How can I extract the Z data from a figure created using the patch function?

Consider the following small example:

x=[0 1 0;1 1 0];

y=[0 0 1;0 1 1];

z=[0 1 0.5;1 0.5 0.5];

colormap(jet)
patch(x',y',z','FaceColor','interp','EdgeColor','interp');

Is there a way to read the z data on the graph with the data cursor (I know I can add a legend but I want to obtain the exact value of z at certain points, I also know that z will not be exact it's an approximation obtained by inteerpolation but yea you get the point)? It appears I can olny read the x and y coordinates of the points without the amplitude of z at that point. For example I can obtain the cordinates of the bottom left corner in the following picture but I can't know what is z I can only estimate it by adding a legend.

Answer 1

[Star Strider]

The code you posted does not actually create 'ZData':

hp = patch(x',y',z','FaceColor','interp','EdgeColor','interp');
xd = get(hp, 'XData')
yd = get(hp, 'YData')
zd = get(hp, 'ZData')

shows:

xd =
     0     1
     1     1
     0     0

yd =
     0     0
     0     1
     1     1

zd =
     []

If you also use:

     view(3)

you see that it is a plane, not a surface.