title: re- installing R linux ubuntu: unmet dependencies R
body: <p>I used aptitude install to install a package, Ubuntu 11.10 oneiric, that apparently I couldn't install because of dependencies. I removed a couple of more libraries while doing it. I uninstalled Rstudio but still can't install R on my machine. I'm on ubuntu and this is what I get while running 
  sudo apt-get install r-base</p>
  
  <p>The following packages have unmet dependencies:
   r-base : Depends: r-base-core (>= 2.15.3-1quantal0) but it is not going to be installed
            Depends: r-recommended (= 2.15.3-1quantal0) but it is not going to be installed
            Recommends: r-base-html but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.</p>
  
  <p>any ideas how to start from scratch and get R running again? </p>
  
  <p>More of the Error log:
  The following packages have unmet dependencies r-base-core : Depends: libblas3 but it is not installable or libblas.so.3 but it is not installable or libatlas3-base but it is not installable Depends: libc6 (>= 2.15) but 2.13-20ubuntu5.3 is to be installed Depends: liblapack3 but it is not installable or liblapack.so.3 but it is not installable or libatlas3-base but it is not installable Depends: liblzma5 (>= 5.1.1alpha+20120614) but it is not installable –</p>