On Tue, 2009-04-07 at 12:59 +0200, Pierre-Yves wrote: > On Tue, 2009-04-07 at 12:09 +0200, Martyn Plummer wrote: > > > Setting R_HOME in the environment before launching R is the wrong > > thing to do. > Just out of curiosity, why ? R_HOME should be coherent between the > environment and R itself, through a warning if they are different makes > sense (IMHO), but if they are the same what is the problem ?
People can and do have multiple R installations. Most of these people are developers, but we also encourage users to download and test beta releases. You are currently breaking developer builds by setting R_HOME to point to the Fedora RPM. Of course, the breakage is relatively minor, and takes the form of annoying warnings, but those warnings were put there for a reason. The user is not meant to set R_HOME. The system administrator is certainly not meant to set R_HOME. R_HOME is meant to be set by the application that starts the R engine, and it does so in its own shell so that there are no side effects. This allows multiple versions of R to coexist on the same system. The only reason that the warning is silenced when the R_HOME environment variable matches the correct value is because the R script can recursively call itself, e.g. R CMD Sweave foo.Rnw will call two instances of the R shell script, and in the second call R_HOME is already set by the first call. Martyn ----------------------------------------------------------------------- This message and its attachments are strictly confidential. If you are not the intended recipient of this message, please immediately notify the sender and delete it. Since its integrity cannot be guaranteed, its content cannot involve the sender's responsibility. Any misuse, any disclosure or publication of its content, either whole or partial, is prohibited, exception made of formally approved use ----------------------------------------------------------------------- _______________________________________________ Fedora-r-devel-list mailing list Fedora-r-devel-list@redhat.com http://www.redhat.com/mailman/listinfo/fedora-r-devel-list
