Extract.quad

0th

Percentile

Subset of Quadrature Scheme

Extract a subset of a quadrature scheme.

Keywords
manip, spatial
Usage
## S3 method for class 'quad':
[(x, ...)
Arguments
x
A quadrature scheme (object of class "quad").
...
Arguments passed to [.ppp to determine the subset.
Details

This function extracts a designated subset of a quadrature scheme.

The function [.quad is a method for [ for the class "quad". It extracts a designated subset of a quadrature scheme.

The subset to be extracted is determined by the arguments ... which are interpreted by [.ppp. Thus it is possible to take the subset consisting of all quadrature points that lie inside a given region, or a subset of quadrature points identified by numeric indices.

Value

  • A quadrature scheme (object of class "quad").

See Also

quad.object, [.ppp.

Aliases
  • [.quad
  • [<-.quad
Examples
data(nztrees)
 Q <- quadscheme(nztrees)
 W <- owin(c(0,148),c(0,95)) # a subwindow
 Q[W]
Documentation reproduced from package spatstat, version 1.17-1, License: GPL (>= 2)

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