Plot Interaction of Categorical Factors
=======================================


.. ipython:: python

   
   

In this example, we will vizualize the interaction between
categorical factors. First, we will create some categorical
data are initialized. Then plotted using the interaction_plot
function which internally recodes the x-factor categories to
ingegers.

.. ipython:: python

   
   import numpy as np
   import matplotlib.pyplot as plt
   from statsmodels.graphics.factorplots import interaction_plot
   from pandas import Series
   
   np.random.seed(12345)
   weight = Series(np.repeat(['low', 'hi', 'low', 'hi'], 15), name='weight')
   nutrition = Series(np.repeat(['lo_carb', 'hi_carb'], 30), name='nutrition')
   days = np.log(np.random.randint(1, 30, size=60))
   
   plt.figure(figsize=(6, 6));
   
   @savefig interaction_plot_categorial.png align=center
   interaction_plot(x=weight, trace=nutrition, response=days,
                    colors=['red', 'blue'], markers=['D', '^'], ms=10);
   