Daniel@0: function [tmp y] = gettmp(x,y)
Daniel@0: 
Daniel@0: idx = get(x,'TmpIdx')+1;
Daniel@0: tmps = get(x,'InterChunk');
Daniel@0: if idx > length(tmps)
Daniel@0:     tmp = [];
Daniel@0: else
Daniel@0:     tmp = tmps{idx};
Daniel@0: end
Daniel@0: if nargin<2
Daniel@0:     y = x;
Daniel@0: end
Daniel@0: y = set(y,'InterChunk',tmps,'TmpIdx',idx);