R: Display the result of a quadrat counting test.

plot.quadrattest {spatstat} | R Documentation

## Display the result of a quadrat counting test.

### Description

Given the result of a quadrat counting test, graphically display the quadrats that were used, the observed and expected counts, and the residual in each quadrat.

### Usage

     ## S3 method for class 'quadrattest'
    plot(x, ..., textargs=list())

### Arguments

`x` | Object of class `"quadrattest"` containing the result of `quadrat.test`.
`...` | Additional arguments passed to `plot.tess` to control the display of the quadrats.
`textargs` | List of additional arguments passed to `text.default` to control the appearance of the text.

### Details

This is the plot method for objects of class `"quadrattest"`. Such an object is produced by `quadrat.test` and represents the result of a chi^2 test for a spatial point pattern.

The quadrats are first plotted using `plot.tess`. Then in each quadrat, the observed and expected counts and the Pearson residual are displayed as text using `text.default`. Observed count is displayed at top left; expected count at top right; and Pearson residual at bottom.

### Value

Null.

### Author(s)

Adrian Baddeley Adrian.Baddeley@curtin.edu.au

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

### See Also

`quadrat.test`, `plot.tess`, `text.default`, `plot.quadratcount`

### Examples

       plot(quadrat.test(swedishpines, 3))

[Package spatstat version 1.63-3 Index]