Advice on GRASS version for R

Thank you for your advice, I send an e-mail to a french grass list.

The best solution seems for me to work with future version

But I cannot install spgrass 7 or spgrass on windows 7 in R version 3.1.2 :

 install.packages("spgrass7", repos="http://R-Forge.R-project.org")

Avis : impossible d'acc?der ? l'index de l'entrep?t 
http://R-Forge.R-project.org/bin/windows/contrib/3.1
Message d'avis :
package 'spgrass7' is not available (for R version 3.1.2)

 RSiteSearch("spgrass7")

Une requ?te de recherche a ?t? soumise ? http://search.r-project.org
La page de r?sultats devrait s'ouvrir dans votre navigateur

 install.packages("spgrass", repos="http://R-Forge.R-project.org")

Avis : impossible d'acc?der ? l'index de l'entrep?t 
http://R-Forge.R-project.org/bin/windows/contrib/3.1
Message d'avis :
package 'spgrass' is not available (for R version 3.1.2)

How to do it?
Thank you
Fr?d?ric

Le 27/01/2015 21:48, "> Roger Bivand (par Internet, d?p?t 
r-sig-geo-bounces at r-project.org)" a ?crit :

 On Tue, 27 Jan 2015, Rich Shepard wrote:

 On Tue, 27 Jan 2015, PONS Frederic - CEREMA/DTerMed/DREC/SRILH wrote:

 Do you know what is the future standard of GRASS to script for the 
 future
  version.

 There is ongoing discussion on the grass-stats list:

 http://lists.osgeo.org/mailman/listinfo/grass-stats

 The GRASS 7.0 RC1 is where many parameter names have been changed. The
 changes are quite large, so the current R spgrass6 package will only
 handle GRASS 6 up to GRASS 7.0 beta, while the new spgrass7 (in the
 spgrass project on R-Forge) is being matched to changes in GRASS 7.0 RC*.
 See:

 install.packages("spgrass7", repos="http://R-Forge.R-project.org")

 This is thanks to input and work by Rainer Krug and Markus Neteler. RC2
 should be out soon too. spgrass6 will shift to maintenance mode only
 shortly after GRASS 7.0 is released, but will stay available.

 The parameter name changes are on:

 http://trac.osgeo.org/grass/wiki/Grass7/NewFeatures#Optionschanges

 We have not checked against GRASS trunk. I think that your adaptation
 might match the regular 7.* series rather than the development trunk, but
 I agree with Rich that it would be worth asking on the GRASS users or
 developers list.

 Roger

  Ask on the GRASS mail list; you can sign up at http://grass.osgeo.org/.

 If there are syntactic differences I would assume that those in the 
 7.1svn
 are the future. I've used GRASS (on linux) since 4.0 and current use 
 7.1svn
 so I've seen many differences over the past couple of decades.

 Rich