R help - Nov 2011 - R in batch mode packages loading question

Hello,


I use R in batch mode. Each time, I execute a script, R is loading each 
packages I need in my script. That's Ok
But, I had to execute many scripts , and each time R is re-loading the 
corresponding packages, which take to much time

Is it possible ask R to load the packages only once, and stay in memory 
in background for further scripts, which would avoid to load the 
packages in each script, or if you have another solution that need to 
only load packages once in the first scripts, so that further scripts do 
not need to load these packages too.


Thanks in advance
-- 

*Patrick PALMIER**
**Centre d'Études Techniques de l'Équipement Nord - Picardie
Département Transport Mobilités
*/*Responsable du groupe Systèmes de Transports*//*
*/2, rue de Bruxelles, BP 275
59019 Lille cedex
FRANCE
Tél: +33 (0) 3 20 49 60 70
Fax: +33 (0) 3 20 49 63 69


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Hello,


I use R in batch mode. Each time, I execute a script, R is loading each 
packages I need in my script. That's Ok
But, I had to execute many scripts , and each time R is re-loading the 
corresponding packages, which take to much time

Is it possible ask R to load the packages only once, and stay in memory 
in background for further scripts, which would avoid to load the 
packages in each script, or if you have another solution that need to 
only load packages once in the first scripts, so that further scripts do 
not need to load these packages too.


Thanks in advance
-- 

*Patrick PALMIER**
**Centre d'?tudes Techniques de l'?quipement Nord - Picardie
D?partement Transport Mobilit?s
*/*Responsable du groupe Syst?mes de Transports*//*
*/2, rue de Bruxelles, BP 275
59019 Lille cedex
FRANCE
T?l: +33 (0) 3 20 49 60 70
Fax: +33 (0) 3 20 49 63 69

On 07/11/2011 5:49 AM, PALMIER Patrick (Responsable de groupe) - CETE 
NP/TM/ST wrote:
> Hello,
>
>
> I use R in batch mode. Each time, I execute a script, R is loading each
> packages I need in my script. That's Ok
> But, I had to execute many scripts , and each time R is re-loading the
> corresponding packages, which take to much time
>
> Is it possible ask R to load the packages only once, and stay in memory
> in background for further scripts, which would avoid to load the
> packages in each script, or if you have another solution that need to
> only load packages once in the first scripts, so that further scripts do
> not need to load these packages too.
Write one script that has a sequence of calls to source() to run the 
other scripts.

You'll need to be careful that unintentional leftover objects and 
settings from one script don't affect the others; you may also want to 
use the "echo=TRUE" option when you source, so you see the commands as
they are executed.

Duncan Murdoch

Try the fork() function in the package multicore (if your system supports it)


Andrew


-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of PALMIER Patrick (Responsable de groupe) - CETE NP/TM/ST
Sent: Monday, November 07, 2011 3:49 AM
To: r-help at r-project.org
Subject: [R] R in batch mode packages loading question

Hello,


I use R in batch mode. Each time, I execute a script, R is loading each packages
I need in my script. That's Ok But, I had to execute many scripts , and each
time R is re-loading the corresponding packages, which take to much time

Is it possible ask R to load the packages only once, and stay in memory in
background for further scripts, which would avoid to load the packages in each
script, or if you have another solution that need to only load packages once in
the first scripts, so that further scripts do not need to load these packages
too.


Thanks in advance
-- 

*Patrick PALMIER**
**Centre d'?tudes Techniques de l'?quipement Nord - Picardie D?partement
Transport Mobilit?s */*Responsable du groupe Syst?mes de Transports*//* */2, rue
de Bruxelles, BP 275
59019 Lille cedex
FRANCE
T?l: +33 (0) 3 20 49 60 70
Fax: +33 (0) 3 20 49 63 69