spatstat (version 1.29-0)

Extract.lpp: Extract Subset of Point Pattern on Linear Network

Description

Extract a subset of a point pattern on a linear network.

Usage

## S3 method for class 'lpp':
[(x, i, ...)

Arguments

x
A point pattern on a linear network (object of class "lpp").
i
Subset index. A valid subset index in the usual Rsense, indicating which points should be retained.
...
Ignored.

Value

  • A point pattern on a linear network (of class "lpp").

Details

This function extracts a designated subset of a point pattern on a linear network.

The function [.lpp is a method for [ for the class "lpp". It extracts a designated subset of a point pattern. The argument i should be a subset index in the usual Rsense: either a numeric vector of positive indices (identifying the points to be retained), a numeric vector of negative indices (identifying the points to be deleted) or a logical vector of length equal to the number of points in the point pattern x. In the latter case, the points (x$x[i], x$y[i]) for which subset[i]=TRUE will be retained, and the others will be deleted. Use the function unmark to remove marks from a marked point pattern.

See Also

lpp

Examples

Run this code
# Chicago crimes data - remove cases of assault
  chicago[marks(chicago) != "assault"]

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