title: How to install R packages that are not available in "R-essentials"?
body: <p>I use an out-of-the-box Anaconda installation to work with Python. Now I have read that it is possible to also "include" the R world within this installation and to use the IR kernel within the <em>Jupyter/Ipython notebook</em>.</p>
  
  <p>I found the command to install a number of famous R packages: 
  conda install -c r r-essentials</p>
  
  <p>My beginner's question:</p>
  
  <p>How do I install R packages that are not included in the <em>R-essential</em> package? For example R packages that are available on CRAN. "pip" works only for PyPI Python packages, doesn't it?</p>