spatstat (version 1.6-2)

subset.fv: Extract Subset of Function Values

Description

Extract a subset of an object of class "fv".

Usage

subset.fv(x, i, j, drop=FALSE)
  x[i, j]

Arguments

x

a function value object, of class "fv" (see fv.object). Essentially a data frame.

i

any appropriate subset index. Selects a subset of the rows of the data frame, i.e. a subset of the domain of the function(s) represented by x.

j

any appropriate subset index for the columns of the data frame. Selects some of the functions present in x.

...

Ignored - this argument is required for consistency with other methods for "[".

drop

Ignored - this argument is required for consistency with other methods for "[".

Value

• A function value object (of class "fv").

synopsis

subset.fv(x, i, j, ..., drop=FALSE)

Details

This is a method for "[" for the class "fv". It is very similar to [.data.frame except for a few extra checks on the sanity of the result.

See Also

fv.object

Examples

data(cells)
 K <- Kest(cells)

 # discard the estimates of K(r) for r  > 0.1
 Ksub <- K[K$r <= 0.1, ]

 # discard the border method estimator
 Ksub <- K[ , names(K) != "border"]