title: as.Date showing character string in unambiguous format even when strptime specified R
body: <p>I have this date column of form:</p>
  
  <pre><code>20160812
  20160813
  </code></pre>
  
  <p>Basically YYYYMMDD.</p>
  
  <p>I converted it to a date using strptime and as.Date</p>
  
  <pre><code>weather_dataset$DATE = as.Date(weather_dataset$DATE,"%Y%m%d")
  </code></pre>
  
  <p>But I get</p>
  
  <pre><code>Error in charToDate(x) : 
    character string is not in a standard unambiguous format
  </code></pre>
  
  <p>Huh? I've clearly specified the format to use, but its still throwing me this error for some reason. Would appreciate help! :) </p>
  
  <p>Thank you!</p>