title: Installing r-base; Depenency: r-recommended missing?
body: <p>Hello I am trying to install r-base for Ubuntu 16.04.</p>
  
  <p>I have followed the steps at <a href="https://cran.r-project.org/bin/linux/ubuntu/README.html" rel="noreferrer">https://cran.r-project.org/bin/linux/ubuntu/README.html</a> </p>
  
  <p>However I am getting a 'unmet dependencies' error when I run <code>sudo apt-get install r-base</code></p>
  
  <blockquote>
    <p>The following packages have unmet dependencies:
     r-base : Depends: r-recommended (= 3.4.4-1xenial0) but it is not going to be installed</p>
    
    <p>E: Unable to correct problems, you have held broken packages.</p>
  </blockquote>
  
  <p>Any ideas for getting around this?
  Thanks in advance!</p>