gmt (version 1.0-0)

psxy: Add Lines/Symbols to GMT Map

Description

Call GMT to add lines/symbols to the active map and save in postscript format.

Usage

psxy(x, cmd="-JM -R -Scp -W2p -O -K", file=options("gmt.file"))

Arguments

x

data frame, matrix, or filename containing the data to be plotted

cmd

string of arguments passed to psxy

file

filename where the map is saved

Value

• Null, but the map is annotated and saved in postscript format. As a side product, a temporary file lastXY.gmt is saved in the working directory.

Details

The data are arranged in two (Lon, Lat) or more columns, depending on the -S argument. See the GMT documentation for details on psxy and other GMT commands.

References

Wessel, P. and W.H.F. Smith. 2004. The Generic Mapping Tools: Technical reference and cookbook. Version 4. Available at http://gmt.soest.hawaii.edu/gmt/doc/pdf/GMT$\_$Docs.pdf.

See Also

gmt initializes the GMT session, pscoast draws a map, psxy, pstext and psbar annotate the map, and psclose finalizes the postscript file. See r2gmt for valid data file format when argument x is a filename.

Examples

gmt(demo.par)
pscoast(demo.coast)
psxy(demo.xy)
pstext(demo.text)
psbar(demo.bar, ref=64)
psclose()