spatstat.geom (version 2.1-0)

unstack.ppp: Separate Multiple Columns of Marks

Description

Given a spatial pattern with several columns of marks, take one column at a time, and return a list of spatial patterns each having only one column of marks.

Usage

# S3 method for ppp
unstack(x, …)
# S3 method for psp
unstack(x, …)
# S3 method for tess
unstack(x, …)

Arguments

x

A spatial point pattern (object of class "ppp") or a spatial pattern of line segments (object of class "psp") or a spatial tessellation (object of class "tess").

…

Ignored.

Value

A list, of class "solist", whose entries are objects of the same type as x.

Details

The functions defined here are methods for the generic unstack. The functions expect a spatial object x which has several columns of marks; they separate the columns, and return a list of spatial objects, each having only one column of marks.

If x has several columns of marks (i.e. marks(x) is a matrix, data frame or hyperframe with several columns), then y <- unstack(x) is a list of spatial objects, each of the same kind as x. The jth entry y[[j]] is equivalent to x except that it only includes the jth column of marks(x).

If x has no marks, or has only a single column of marks, the result is a list consisting of one entry, which is x.

See Also

unstack

unstack.msr

See also methods for the generic split such as split.ppp.

Examples

# NOT RUN {
   finpines
   unstack(finpines)
# }