Interpolation
One-dimensional interpolation.
One-dimensional linear interpolation without error checking.
Fourier interpolation.
Returns the cubic spline interpolation of Y at the point X.
Lookup values in a sorted table.
Two-dimensional interpolation.
Perform 3-dimensional interpolation.
Perform N-dimensional interpolation, where N is at least two.
Return a matrix ZI corresponding to the bicubic interpolations at XI
and YI of the data supplied as X, Y and Z.