title: Downgrade R version and R package Bioconductor
body: <p>Hello everyone I am currently running R 3.0.2 on a debian server with Bioconductor v2.13. My question is simple although searching through the internet hasn't provided me with a clear answer:</p>
  
  <p>How can I downgrade from R 3.0.2. to R 2-15?</p>
  
  <p>Considering i keep R 3.0.2 how can i downgrade Bioconductor to v2.12?</p>
  
  <p>Thank you in advance,</p>