The library used in this recipe uses gnuplot to render the graph. We should first install gnuplot.

On Debian-based systems such as Ubuntu, we can install it using apt-get as follows:

$ sudo apt-get install gnuplot-x11

The official place to download gnuplot is from its main website available at http://www.gnuplot.info.

After gnuplot is set up, install the easyplot Haskell library using Cabal as follows:

$ cabal install easyplot

Also, install a helper CSV package as follows:

$ cabal install csv

Also, create two comma-separated files, input1.csv and input2.csv, which represent two separate sets of points as follows:

$ cat input1.csv
1,1,1
1,2,1
0,1,1
1,1,0
2,1,0
2,1,1
1,0,1

$ cat input2.csv
4,3,2
3,3,2
3,2,3
4,4,3
5,4,2
4,2,3
3...