https://github.com/cran/fields
Tip revision: fd0fd2f186c7b6b0721880f6a0061ec076e1be79 authored by Douglas Nychka on 28 February 2015, 06:50:20 UTC
version 8.2-1
version 8.2-1
Tip revision: fd0fd2f
dyadic.2check.R
# fields, Tools for spatial data
# Copyright 2004-2013, Institute for Mathematics Applied Geosciences
# University Corporation for Atmospheric Research
# Licensed under the GPL -- www.gpl.org/licenses/gpl.html
dyadic.2check <- function(m, n, cut.p = 2) {
# checks that n is of the form
# n=p*2^m where p <= cut.p
m2 <- as.integer(m)
n2 <- as.integer(n)
while ((n2 > cut.p) & (m2 > cut.p)) {
if ((m2%%2 != 0) | (n2%%2 != 0)) {
cat(n, "and", m, "must equal p*2^L where p is less than or equal to ",
cut.p, fill = TRUE)
return(FALSE)
}
m2 <- m2/2
n2 <- n2/2
}
return(TRUE)
}