expandROI

 expandROI - given an appropriate set of ROI dimensions, expand a ROI matrix

 Usage: ROI = expandROI(roimtx, roisize)
 
 ROIs are saved in an abbreviated form to save space.  To return the ROI into
 a form that makes later calculations easier, use expandROI.  The inputs are
 the ROI matrix, which is of dimension numVoxelsInROI x 4, and the dimensions
 of the output ROI, in the form [numSlices numRows numCols].  The output is
 the ROI, now in dimensions [numSlices numRows numCols].

 $Id: expandROI.m,v 1.3 2003/09/15 15:50:51 nknouf Exp $

0001 function ROI = expandROI(roimtx, roisize)
0002 % expandROI - given an appropriate set of ROI dimensions, expand a ROI matrix
0003 %
0004 % Usage: ROI = expandROI(roimtx, roisize)
0005 %
0006 % ROIs are saved in an abbreviated form to save space.  To return the ROI into
0007 % a form that makes later calculations easier, use expandROI.  The inputs are
0008 % the ROI matrix, which is of dimension numVoxelsInROI x 4, and the dimensions
0009 % of the output ROI, in the form [numSlices numRows numCols].  The output is
0010 % the ROI, now in dimensions [numSlices numRows numCols].
0011 %
0012 % $Id: expandROI.m,v 1.3 2003/09/15 15:50:51 nknouf Exp $
0013 
0014     ROI = zeros(roisize);
0015     ind = sub2ind(roisize, roimtx(:,1), roimtx(:,2), roimtx(:,3));
0016     ROI(ind) = roimtx(:,4);
0017 return;