Book Image

Machine Learning Solutions

Book Image

Machine Learning Solutions

Overview of this book

Machine learning (ML) helps you find hidden insights from your data without the need for explicit programming. This book is your key to solving any kind of ML problem you might come across in your job. You’ll encounter a set of simple to complex problems while building ML models, and you'll not only resolve these problems, but you’ll also learn how to build projects based on each problem, with a practical approach and easy-to-follow examples. The book includes a wide range of applications: from analytics and NLP, to computer vision domains. Some of the applications you will be working on include stock price prediction, a recommendation engine, building a chat-bot, a facial expression recognition system, and many more. The problem examples we cover include identifying the right algorithm for your dataset and use cases, creating and labeling datasets, getting enough clean data to carry out processing, identifying outliers, overftting datasets, hyperparameter tuning, and more. Here, you'll also learn to make more timely and accurate predictions. In addition, you'll deal with more advanced use cases, such as building a gaming bot, building an extractive summarization tool for medical documents, and you'll also tackle the problems faced while building an ML model. By the end of this book, you'll be able to fine-tune your models as per your needs to deliver maximum productivity.
Table of Contents (19 chapters)
Machine Learning Solutions
Foreword
Contributors
Preface
Index

Testing the baseline model


In this section, we will be implementing our testing approach so that we can evaluate our model's accuracy. We will first generate the output prediction and then we'll start testing it. We will be implementing the following steps here:

  1. Generating and interpreting the output

  2. Generating the score

  3. Visualizing the output

Generating and interpreting the output

To generate the prediction, we are using the treeinterpreter library. We are predicting the price value for each of our testing dataset records using the following code:

Figure 2.26: Code snippet for generating the prediction

Here, prediction is the array in which we have elements that are the corresponding predicted adj close price for all records of the testing dataset. Now, we will compare this predicted output with the actual adj close price of the testing dataset. By doing this, we will get to know how accurately our first model is predicting the adj close price. In order to evaluate further, we will generate...