base (version 3.1.1)

capabilities: 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?

tiff

is the tiff function operational?

tcltk

is the tcltk package operational? unix Note that to make use of Tk you will almost always need to check that "X11" is also available.

unix X11Are the X11 graphics device and the X11-based data editor available? This loads the X11 module if not already loaded, and checks that the default display can be contacted unless a X11 device has already been used. aquaAre the R.app GUI components and the quartz function operational? Only on some OS X builds. Note that this is distinct from .Platform$GUI == "AQUA", which is true when using the Mac R.app GUI console. windows X11always FALSE on Windows. aquaFALSE except on OS X.

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?

fifo

are FIFO connections supported?

cledit

is command-line editing available in the current R session? This is false in non-interactive sessions. unix It will be true for the command-line interface if readline support has been compiled in and --no-readline was not used when R was invoked. (If --interactive was used, command-line editing will not actually be available.)

iconv

is internationalization conversion via iconv supported? Always true in current R.

NLS

is there Natural Language Support (for message translations)?

profmem

is there support for memory profiling? See tracemem.

cairo

is there support the svg, cairo_pdf and cairo_ps devices, and for type = "cairo" in the unix X11, bmp, jpeg, png, and tiff devices?

See Also

.Platform

Examples

capabilities()

if(!capabilities("http/ftp"))
   warning("internal download.file() is not available")

## See also the examples for 'connections'.