org.apache.commons.math.analysis.interpolation
Interfaces 
BivariateRealGridInterpolator
MultivariateRealInterpolator
UnivariateRealInterpolator
Classes 
BicubicSplineInterpolatingFunction
DividedDifferenceInterpolator
LoessInterpolator
MicrosphereInterpolatingFunction
MicrosphereInterpolator
NevilleInterpolator
SmoothingBicubicSplineInterpolator
SplineInterpolator