both the polar angle and eccen will have angle.nii.gz files sampled on the surface. You can load these into matlab with angle = MRIread('angle.nii.gz'); angle.vol will be a vector of length equal to the number of vertices You can load the label with read_label label = read_label('', labelfile); label = label+1; % change to one-base3d angles_in_label = angle.vol(label);

On 07/04/2014 03:19 PM, Jackie Lam wrote:

Hello all,

I’ve just finished retinotopy analysis following http://surfer.nmr.mgh.harvard.edu/fswiki/FsFastIndividualRetinotopyAnalysis%.... Now I’m wondering, is it possible to get quantitative values of polar angle and eccentricity for each vertex from, say, an ROI I’ve drawn out? If so, how would I go about doing that? Which files would I use?

Thank you in advance,

Jack

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