MATLAB 4D (3d   color) plot with animation
X=1:30;Y=randperm(30);Z=ones(size(X));
voltage_matrix = ...; %# 30 by 133
cdata = voltage_matrix;
handle = scatter3(X,Y,Z);

colormap('jet')
set(gca,'clim',[min(voltage_matrix) max(voltage_matrix)])

for t=1:size(cdata,2) %# 1 to 133
    set(handle, 'cdata', cdata(:,t));
    pause(.1)
end