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'.