Multiple Axis with Plots.jl
<p>Is there a way to have the second dataset plot on a separate axis, overlaid on the first plot? </p>

<pre><code>using Plots; gadfly(size=(800,400))

plot(Vector[randn(100)], line = ([:green], :step))

plot!(Vector[randn(100)], line = ([:red], :step))
</code></pre>