How to plot a transient response using scatter interpolant?

I've used the following code to plot a 2D surface plot of the steady state pressure distribution on a square surface.

figure;

yi=0:5:175;

zi=0:5:440;

[Yi,Zi]=meshgrid(yi,zi);

P=scatteredInterpolant(y1335_complete,z,Cp_rear_complete, 'natural', 'linear');

Pi=P(Yi,Zi);

pcolor(Yi,Zi,Pi)

shading interp

colorbar Eastoutside

caxis([-0.3, 0.1])

hold on

plot(y1335_complete,z,'.k')

title ('Rear of the Train')

Now that I have instantaneous pressure distribution at every 0.002 of a second. How do I do a transient plot where the 2D contour will change according to time?