In [1]:
%matplotlib inline
from ggplot import *
import pandas as pd

In [5]:
mpg = pd.melt(mpg[['hwy', 'cty']])

In [6]:
ggplot(mpg, aes(x='value', color='variable')) + \
    geom_density()


Out[6]:
<ggplot: (285111193)>

In [ ]: