title: Install R packages using conda via an environment.yml file
body: <p>Normally I create conda environments like...</p>
  
  <pre><code>conda env create -f environment.yml
  conda activate env_name
  </code></pre>
  
  <p>Normally I work in Python, where a typical <code>environment.yml</code> simple file might looks like this...</p>
  
  <pre><code>name: env_name
  dependencies:
    - python=3.7
    - pip=19.3
    - pandas=0.24.2
    - pip:
      - scipy==1.2.1
  </code></pre>
  
  <p>What should the <code>environment.yml</code> file look like to install R packages? The packages are on CRAN</p>