Interpolation contour map: Based on Z1( x1, y1), Z2( x2,y2), to interpolate Z3(x3,y3)

[#1]

Jmp has a contour map to use certain algorithm to interpolate results, based on Z1( x1, y1), Z2( x2,y2) to calculate Z3 (x3,y3).

For example below 3 column, if we know the x,y, and its corresponding height, how can we calculate the height at (2,2)?

Is there a script for doing this type of interpolation?

Thanks

X, Y, Height

1,1, 10

1,2,32

1,3, 13

2,1,23

2,2, ??

2,3, 44

3,1,23

3,2,11

3,3,42

[#2]

Cross section of a 2D plot  might have some useful answers.