wolffd@0: function data2 = cell2matPad(data)
wolffd@0: % data{f}(y,x,b) - each frame can have a different size (can can even be empty)
wolffd@0: % data2(y,x,b,f) = zero padded version
wolffd@0: 
wolffd@0: Nframes = length(data);
wolffd@0: Nbands = -inf;
wolffd@0: nr = -inf; nc = -inf;
wolffd@0: for f=1:Nframes
wolffd@0:   if isempty(data{f}), continue; end
wolffd@0:   nr = max(nr, size(data{f},1));
wolffd@0:   nc = max(nc, size(data{f},2));
wolffd@0:   Nbands = max(Nbands, size(data{f},3));
wolffd@0: end    
wolffd@0: data2 = zeros(nr, nc, Nbands, Nframes);
wolffd@0: for f=1:Nframes
wolffd@0:   if isempty(data{f}), continue; end
wolffd@0:   data2(1:size(data{f},1), 1:size(data{f},2), :, f) = data{f};
wolffd@0: end
wolffd@0: if Nbands == 1
wolffd@0:   data2 = squeeze(data2); % reshape(data2, [size(data2,1), size(data2,2), Nframes]);
wolffd@0: end
wolffd@0: