R: Plot a Spatial Quadrature Scheme

plot.quad {spatstat} | R Documentation

## Plot a Spatial Quadrature Scheme

### Description

Plot a two-dimensional spatial quadrature scheme.

### Usage

      ## S3 method for class 'quad'
    plot(x, ..., main, add=FALSE, dum=list(), tiles=FALSE)

### Arguments

`x` | The spatial quadrature scheme to be plotted. An object of class `"quad"`.
`...` | extra arguments controlling the plotting of the data points of the quadrature scheme.
`main` | text to be displayed as a title above the plot.
`add` | Logical value indicating whether the graphics should be added to the current plot if there is one (`add=TRUE`) or whether a new plot should be initialised (`add=FALSE`, the default).
`dum` | list of extra arguments controlling the plotting of the dummy points of the quadrature scheme. See below.
`tiles` | Logical value indicating whether to display the tiles used to compute the quadrature weights.

### Details

This is the `plot` method for quadrature schemes (objects of class `"quad"`, see `quad.object`).

First the data points of the quadrature scheme are plotted (in their observation window) using `plot.ppp` with any arguments specified in `...`

Then the dummy points of the quadrature scheme are plotted using `plot.ppp` with any arguments specified in `dum`.

By default the dummy points are superimposed onto the plot of data points. This can be overridden by including the argument `add=FALSE` in the list `dum` as shown in the examples. In this case the data and dummy point patterns are plotted separately.

See `par` and `plot.ppp` for other possible arguments controlling the plots.

### Value

`NULL`.

### Author(s)

Adrian Baddeley Adrian.Baddeley@curtin.edu.au

and Rolf Turner r.turner@auckland.ac.nz

### See Also

`quad.object`, `plot.ppp`, `par`

### Examples

       data(nztrees)
       Q <- quadscheme(nztrees)

       plot(Q, main="NZ trees: quadrature scheme")

       oldpar <- par(mfrow=c(2,1))
       plot(Q, main="NZ trees", dum=list(add=FALSE))
       par(oldpar)

[Package spatstat version 1.54-0 Index]