Interpolation of Irregularly and Regularly Spaced Data
Description
Several cubic spline interpolation methods of H. Akima for irregular and
regular gridded data are available through this package, both for the bivariate case
(irregular data: ACM 761, regular data: ACM 760) and univariate case (ACM 433 and ACM 697).
Linear interpolation of irregular gridded data is also covered by reusing D. J. Renkas
triangulation code which is part of Akimas Fortran code. A bilinear interpolator
for regular grids was also added for comparison with the bicubic interpolator on
regular grids.