r2gmt function

Prepare Data for GMT

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

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.

Returns

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)