title: How can I mix a column and line chart in Rails using Chartkick?
body: <p>I would like to present graphs in my rails app. I was able to find a lot of projects that could do that, as <a href="http://chartkick.com/" rel="nofollow noreferrer">Chartkick</a>.
  But I would like to have charts like <a href="http://www.amcharts.com/demos/column-and-line-mix/" rel="nofollow noreferrer">this one</a>, where I max lines and columns. Is there any project that is able to draw this kind of graphs? I was not able to find anything on chartkick's website or Google.</p>