title: Can't get multiple panel plots with chartSeries function from quantod package in R
body: <p>Jeff Ryan's quantmod package is an excellent contribution to the R finance world.</p>
  
  <p>I like to use chartSeries() function, but when I try to get it to display multiple panes simultaneously, it doesn't work.</p>
  
  <pre><code>par(mfrow=c(2,2))
  
  chartSeries (SPX)
  chartSeries (SPX, subset="2010")
  
  chartSeries (NDX)
  chartSeries (NDX, subset="2010")
  </code></pre>
  
  <p>would normally return a four-panel graphic as it does with the plot() function but in the chartSeries example it runs through all instances one at a time without creating a single four-panel graphic.</p>