/ 
Statistics-R-0.01
River stage one • 2 direct dependents • 2 total dependents
/ Statistics::R

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.

USAGE

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(qq`x = 123 \n print(x)`) ;
my $ret = $R->read ;

$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.

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->startR ;

$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>

I will appreciate any type of feedback (include your opinions and/or suggestions). ;-P

COPYRIGHT

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