Hi, I am sorry for this naive an likely many time answered question, but a first search did not bring up any clear statement to this issue.
I use caret to view functional data on inflated monkey brains. The data was analysed with FSL on data oriented according to a coordinate system based on eye and ear bars, but the caret files use the anterior,posterior commisure, hence I apply a transformation to my thresholded functional data (z-values) including a trilinear interpolation. This of course lead to subthreshold values surrounding the patches, and reduced, more smooth values within patches. In the step of mapping the volume data to the surface I again apply interpolation/averaging of the z-values. I am wondering now, if this is an accepted procedure and that the interpolation of statistical maps is in general not seen as a serious problem. Though the statistics of the maps are reduced and smeared, I doubt that this introduces a serious misplacement of the activation foci. However, I don't fell well to present the range of z-values as 'z-values' anymore, because of the interpolation. I am happy for any pointers regarding such issues. thanks, wolf _______________________________________________ caret-users mailing list [email protected] http://brainvis.wustl.edu/mailman/listinfo/caret-users
