mfbox_transgrid.m

toolbox for spm 5 for data, model free analysis

function newdata=mfbox_transgrid(oldgrid,olddata,newgrid)
% newdata=mfbox_transgrid(oldgrid,olddata,newgrid)
%
% Copyright by Peter Gruber
% Signal Processing & Information Theory group
% Institute of Biophysics, University of Regensburg, Germany
% Homepage: http://research.fabian.theis.name
%           http://www-aglang.uni-regensburg.de
%
% This file is free software, subject to the 
% GNU GENERAL PUBLIC LICENSE, see gpl.txt

%[r,s] = min(repmat(sum(d.^2,2),1,size(c,1))-2*d*c'+repmat(sum(c.^2,2)',size(d,1),1));
% very quick, very dirty

[m,v,e] = mfbox_voronoimap(newgrid',oldgrid');
[n,w,f] = mfbox_voronoimap(oldgrid',newgrid');
newdata = olddata(m);

if (length(unique(n))<length(n)) %average over candidates (TODO replace by accumarray)
    for i=1:length(newdata)
        p = find(n==i);
        if (length(p)>1)
            t = e{i};
            if (min(t(:))>0)
                t = 1./sqrt(t(:))
                newdata(i) = sum(olddata(p).*t)/sum(t(:));
            end
        end
    end
end

return