How to get values of W(x,y) from the function contour(x,y,W,1000) ?

[Prof M. N. Anandaram]

Hello anybody:

I am using the Octave function contour(x,y,W(x,y), 1000) to good effect but do not know
which command to use to print out all the contoured values of W(x,y) in the |x|, |y| field.

Of course I supply a large matrix of W and a corresponding meshgrid(x,y) to the contour() command.
But I want to have the values of W used only for the contours that are plotted in the given region.

Can anyone tell me how?

Thanks in advance.
Anandaram