Python Business Intelligence Cookbook

Creating a predictive model using a random forest

A random forest is an ensemble (a group) of decision trees which will output a prediction value.

For this recipe, we are going to use the Heart dataset from An Introduction to Statistical Learning with Applications in R.

How to do it…

1. First, import the Python libraries that you need:

   import pandas as pd
   import numpy as np
   import matplotlib as plt
   import matplotlib.pyplot as plt
   %matplotlib inline

2. Next, define a variable for the heart data file, import the data, and view the top five rows:

   data_file = '/Users/robertdempsey/Dropbox/private/Python Business Intelligence Cookbook/Data/ISL/Heart.csv' heart = pd.read_csv(data_file, sep=',', header=0, index_col=0, parse_dates=True, tupleize_cols=False, error_bad_lines=False, ...