title: Converting chr to numeric and still not able to take mean
body: <p>I am working with a dataframe from NYC opendata. On the information page it claims that a column, ACRES, is numeric, but when I download it is chr. I've tried the following:</p>
  <pre><code>parks$ACRES &lt;- as.numeric(as.character(parks$ACRES))
  </code></pre>
  <p>which turned the column info type into dbl, but I was unable to take the mean, so I tried:</p>
  <pre><code>parks$ACRES &lt;- as.integer(as.numeric(parks$ACRES))
  </code></pre>
  <p>I've also tried sapply() and I get an error message with <em>NAs introduced by coercion</em>. I tried convert() to but R didn't recognize it though it is supposed to be part of dplyr.</p>
  <p>Either way I get NA as a result for the mean.</p>
  <p>I've tried taking the mean a few different ways:</p>
  <pre><code>mean(parks[[&quot;ACRES&quot;]])
  mean(parks$ACRES)
  </code></pre>
  <p>Which also didn't work? Is it the dataframe? I'm wondering since it is from the government there are limits?</p>
  <p>I'd appreciate any help.</p>