Matplotlib cumulative plot
<p>What matplotlib function I should use for creating such "above" plots?</p>

<p>I've tried to find it in <a href="http://matplotlib.org/gallery.html" rel="nofollow">gallery</a>, but I've not managed to do it.</p>

<p><a href="http://i.stack.imgur.com/fUThW.png" rel="nofollow"><img src="http://i.stack.imgur.com/fUThW.png" alt="enter image description here"></a></p>

<p>You can find a solution on this : <a href="http://matplotlib.org/examples/pylab_examples/stackplot_demo.html" rel="nofollow">http://matplotlib.org/examples/pylab_examples/stackplot_demo.html</a></p>

python matplotlib