R: Graphics

polymap {splancs} | R Documentation

## Graphics

### Description

Plots point and polygon data sets on the current graphics device.

### Usage

    polymap(poly,add=FALSE,xlab="",ylab="",axes=TRUE, asp,...)

### Arguments

`poly` | a polygon.
`add` | if FALSE, start a new plot. If TRUE, superimpose on current plot.
`xlab,ylab` | Label strings for x and y axes.
`axes` | if true, display axes with labelling. If false, do not display any axes on the plot.
`asp` | aspect parameter for plot
`...` | Graphical arguments may be entered, and these are passed to the standard S `points` and `polygon` routines.

### Details

The specified data set is plotted on the current graphics device, either as points or polygons. For `polymap`, the last point in the data set is drawn connected to the first point. `pointmap` and `polymap` preserve the aspect ratio in the data by using the `asp=1` plot argument. Graphical parameters can also be supplied to these routines, and are passed through to `plot`. Some useful parameters include `pch` to change the plotting character for points, `lty` to change the line type for polygons, and `type="n"` to just set up axes for the plot without plotting anything.

### References

Rowlingson, B. and Diggle, P. 1993 Splancs: spatial point pattern analysis code in S-Plus. Computers and Geosciences, 19, 627-655; the original sources can be accessed at: http://www.maths.lancs.ac.uk/~rowlings/Splancs/. See also Bivand, R. and Gebhardt, A. 2000 Implementing functions for spatial statistical analysis using the R language. Journal of Geographical Systems, 2, 307-317.

### See Also

`par`, `mpoint`

### Examples

    data(bodmin)
    plot(bodmin$poly, asp=1, type="n")
    pointmap(as.points(bodmin), add=TRUE)
    polymap(bodmin$poly, add=TRUE)

[Package splancs version 2.01-40 Index]