NAME

Statistics::R - Controls the R (R-project) interpreter through Perl.

DESCRIPTION

This will permit the control of the the R (R-project) interpreter through Perl in different architectures and OS.

You can for example, start only one instance of the R interpreter and have different Perl process accessing it.

SYNOPSIS

use Statistics::R;

my $R = Statistics::R->new();

$R->startR;

      $R->send(q`postscript("file.ps" , horizontal=FALSE , width=500 , height=500 , pointsize=1)`);
      $R->send(q`plot(c(1, 5, 10), type = "l")`);
      $R->send(q`dev.off()`);
      $R->send(qq`x = 123 \n print(x)`);

      my $ret = $R->read;
      print "\$ret : $ret\n";

      $R->stopR();

NEW

When creating the R bridje object (Statistics::R), you can set some

options

log_dir

The directory where the bridge between R and Perl will be created.

R and Perl need to have read and write access to the directory!

*By dafault it will be created at %TMP_DIR%/Statistics-R.*

r_bin

The path to the R binary.

        By default the path will be searched in the default installation
        path of R in the OS.

r_dir

The directory of R.

tmp_dir

A temporary directory.

        By default the temporary directory of the OS will be
        used/searched.

METHODS

startR

Start R and the communication bridge.

start_sharedR

Start R or use an already running communication bridge.

stopR

Stop R and the bridge.

restartR

stop() and start() R.

Rbin

Return the path to the R binary (executable).

send ($CMD)

        Send some command to be executed inside R. Note that $CMD will be
        loaded by R with source()

read ($TIMEOUT)

        Read the output of R for the last group of commands sent to R by
        send().

lock

Lock the bridge for your PID.

unlock

Unlock the bridge if your PID have locked it.

is_blocked

Return TRUE if the bridge is blocked for your PID.

        In other words, returns TRUE if other process has lock()ed the
        bridge.

is_started

Return TRUE if the R interpreter is started, or still started.

clean_up

Clean up the enverioment, removing all the objects.

error

Return the last error message.

INSTALL

To install this package you need to install R in your OS first, since Statistics::R need to find R path to work fine.

A standart installation of R on Win32 and Linux will work fine and detected automatically by Statistics::R.

Download page of R: <http://cran.r-project.org/banner.shtml>

Or go to the R web site: <http://www.r-project.org/>

EXECUTION FOR MULTIPLE PROCESS

The main pourpose of Statistics::R is to start a single R interpreter that hear multiple Perl process.

Note that to do that R and Perl need to be running with the same user/group level.

To start the Statistics::R bridge you can use the script statistics-r.pl:

$> statistics-r.pl start

From your script you need to use the start_sharedR() option:

use Statistics::R;

my $R = Statistics::R->new();

$R->start_sharedR;

$R->send('x = 123');

exit;

Note that in the example above the method stopR() wasn't called, sine it will close the bridge.

SEE ALSO

• Statistics::R::Bridge
• The R-project web site: <http://www.r-project.org/>
• Statistics:: modules for Perl: <http://search.cpan.org/search?query=Statistics&mode=module>

AUTHOR

Graciliano M. P. <gm@virtuasites.com.br>

MAINTAINER

Brian Cassidy <bricas@cpan.org>

COPYRIGHT & LICENSE

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.