The Machine Learning Workshop - Second Edition

By : Hyatt Saleh

The Machine Learning Workshop - Second Edition

By: Hyatt Saleh

Overview of this book

Machine learning algorithms are an integral part of almost all modern applications. To make the learning process faster and more accurate, you need a tool flexible and powerful enough to help you build machine learning algorithms quickly and easily. With The Machine Learning Workshop, you'll master the scikit-learn library and become proficient in developing clever machine learning algorithms. The Machine Learning Workshop begins by demonstrating how unsupervised and supervised learning algorithms work by analyzing a real-world dataset of wholesale customers. Once you've got to grips with the basics, you'll develop an artificial neural network using scikit-learn and then improve its performance by fine-tuning hyperparameters. Towards the end of the workshop, you'll study the dataset of a bank's marketing activities and build machine learning models that can list clients who are likely to subscribe to a term deposit. You'll also learn how to compare these models and select the optimal one. By the end of The Machine Learning Workshop, you'll not only have learned the difference between supervised and unsupervised models and their applications in the real world, but you'll also have developed the skills required to get started with programming your very own machine learning algorithms.

Preface

About the Book

1. Introduction to Scikit-Learn

Introduction

Introduction to Machine Learning

Supervised and Unsupervised Learning

Summary

Free Chapter

2. Unsupervised Learning – Real-Life Applications

Introduction

Clustering

Exploring a Dataset – Wholesale Customers Dataset

Data Visualization

Mean-Shift Algorithm

DBSCAN Algorithm

Evaluating the Performance of Clusters

Summary

3. Supervised Learning – Key Steps

Introduction

Supervised Learning Tasks

Model Validation and Testing

Evaluation Metrics

Error Analysis

Summary

4. Supervised Learning Algorithms: Predicting Annual Income

Introduction

Exploring the Dataset

The Naïve Bayes Algorithm

The Decision Tree Algorithm

The Support Vector Machine Algorithm

Error Analysis

Summary

5. Supervised Learning – Key Steps

Introduction

Artificial Neural Networks

Applying an Artificial Neural Network

Performance Analysis

Summary

6. Building Your Own Program

Introduction

Program Definition

Saving and Loading a Trained Model

Interacting with a Trained Model

Summary

Appendix

1. Introduction to Scikit-Learn

2. Unsupervised Learning – Real-Life Applications

3. Supervised Learning – Key Steps

4. Supervised Learning Algorithms: Predicting Annual Income

5. Artificial Neural Networks: Predicting Annual Income

6. Building Your Own Program

Customer Reviews

5 star

4 star

3 star

2 star

1 star

2. Unsupervised Learning – Real-Life Applications

Activity 2.01: Using Data Visualization to Aid the Pre-processing Process

Solution:

Import all the required elements to load the dataset and pre-process it:
```
import pandas as pd
import matplotlib.pyplot as plt
import numpy as np
```
Load the previously downloaded dataset by using pandas' read_csv() function. Store the dataset in a pandas DataFrame named data:
```
data = pd.read_csv("wholesale_customers_data.csv")
```
Check for missing values in your DataFrame. Using the isnull() function plus the sum() function, count the missing values of the entire dataset at once:
```
data.isnull().sum()
```
The output is as follows:
```
Channel             0
Region              0
Fresh               0
Milk                0
Grocery             0
Frozen              0
Detergents_Paper    0
Delicassen          0
dtype: int64
```
As you can see from the preceding screenshot, there are no missing values in the dataset.
Check for outliers...

The Machine Learning Workshop - Second Edition

By : Hyatt Saleh

The Machine Learning Workshop - Second Edition

By: Hyatt Saleh

Overview of this book

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The Machine Learning Workshop - Second Edition

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2. Unsupervised Learning – Real-Life Applications

Activity 2.01: Using Data Visualization to Aid the Pre-processing Process