| pstext {gmt} | R Documentation |
Add Text/Symbols to GMT Map
Description
Call GMT to add text/symbols to a map and save in postscript format.
Usage
pstext(x, cmd="-J -R -O -K", file=getOption("gmt.file"))
Arguments
x |
data frame, matrix, or filename containing the data to be plotted. |
cmd |
string of arguments passed to GMT shell command
|
file |
filename where the map is saved. |
Details
The cmd argument can be used to specify the data columns:
Format (cmd) | Data columns | Notes |
-J -R -O -K | Lon Lat Text | (default) |
-J -R -F+f+a+j -O -K |
Lon Lat Font Angle Justify Text | (see example) |
If x is a filename, the data should be tabular with or without
a header, separated by commas or whitespace. The first line is
interpreted as header if the first non-whitespace character is not
minus, point, or number.
See the GMT documentation for details on pstext and other
GMT commands.
Value
NULL, but the map is annotated and saved in postscript format.
The temporary GMT input file ‘text.gmt’ is saved in directory
dirname(tempdir()), for the user to view or edit. It is later
removed by psclose().
See Also
Similar to text and postscript in native
R graphics.
gmt, pscoast, psxy,
pstext, psbar, and psclose work
together to draw maps.
gmt-package gives an overview of the package.
Examples
## Not run:
# Draw map and save as "map.ps" in current working directory
gmt(demo.par)
pscoast(demo.coast)
psxy(demo.xy)
pstext(demo.text, "-J -R -F+f+a+j -O -K")
psbar(demo.bar, ref=66)
psclose()
# See directory gmt/example for details
## End(Not run)