https://github.com/cran/fields
Tip revision: e6e2dec9c9cc857b2226614aaf6c6642000af53c authored by Doug Nychka on 06 February 2009, 00:00:00 UTC
version 5.02
version 5.02
Tip revision: e6e2dec
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)) )
}