Think in 2D about averaging two sine waves that are shifted 90 degrees from one another.
The length of of the resulting line will be far less than that of either curve. On 05/11/2011 11:20 PM, Michael Waskom wrote: > Hi Bruce, > > I've seen this brought up on the list a few times, and, I have to > admit, I've never really been able to wrap my head around it. The > naive part of my brain feel like, if fsaverage is an "average" > subject, it should be smaller than about half of subjects but also > larger than about half of them. I'm sure I'm just not thinking about > it quite the right way, but would you mind unpacking this a little > bit? I suspect I'm not the only one for whom this is somewhat unintuitive. > > Thanks! > > Michael > > On Wed, May 11, 2011 at 6:05 PM, Bruce Fischl > <fis...@nmr.mgh.harvard.edu <mailto:fis...@nmr.mgh.harvard.edu>> wrote: > > > 2. The surface area of fsaverage is less than any individual, so you > *definitely* don't want to use it. > > _______________________________________________ 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.
