title: Can you ignore columns using dygraphs?
body: <p>I basically have a large CSV file with 18 columns in it, but I don't need all that data for my chart.  I just need 4 (the date, and three data values) and ignore the rest.  Does dygraphs let me do this?  Or do I need to find a different library?</p>
  
  <p>I would rather not reparse the CSV file into smaller chunks because I would end up having to manage 20 different CSV files instead of just 4.</p>