r2gmt: Prepare Data for GMT

In arnima-github/gmt: Interface Between GMT Map-Making Software and R

Prepare Data for GMT

Description

This internal function reads data, from a filename or R object, and writes them to a GMT input file.

Usage

r2gmt(x, datafile, append=FALSE)

Arguments

x	data frame, matrix, or filename containing the data to be written to a temporary file.
datafile	filename where the data will be written in GMT format, tab-separated without header.
append	whether data should be appended to an existing file, separating segments with ">" lines.

Details

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.

Value

The data frame that was written to datafile.

Note

r2gmt is like write.table, except it allows x to be a filename, and appends tables with the GMT > separator.

It is mainly called by other functions, but users may find it useful for writing input data for GMT commands.

See Also

scan, read.table, write, write.table.

gmt-package gives an overview of the package.

Examples

LonLat1 <- data.frame(Lon=1:3, Lat=4:6)
LonLat2 <- data.frame(Lon=7:8, Lat=9:10)
## Not run: 
r2gmt(LonLat1, "temp.gmt")
r2gmt(LonLat2, "temp.gmt", append=TRUE)

## End(Not run)

arnima-github/gmt documentation built on April 21, 2023, 7:12 p.m.