Changes in version 2.0.3 (2022-06-06)                  

  - Improved deg2num() and num2deg() so they handle NA values.

  - Added modern.sh script, demonstrating GMT modern mode.

                 Changes in version 2.0.2 (2020-11-23)                  

  - Maintenance release.

                 Changes in version 2.0-1 (2017-09-11)                  

  - Removed importing of unnecessary packages.

                 Changes in version 2.0-0 (2017-06-20)                  

  - Adapted package to GMT version 5.

  - Changed psclose() so it does not alter bounding box declarations or
    remove configuration and history files.

                 Changes in version 1.2-0 (2014-03-12)                  

  - Added NAMESPACE file.

  - Changed example to A4 paper.

                 Changes in version 1.1-9 (2012-10-29)                  

  - Changed -M to -m in psbar.

                 Changes in version 1.1-3 (2009-04-21)                  

  - Updated URL of GMT manual.

                 Changes in version 1.1-1 (2007-08-02)                  

  - Improved psxy(), pstext(), and psclose() so they no longer expect a
    Mercator-projected map, but any kind of map.

  - Simplified gmt.system(), thanks to improved system() in R 2.5.0.

                 Changes in version 1.1-0 (2007-07-30)                  

  - Added function num2deg() to convert numeric to degrees, the opposite
    of deg2num().

  - Changed gmt() so quiet=TRUE by default, and files .gmtcommands4 and
    .gmtdefaults4 are created in dirname(file) instead of R working
    directory.

  - Changed psxy(), pstext(), and psbar() so temporary GMT input files
    are saved directory dirname(tempdir()) instead of R working
    directory. These temporary files are later removed by psclose().

  - Changed psclose() so the bounding box declaration is moved to the
    postscript file header, and GMT input files are removed from
    temporary directory. If cleanup=TRUE, the files .gmtcommands4 and
    .gmtdefaults4 are also removed.

  - Improved r2gmt() to support # commented table header.

  - Added scripts example.bat and example.sh that mimic the behaviour of
    the 'gmt' package.

  - Improved help page examples.

                 Changes in version 1.0-3 (2005-10-19)                  

  - Improved help pages.

                 Changes in version 1.0-2 (2005-10-03)                  

  - Added function gmt.system() to handle the interface between R and
    system commands, passing invisible=TRUE on operating systems that
    support that argument.

                 Changes in version 1.0-1 (2005-10-02)                  

  - Improved performance by changing approach from shell("cmd>file") to
    ps<-system("cmd");writeLines(ps,file). Demo runs four times faster.

                 Changes in version 1.0-0 (2005-09-28)                  

  - Added help pages for all functions.

  - Submitted to CRAN.

                        Changes in version 0.9-1                        

  - Added argument 'ref' to psbar() to standardize bar height.

  - Added function gmt() to initialize GMT session, making .gmthome(),
    gmtdefaults, and gmtset() obsolete. The package assumes that
    binaries are in the PATH and GMTHOME is defined.

  - Added function r2gmt() to write GMT input files, making .data2gmt()
    and .file2gmt() obsolete.

                        Changes in version 0.9-0                        

  - Added functions .data2gmt(), .file2gmt(), .gmthome(), deg2num(),
    geodist(), gmt(), gmtdefaults(), gmtset(), psbar(), psclose(),
    pscoast(), pstext(), and psxy().

  - Added example objects demo.bar, demo.coast, demo.set, demo.text, and
    demo.xy.