https://github.com/cran/fields
Tip revision: 994a12895da8b17d7b3b6ab49f0ffdaa71a34e76 authored by Douglas Nychka on 17 May 2021, 15:20:06 UTC
version 12.3
version 12.3
Tip revision: 994a128
rdistC.c
/*
c**** # fields is a package for analysis of spatial data written for
c**** # the R software environment .
c**** # Copyright (C) 2018
c**** # University Corporation for Atmospheric Research (UCAR)
c**** # Contact: Douglas Nychka, nychka@ucar.edu,
c**** # National Center for Atmospheric Research, PO Box 3000, Boulder, CO 80307-3000
c**** #
c**** # This program is free software; you can redistribute it and/or modify
c**** # it under the terms of the GNU General Public License as published by
c**** # the Free Software Foundation; either version 2 of the License, or
c**** # (at your option) any later version.
c**** # This program is distributed in the hope that it will be useful,
c**** # but WITHOUT ANY WARRANTY; without even the implied warranty of
c**** # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
c**** # GNU General Public License for more details.
*/
#include <R.h>
#include <Rinternals.h>
#include <R_ext/Arith.h>
#include <Rmath.h>
#include <float.h>
SEXP Rdist1C(SEXP x)
{
int nx = nrows(x);
int dim = ncols(x);
void F77_CALL(rdist1)(int *, double *, int *, double *);
SEXP ans = PROTECT(allocMatrix(REALSXP, nx, nx));
double *rx = REAL(x), *rans = REAL(ans);
/* rdist1_( &dim, rx, &nx, rans); */
F77_CALL(rdist1)( &dim, rx, &nx, rans);
UNPROTECT(1);
return ans;
}
SEXP RdistC(SEXP x1, SEXP x2)
{
int n1 = nrows(x1);
int n2 = nrows(x2);
int dim = ncols(x1);
void F77_CALL(rdist)(int *, double *, int *, double *, int *, double *);
SEXP ans = PROTECT(allocMatrix(REALSXP, n1, n2));
double *rx1 = REAL(x1),*rx2 = REAL(x2), *rans = REAL(ans);
F77_CALL(rdist)( &dim, rx1, &n1, rx2, &n2, rans);
UNPROTECT(1);
return ans;
}