R: Report Capabilities of this Build of R

capabilities {base}

R Documentation

Report Capabilities of this Build of R

Report on the optional features which have been compiled into this build of R.

capabilities(what = NULL)

what

character vector or NULL, specifying required components. NULL implies that all are required.

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?

`X11`	always `FALSE` on Windows.
`aqua`	`FALSE` except on Mac 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.
`iconv`	is internationalization conversion via `iconv` supported? Always true as from R 2.10.0.
`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 `bmp`, `jpeg`, `png`, and `tiff` devices?

capabilities()

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

## See also the examples for 'connections'.

[Package base version 2.15.1 Index]