How To Graph A Tree With Graphviz?

I can't reproduce a simple example. Here is how it goes: import pandas as pd import numpy as np import sklearn as skl from sklearn import tree from sklearn.cross_validation import

Solution 1:

It seem you didn't install the graphviz software at all. You should download and install it before using the module.

Solution 2:

step 1, install C-version of graphviz using 'sudo apt-get install graphviz' if ubuntu, 'brew install graphviz' if OSX

step 2, install package 'graphviz' by pip sudo pip install graphviz