Hi,
The Surface object has a Parent property which points to the Axes object of the original figure. The key trick here is to copy the Surface graphics object and assign it a new parent; the function copyobj provides this functionality. In order to copy it to a new figure this empty figure needs an empty Axes object as well. A simple example follows:
[X, Y] = meshgrid(1:100, 1:100);
Z = rand(100,100);
oldfigh = figure; h1 = surf(X, Y, Z);
newfigh = figure;
newfigh.CurrentAxes = axes;
h2 = copyobj(h1, newfigh.CurrentAxes);
Note that this does not copy the Axes properties of the original figure (i.e. limits, view, color, etc.). If you have access to the original figure handle you can copy its Axes using the same function, which includes the Child Surface object:
clear;
[X, Y] = meshgrid(1:100, 1:100);
Z = rand(100,100);
oldfigh = figure; h1 = surf(X, Y, Z);
newfigh = figure;
copyobj(oldfigh.CurrentAxes, newfigh)
