Extract a subset of a quadrature scheme.
# S3 method for quad
[(x, ...)A quadrature scheme (object of class "quad").
A quadrature scheme (object of class "quad").
Arguments passed to [.ppp to determine the
subset.
Adrian Baddeley Adrian.Baddeley@curtin.edu.au and Rolf Turner rolfturner@posteo.net
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.
quad.object,
[.ppp.
Q <- quadscheme(nztrees)
W <- owin(c(0,148),c(0,95)) # a subwindow
Q[W]
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