[R] What Directs R to Executable Directory?

[Rich Shepard]

   I apparently had a prior version of R in /usr/local/, but deleted all
R files in that subdirectory. Rebuilt R-3.0.3 and installed it in /usr/.
However, when I try to start R as either a user or as root it aborts because
it cannot find /usr/local/bin/R.

   Where is this information stored? I need to either edit that file or
remove it so R can happily find all it wants in /usr/.

Thanks,

Rich