On Nov 6, 2008, at 10:07 AM, Donna Dierker wrote: > Hi Quintino, > > Post to caret-users@brainvis.wustl.edu rather than > [EMAIL PROTECTED]; the latter address is just > aliased > to me, so if I'm out of the office, no one else will see your message. > Posting to caret-users gets many more brains on your question. > > As far as I know, there is no way for Caret to output a metric file > that > includes only a subset of nodes. (It is possible this functionality > is > supported in the GIFTI standard, and that Caret supports it; if so, > John > Harwell will clarify.) > > The best you can do is zero out (or set to a number that is more > obviously not sane, like -99999) the nodes outside the flat > surface. If > you are visualizing your results on the flat surface, then the > disconnected nodes won't be visible. Likewise, you can assign the > same > CUT topology file to your fiducial and/or inflated 3D surfaces, so > that > those nodes are not visible. > > Finally, if you are using a third party software package like matlab > to > manipulate your metric files, you could also use a paint file to > identify nodes inside the surface or outside the surface. Paint files > are like metric files, except the nodal information is > discrete/categorical/ROI vs continuous/scalar/functional. > > Donna > > On 11/06/2008 09:44 AM, Quintino Mano wrote: >> Hi all, >> >> I'm in the process of deforming a flat surface, which is a selected >> patch from the left occiptio-temporal cortex. In doing so, the >> corresponding metric file is also deformed, which is great, but >> unfortunately the resultant metric file includes nodes from the >> entire >> hemisphere, and not just the nodes in my flat surface. Does anyone >> know how to deform a metric file that is comprised of only nodes that >> are contained in flat surface? >> >> Many thanks in advance! >> >> Quintino >> > > _______________________________________________ > caret-users mailing list > caret-users@brainvis.wustl.edu > http://brainvis.wustl.edu/mailman/listinfo/caret-users > _______________________________________________ caret-users mailing list caret-users@brainvis.wustl.edu http://brainvis.wustl.edu/mailman/listinfo/caret-users
