Duncan Temple Lang, Deborah F. Swayne
GGobi meets R: an extensible environment for interactive dynamic
data visualization
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GGobi is a direct descendant of XGobi, designed so that it can be
embedded in other software and controlled using an API
(application programming interface).  This design has been
developed and tested in partnership with R.  When GGobi is used
with R, the result is a full marriage between GGobi's direct
manipulation graphical environment and R's familiar extensible
environment for statistical data analysis.