akima	Waveform Distortion Data for Bivariate Interpolation 
interp	Gridded Bivariate Interpolation for Irregular Data 
interp.new	Gridded Bivariate Interpolation for Irregular Data 
interp.old	Gridded Bivariate Interpolation for Irregular Data 
interpp	Pointwise Bivariate Interpolation for Irregular Data 
interpp.new	Pointwise Bivariate Interpolation for Irregular Data 
interpp.old	Pointwise Bivariate Interpolation for Irregular Data 
