select.list {utils} | R Documentation |
Select item(s) from a character vector.
select.list(list, preselect = NULL, multiple = FALSE, title = NULL)
list |
a character vector of items. |
preselect |
a character vector, or NULL . If non-null and
if the string(s) appear in the list, the item(s) are selected
initially. |
multiple |
logical: can more than one item be selected? |
title |
optional character string for window title, or
NULL for no title. |
Under the Mac OS X GUI this brings up a modal dialog box with a (scrollable) list of items, which can be selected by the mouse.
Otherwise it displays a text list from which the user can choose by
number(s). The multiple = FALSE
case uses menu
.
Preselection is only supported for multiple = TRUE
, where it is
indicated by a "+"
preceding the item.
It is an error to use select.list
in a non-interactive session.
A character vector of selected items. If multiple
is false and
no item was selected (or Cancel
was used), ""
is
returned. If multiple
is true and no item was selected (or
Cancel
was used) then a character vector of length 0 is returned.
menu
, tk_select.list
for a graphical
version using Tcl/Tk.
## Not run: select.list(sort(.packages(all.available = TRUE))) ## End(Not run)