| file.show {base} | R Documentation |
Display one or more files.
file.show(..., header = rep("",nfiles), title = "R Information",
delete.file=FALSE, pager=getOption("pager"))
... |
one or more character vectors containing the names of the files to be displayed. |
header |
character vector (of the same length as the number of files
specified in ...) giving a header for each file being
displayed. Defaults to empty strings. |
title |
an overall title for the display. If a single separate
window is used for the display, title will be used as the window
title. If multiple windows are used, their titles should combine the title
and the file-specific header. |
delete.file |
should the files be deleted after display? Used for temporary files. |
pager |
the pager to be used. |
This function provides the core of the R help system, but it can be used for other purposes as well.
How the pager is implemented is highly system dependent.
The basic Unix version concatenates the files (using the headers) to a
temporary file, and displays it in the
pager selected by the pager argument, which is a character
vector specifying a system command to run on the set of files.
Most GUI systems will use a separate pager window for each file,
and let the user leave it up while R
continues running. The selection of such pagers could either be done
using “magic” pager names being intercepted by lower-level code
(such as "internal" and "console" on Windows), or
by letting pager be an R function which will be called with the
same arguments as file.show and take care of interfacing to the
GUI.
Not all implementations will honour delete.file.
In particular, using an external pager on Windows does not, as there
is no way to know when the external application has finished with
the file.
Ross Ihaka, Brian Ripley.
files,
list.files,
help.
file.show(file.path(R.home("doc"), "COPYRIGHTS"))