title: How to fill a scattered region in matplotlib?
body: <p>I've data file containing random scattered data over x,y plane. All I want is to fill the scattered  region with solid color. My data are not sorted. I've tried to use scatterplot in matplotlib but the number of points in my data file are quite large, so plotting them in scatter make the resulting plot quite big in size. The scattered data form small islands over the x,y plane.</p>