capabilities {base} | R Documentation |
Report Capabilities of this Build of R
Description
Report on the optional features which have been compiled into this
build of R.
Usage
capabilities(what = NULL)
Arguments
what |
character vector or NULL , specifying
required components. NULL implies that all are required. |
Value
A named logical vector. Current components are
jpeg |
Is the jpeg function operational? |
png |
Is the png function operational? |
tcltk |
Is the tcltk package operational? |
X11 |
(Unix) Are X11 and the data editor available? |
libz |
Is gzfile available? |
http/ftp |
Are url and the internal method for
download.file available? |
sockets |
Are make.socket and related functions
available? |
libxml |
Is there support for integrating libxml with
the R event loop? |
cledit |
Is command-line editing available in the current R
session? This is false in non-interactive sessions.
|
See Also
.Platform
Examples
capabilities()
if(!capabilities("http/ftp"))
warning("internal download.file() is not available")
## See also the examples for `connections'.