how to add contour into a scatter3 plot

Hello everybody

please check my attached file.I have the top left figure and I want to add contour to it like the right figure. I also add my code to plot the left figure, I could not add contour to it by contour3(d.X(:),d.Y(:),d.Dz(:),30); to it. I put my variable list at the bottom of the same file.

I would appreciate all you comments.

Thank you very much