title: Switching columns to last column in data frame r
body: <p>I have a dataframe with 20 columns. I want to save 20 dataframes where each column is one time the last column. How can I do this efficiently with for example this dataframe?</p>
  
  <pre><code>dataframe &lt;- data.frame(a=numeric(),
                          b=numeric(),
                          c=numeric(),
                          d=numeric(),
                          e=numeric(),
                          f=numeric())
  </code></pre>