capabilities              package: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 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.

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. It will be true
          for the command-line interface if 'readline' support has been
          compiled in and '--no-readline' was _not_ invoked. 

   iconv: is internationalization conversion via 'iconv' supported?

     NLS: is there Natural Language Support (for message translations)?

 profmem: is there support for memory profiling?

See Also:

     '.Platform'

Examples:

     capabilities()

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

     ## See also the examples for 'connections'.

