title: how to extract single element from dataframe using magrittr?
body: <p>this might be a simple question, but I wasn't able to figure out the answer. Consider this simple dataframe</p>
  
  <pre><code>library(dplyr)
  library(purrr)
  library(magrittr)
  dataframe &lt;- data_frame(id = c(1,2,3,4),
                          text = c("this is a this", "this is another",'hello','what???'))
  
  &gt; dataframe
  # A tibble: 4 x 2
       id            text
    &lt;dbl&gt;           &lt;chr&gt;
  1     1  this is a this
  2     2 this is another
  3     3           hello
  4     4         what???
  </code></pre>
  
  <p>Here I want to write a pipe expression that extracts the element in row 4 and column text: <code>what???</code>.</p>
  
  <p>I tried to use</p>
  
  <pre><code>dataframe %&gt;% pull(text)[[4]]
  </code></pre>
  
  <p>but it does not work. What can I do here?</p>