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
as.surface.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
"as.surface" <- function(obj, z, order.variables = "xy") {
#
if (is.list(obj)) {
grid.list <- obj
}
if (is.matrix(obj)) {
grid.list <- attr(obj, "grid.list")
}
#
# OK now have a grid, parse this to figure
# nx and ny the x and y sequences and extract names
#
hold <- parse.grid.list(grid.list, order.variables = "xy")
#
# note that coercing z to a matrix is just reformatting
# using the standard ordering.
#
# output list is all the grid stuff and the matrix z.
c(hold, list(z = matrix(z, ncol = hold$ny, nrow = hold$nx)))
}