| [[.gmCgram {gmGeostats} | R Documentation |
Subsetting of gmCgram variogram structures
Description
Extraction or combination of nested structures of a gmCgram object
Usage
## S3 method for class 'gmCgram'
x[[i, ...]]
Arguments
x |
|
i |
indices of the structures that are desired to be kept (0=nugget) or removed (see details) |
... |
extra arguments for generic functionality |
Details
This function can be used to: extract the nugget (i=0), extract some
structures (i=indices of the structures, possibly including 0 for the nugget),
or filter some structures out (i=negative indices of the structures to remove;
nugget will always removed in this case). If you want to extract "slots" or
"elements" of the variogram, use the $-notation. If you want to extract variables of the
variogram matrices, use the [-notation. The contrary operation (adding structures together)
is obtained by summing (+) two gmCgram objects.
Value
a gmCgram variogram object with the desired structures only.
See Also
Other gmCgram functions:
[.gmCgram(),
as.function.gmCgram(),
as.gmCgram.variogramModelList(),
length.gmCgram(),
ndirections(),
plot.gmCgram(),
variogramModelPlot()
Examples
utils::data("variogramModels")
v1 = setCgram(type=vg.Gau, sill=diag(2), anisRanges = 3*diag(c(3,1)))
v2 = setCgram(type=vg.Exp, sill=0.3*diag(2), anisRanges = 0.5*diag(2))
vm = v1+v2
vm[[1]]