nn, an R library which performs nearest neighbor interpolation.
Copyright 2016 James P. Howard, II
The computer code and data files on this web page are distributed under the BSD-2-Clause license.
nn is available in an R version.
pwiselinterp, an R library which finds the intercept and slope for a sequence of piecewise linear interpolants.
Original R code by James Howard; Modifications by John Burkardt.