`pointmap.Rd`

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

`pointmap(pts,add=FALSE,axes=TRUE,xlab="",ylab="", asp,...)`

- pts
a points data set.

- add
if FALSE, start a new plot. If TRUE, superimpose on current plot.

- axes
if true, display axes with labelling. If false, do not display any axes on the plot.

- xlab,ylab
Label strings for x and y axes.

- asp
aspect parameter for plot

- ...
Graphical arguments may be entered, and these are passed to the standard S

`points`

and`polygon`

routines.

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 set up axes for the plot without plotting anything.

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: https://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.