title: R - formula to calculate Bollinger Bands without charting?
body: <p>I have a OHLC data frame, and trying to calculate the Bollinger Bands without charting witin R.</p>
  
  <p>The below works but i'm looking to create a new data frame containing BB levels.</p>
  
  <pre><code>head(stock)
                     minutes.Open minutes.High minutes.Low minutes.Close
  
  2014-08-04 01:00:00      102.561      102.581     102.486       102.537
  2014-08-04 05:00:00      102.536      102.677     102.530       102.673
  2014-08-04 09:00:00      102.668      102.713     102.537       102.597
  2014-08-04 13:00:00      102.591      102.656     102.578       102.578
  2014-08-04 17:00:00      102.570      102.572     102.438       102.487
  2014-08-04 21:00:00      102.481      102.584     102.460       102.584
  
  chartSeries(stock)
  addBBands()
  </code></pre>
  
  <p>Please help to point me in the right direction.</p>