Interface and language bindings to Tcl/Tk GUI elements.
This package provides access to the platform-independent Tcl scripting language and Tk GUI elements. See TkWidgets for a list of supported widgets, TkWidgetcmds for commands to work with them, and references in those files for more.
The Tcl/Tk documentation is in
the directory R_HOME/Tcl/doc.
the system man pages.
For a complete list of functions, use ls("package:tcltk").
Note that Tk will not be initialized if there is no DISPLAY
variable set, but Tcl can still be used. This is most useful to allow
the loading of a package which depends on tcltk in a session that
does not actually use it (e.g., during installation).