| [.gmCgram {gmGeostats} | R Documentation |
Subsetting of gmCgram variogram structures
Description
Extraction of some variables of a gmCgram object
Usage
## S3 method for class 'gmCgram'
x[i, j = i, ...]
Arguments
x |
|
i |
row-indices of the variables to be kept/removed |
j |
column-indices of the variables to be kept/removed (if only |
... |
extra arguments for generic functionality |
Details
This function can be used to extract the model for a a subset of variables.
If only i is specified, j will be taken as equal to i.
If you want to select all i's for certain j's or vice versa, give
i=1:dim(x$nugget)[1] and j= your desired indices, respectively
j=1:dim(x$nugget)[2] and i= your desired indices; replace x by the
object you are giving. If i!=j, the output will be a c("gmXCgram","gmCgram")
object, otherwise it will be a regular class "gmCgram" object.
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.
Value
a gmCgram variogram object with the desired variables 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[1,1]