https://github.com/cran/fields
Tip revision: c8904131c3352e1d3ff03bb5c07f5434648cc406 authored by Doug Nychka on 17 November 2011, 11:25:44 UTC
version 6.6.2
version 6.6.2
Tip revision: c890413
evlpoly2.R
# fields, Tools for spatial data
# Copyright 2004-2011, Institute for Mathematics Applied Geosciences
# University Corporation for Atmospheric Research
# Licensed under the GPL -- www.gpl.org/licenses/gpl.html
fields.evlpoly2 <- function(x, coef, ptab) {
# evaluates polynomial at x values with coefficients coef[i] and powers i-1
#
n <- nrow(x)
nd <- ncol(x)
J <- nrow(ptab)
if (length(coef) != J) {
stop("coefficients not same length as ptab rows")
}
results <- rep(0, n)
temp <- .Fortran("evlpoly2", x = as.double(x), n = as.integer(n),
nd = as.integer(nd), ptab = as.integer(ptab), j = as.integer(J),
coef = as.double(coef), results = as.double(results)
)$results
return(temp)
}