R: FORTRAN subroutines used in fields functions

fields exported FORTRAN {fields} | R Documentation

## FORTRAN subroutines used in fields functions

### Description

These functions implement cubic smoothing splines and also provide some basic computations for radial basis functions. All are called using the `.FORTRAN` interface.

### Details

For these low level FORTRAN subroutines refer to the R functions for the calling sequence and to the src subdirectory of the fields pacakage for the source code.

css

  Cubic smoothing spline see `sreg` and `splint`

ddfind

  Finds nearest neighbor points within a fixed distance. See `fields.rdist.near`

dmaket

  Creates matrix of all polynomial terms up to fixed order. See `fields.mkpoly`

evlpoly

  evaluates a univariate polynomial. See codefields.evlpoly

evlpoly2

  evaluates a multivariate polynomial. See codefields.evlpoly2

inpoly

  Determine which 2-d locations are within a polynomial. see `in.poly`

igpoly

  Determine which 2-d grid points locations are within a polynomial. see `in.poly.grid`

multeb

  Multiply an exponential cross covariance matrix by another matrix. See `exp.cov`

multrb

  Multiply an radial basis function matrix by another matrix. See `rad.cov`

radbas

  Evaluates radial basis functions. See `rdist.R`

rcss

  Robust cubic smoothing spline. See `qsreg`

[Package fields version 9.6.1 Index]