title: Saving several variables in a single RDS file
body: <p>I want to pass a list of variables to saveRDS() to save their values, but instead it saves their names:</p>
  
  <pre><code>variables &lt;- c("A", "B", "C")
  saveRDS(variables, "file.R")
  </code></pre>
  
  <p>it saves the single vector "variables".</p>
  
  <p>I also tried:</p>
  
  <pre><code>save(variables, "file.RData")
  </code></pre>
  
  <p>with no success</p>