Book Image

Python Data Analysis - Third Edition

By : Avinash Navlani, Ivan Idris
5 (1)
Book Image

Python Data Analysis - Third Edition

5 (1)
By: Avinash Navlani, Ivan Idris

Overview of this book

Data analysis enables you to generate value from small and big data by discovering new patterns and trends, and Python is one of the most popular tools for analyzing a wide variety of data. With this book, you’ll get up and running using Python for data analysis by exploring the different phases and methodologies used in data analysis and learning how to use modern libraries from the Python ecosystem to create efficient data pipelines. Starting with the essential statistical and data analysis fundamentals using Python, you’ll perform complex data analysis and modeling, data manipulation, data cleaning, and data visualization using easy-to-follow examples. You’ll then understand how to conduct time series analysis and signal processing using ARMA models. As you advance, you’ll get to grips with smart processing and data analytics using machine learning algorithms such as regression, classification, Principal Component Analysis (PCA), and clustering. In the concluding chapters, you’ll work on real-world examples to analyze textual and image data using natural language processing (NLP) and image analytics techniques, respectively. Finally, the book will demonstrate parallel computing using Dask. By the end of this data analysis book, you’ll be equipped with the skills you need to prepare data for analysis and create meaningful data visualizations for forecasting values from data.
Table of Contents (20 chapters)
Section 1: Foundation for Data Analysis
Section 2: Exploratory Data Analysis and Data Cleaning
Section 3: Deep Dive into Machine Learning
Section 4: NLP, Image Analytics, and Parallel Computing

Developing a linear regression model

After understanding the concepts of regression analysis, multicollinearity, and dummy variables, it's time to get some hands-on experience with regression analysis. Let's learn how to build the regression model using the scientific toolkit for machine learning (scikit-learn):

  1. We will first load the dataset using the read_csv() function:
# Import pandas
import pandas as pd

# Read the dataset using read_csv method df = pd.read_csv("Advertising.csv")
# See the top-5 records in the data df.head()

This results in the following output:

Now that we have loaded the Advertising.csv dataset using read_csv() and checked the initial records using the head() function, we will split the data into two parts: dependent or target variable and independent variables or features.

  1. In this step, we will split the data two times:
  • Split into two parts: dependent or target variable and independent variables or features.
  • Split data into training and...