I got this when I am trying to install package from bioconductor, but it seems it does not work properly. The manual of this package is here:
http://www.bioconductor.org/packages/devel/bioc/manuals/RTN/man/RTN.pdf
The package name is RTN.
biocLite("RTN")
BioC_mirror: http://bioconductor.org Using Bioconductor version 2.12 (BiocInstaller
1.10.4), R version 3.0.1.
Installing package(s) 'RTN'
Warning messages:
1: package ‘RTN’ is not available (for R version 3.0.1)
2: installed directory not writable, cannot update
packages 'class', 'foreign', 'lattice', 'MASS',
'Matrix', 'mgcv', 'nlme', 'nnet', 'rpart',
'spatial', 'survival'
> library(RTN)
Error in library(RTN) : there is no package called ‘RTN’
Your version of Bioconductor (2.12) is too old for RTN, which was introduced (see the RTN landing page) in Bioconductor 2.13. I think you can say
source("http://bioconductor.org/biocLite.R")
biocLite("BiocUpgrade")
but (a) this might require that your R be updated and (b) it will likely update (re-install) any existing Bioconductor and perhaps some CRAN packages, so you should be prepared for a few bumps in the road.