R: Panel Plots using Colour Image or Contour Lines

panel.contour {spatstat.core} | R Documentation

## Panel Plots using Colour Image or Contour Lines

### Description

These functions can be passed to `pairs` or `coplot` to determine what kind of plotting is done in each panel of a multi-panel graphical display.

### Usage

    panel.contour(x, y, ..., sigma = NULL)

    panel.image(x, y, ..., sigma = NULL)

    panel.histogram(x, ...)

### Arguments

`x,y` | Coordinates of points in a scatterplot.
`...` | Extra graphics arguments, passed to `contour.im`, `plot.im` or `rect`, respectively, to control the appearance of the panel.
`sigma` | Bandwidth of kernel smoother, on a scale where x and y range between 0 and 1.

### Details

These functions can serve as one of the arguments `panel`, `lower.panel`, `upper.panel`, `diag.panel` passed to graphics commands like `pairs` or `coplot`, to determine what kind of plotting is done in each panel of a multi-panel graphical display. In particular they work with `pairs.im`.

The functions `panel.contour` and `panel.contour` are suitable for the off-diagonal plots which involve two datasets `x` and `y`. They first rescale `x` and `y` to the unit square, then apply kernel smoothing with bandwidth `sigma` using `density.ppp`. Then `panel.contour` draws a contour plot while `panel.image` draws a colour image.

The function `panel.histogram` is suitable for the diagonal plots which involve a single dataset `x`. It displays a histogram of the data.

### Value

Null.

### Author(s)

Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner r.turner@auckland.ac.nz and Ege Rubak rubak@math.aau.dk.

### See Also

`pairs.im`, `pairs.default`, `panel.smooth`

### Examples

      pairs(bei.extra,
            panel      = panel.contour,
            diag.panel = panel.histogram)
      with(bei.extra,
            pairs(grad, elev,
                  panel      = panel.image,
                  diag.panel = panel.histogram))
      pairs(marks(finpines), panel=panel.contour, diag.panel=panel.histogram)

[Package spatstat.core version 2.0-0 Index]