Book Image

The Supervised Learning Workshop - Second Edition

By : Blaine Bateman, Ashish Ranjan Jha, Benjamin Johnston, Ishita Mathur
Book Image

The Supervised Learning Workshop - Second Edition

By: Blaine Bateman, Ashish Ranjan Jha, Benjamin Johnston, Ishita Mathur

Overview of this book

Would you like to understand how and why machine learning techniques and data analytics are spearheading enterprises globally? From analyzing bioinformatics to predicting climate change, machine learning plays an increasingly pivotal role in our society. Although the real-world applications may seem complex, this book simplifies supervised learning for beginners with a step-by-step interactive approach. Working with real-time datasets, you’ll learn how supervised learning, when used with Python, can produce efficient predictive models. Starting with the fundamentals of supervised learning, you’ll quickly move to understand how to automate manual tasks and the process of assessing date using Jupyter and Python libraries like pandas. Next, you’ll use data exploration and visualization techniques to develop powerful supervised learning models, before understanding how to distinguish variables and represent their relationships using scatter plots, heatmaps, and box plots. After using regression and classification models on real-time datasets to predict future outcomes, you’ll grasp advanced ensemble techniques such as boosting and random forests. Finally, you’ll learn the importance of model evaluation in supervised learning and study metrics to evaluate regression and classification tasks. By the end of this book, you’ll have the skills you need to work on your real-life supervised learning Python projects.
Table of Contents (9 chapters)

2. Exploratory Data Analysis and Visualization

Activity 2.01: Summary Statistics and Missing Values

The steps to complete this activity are as follows:

  1. Import the required libraries:
    import json
    import pandas as pd
    import numpy as np
    import missingno as msno
    from sklearn.impute import SimpleImputer
    import matplotlib.pyplot as plt
    import seaborn as sns
  2. Read the data. Use pandas' .read_csv method to read the CSV file into a pandas DataFrame:
    data = pd.read_csv('../Datasets/house_prices.csv')
  3. Use pandas' .info() and .describe() methods to view the summary statistics of the dataset:

    The output of info() will be as follows:

    Figure 2.50: The output of the info() method (abbreviated)

    The output of describe() will be as follows:

    Figure 2.51: The output of the describe() method (abbreviated)

  4. Find the total count and total percentage of missing values in each column of the DataFrame and display them for columns having at least...