The pull-down menus in limmaGUI are defined in limmaGUI-menus.txt in the etc
subdirectory of the limmaGUI package installation. To find out exactly where this directory
is on your computer, you can paste the following into R:
system.file("etc",package="limmaGUI")
R source files can be added to this etc directory (and must have extension .R).
Try uncommenting (i.e. removing the # from) the histogram menu item in limmaGUI-menus.txt
to enable the histogram command in the plot menu.
You can add as many menu items as you wish.
The reason that the histogram example plots the graph in the standard R graphics device rather than in a Tk
window is simply to keep this example brief and avoid calling tkrplot. Generally graphs are plotted
in Tk windows and users of the Windows operating system can keep their main RGui window minimized while they
run limmaGUI.