To reflect a contour plot

I have my potential surface plot. I want to reflect it and plot the effective potential (contour plot). My code to plot the potential surface is simple:

load Voltage.dat
V=Voltage;
clear Voltage;
V=double(V);   % V is now 245x52 double
figure, contour(V,500);

My device is having mirror symmetry. This is only the potential plot for the one half. How can I take the reflection of this contour plot and make a new plot including the mirror reflection?

Answer 1

[Roger Stafford]

If your symmetry is in the left-right direction, then do:

   contour(V(:,end:-1:1),500);

However, that leaves the two images overlapping. To avoid this you will need to use the

   contour(X,Y,Z)

form appropriately. That is, reverse the Z second index as above, and shift X to one side in the appropriate manner.