[R-sig-Geo] Format data frame of a shp file

["TRMAL Céline - CEREMA/DTerMed/DREC/SRILH"]

Hello

I'm modifying shape file in R.
When exporting with writeOGR or writeSpatialShape, the data frame has 
not the good format, too many digits for numeric.
I tried format(layer at data[,4],digits=1) but it didn't work?

Any ideas? Thanks in advance
-- 

*Céline TRMAL *
*Ingénieur Chargée d'Etudes
**DREC/Service Risques Inondations, Littoraux et Hydrauliques **- Tél.: 
04 42 24 76 77 *
*Direction Territoriale Méditerranée
*
Centre d’études et d’expertise sur les risques, l’environnement, la 
mobilité et l’aménagement
www.cerema.fr <http://www.cerema.fr>
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