menu {utils}R Documentation

Menu Interaction Function


menu presents the user with a menu of choices labelled from 1 to the number of choices. To exit without choosing an item one can select 0.


menu(choices, graphics = FALSE, title = "")


choices a character vector of choices
graphics a logical indicating whether a graphics menu should be used if available.
title a character string to be used as the title of the menu. NULL is also accepted.


If graphics = TRUE and a windowing system is available (Windows, MacOS X or X11 via Tcl/Tk) a listbox widget is used, otherwise a text menu.

Ten or fewer items will be displayed in a single column, more in multiple columns if possible within the current display width.

No title is displayed if title is NULL or "".


The number corresponding to the selected item, or 0 if no choice was made.


Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.

See Also

select.list, which is used to implement the graphical menu, and allows multiple selections.


## Not run: 
switch(menu(c("List letters", "List LETTERS")) + 1,
       cat("Nothing done\n"), letters, LETTERS)
## End(Not run)

[Package utils version 2.1.0 Index]