https://github.com/cran/fields
Tip revision: 8eab500c3dad2103092ff68706417414fe53e16b authored by Doug Nychka on 22 September 2009, 20:23:49 UTC
version 6.01
version 6.01
Tip revision: 8eab500
quilt.plot.R
# fields, Tools for spatial data
# Copyright 2004-2007, Institute for Mathematics Applied Geosciences
# University Corporation for Atmospheric Research
# Licensed under the GPL -- www.gpl.org/licenses/gpl.html
"quilt.plot" <- function(x, y, z, nrow = 64, ncol = 64,
grid = NULL, add.legend = TRUE, add = FALSE, col = tim.colors(256),
...) {
x <- as.matrix(x)
if (ncol(x) == 2) {
z <- y
}
if (ncol(x) == 1) {
x <- cbind(x, y)
}
if (ncol(x) == 3) {
z <- x[, 3]
x <- x[, 1:2]
}
# at this point x should be a 2 column matrix of x-y locations
# z is a vector or one column matrix of the z values.
#discretize data
out.p <- as.image(z, x = x, nrow = nrow, ncol = ncol, na.rm = TRUE)
#plot it
if (add.legend) {
image.plot(out.p, col = col, add = add, ...)
}
else {
image(out.p, col = col, add = add, ...)
}
}