plot.quadratcount: Plot Quadrat Counts

In spatstat.geom: Geometrical Functionality of the 'spatstat' Family

Plot Quadrat Counts

Description

Given a table of quadrat counts for a spatial point pattern, plot the quadrats which were used, and display the quadrat count as text in the centre of each quadrat.

Usage

## S3 method for class 'quadratcount'
plot(x, ..., add = FALSE,
              entries=as.integer(t(x)), 
              dx = 0, dy = 0, show.tiles = TRUE,
              textargs = list())

Arguments

x	Object of class "quadratcount" produced by the function quadratcount.
...	Additional arguments passed to plot.tess to plot the quadrats.
add	Logical. Whether to add the graphics to an existing plot.
entries	Vector of numbers to be plotted in each quadrat. The default is to plot the quadrat counts.
dx, dy	Horizontal and vertical displacement of text relative to centroid of quadrat.
show.tiles	Logical value indicating whether to plot the quadrats.
textargs	List containing extra arguments passed to text.default to control the annotation.

Details

This is the plot method for the objects of class "quadratcount" that are produced by the function quadratcount. Given a spatial point pattern, quadratcount divides the observation window into disjoint tiles or quadrats, counts the number of points in each quadrat, and stores the result as a contingency table which also belongs to the class "quadratcount".

First the quadrats are plotted (provided show.tiles=TRUE, the default). This display can be controlled by passing additional arguments ... to plot.tess.

Then the quadrat counts are printed using text.default. This display can be controlled using the arguments dx,dy and textargs.

If entries is given, it should be a vector of length equal to the number of quadrats (the number of tiles in the tessellation as.tess(x)) containing integer or character values to be displayed in each quadrat, in the same sequence as tiles(as.tess(x)) or tilenames(as.tess(x)) or the counts in the transposed table t(x).

Value

Null.

Author(s)

\adrian

and \rolf

See Also

quadratcount, plot.tess, text.default, plot.quadrattest.

Examples

   plot(quadratcount(swedishpines, 5))

spatstat.geom documentation built on Sept. 18, 2024, 9:08 a.m.