[R] R and tmp directroy

[Martin Olivier]

Hi all,

When I start R, it gives

mkdir: Ne peut créer le répertoire `/home/mart/tmp/Rtmp11729'.: No such file or directory


(I specify that my home path is /home/mart and the R version is 1.7.1)

How I have to configure R to use the directory /tmp instead of 
/home/mart/tmp ?
What is utility of this directory tmp for R?


Thanks,
Olivier