title: How to insert new column names to a tibble in r?
body: <p>I have the following Tibbles.</p>
  <pre><code>tmp             &lt;- tibble()
  tmp2            &lt;- tibble()
  tmp             &lt;- tmp %&gt;% rbind( colSums( y_matrix) ) 
  tmp2            &lt;- tmp2 %&gt;% rbind( proportions( colSums( y_matrix )))
  data          &lt;- bind_cols(tmp,tmp2)
  </code></pre>
  <p>I want to add column names for &quot;data&quot; accordingly. The number of columns in tmp and tmp2 will change from time to time. So how can I add column names without defining them one by one?</p>
  <p>The expected column names in the output is like this.</p>
  <p>c1   c2   c1_prop  c2_prop</p>
  <p>Is there any method to create this?</p>