R: Plot Quadrat Counts

plot.quadratcount {spatstat.geom} | R Documentation

## 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.vector(t(as.table(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`.

### Value

Null.

### Author(s)

Adrian Baddeley Adrian.Baddeley@curtin.edu.au

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

### See Also

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

### Examples

       plot(quadratcount(swedishpines, 5))

[Package spatstat.geom version 2.3-2 Index]