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Python Data Analysis - Third Edition

You're reading from  Python Data Analysis - Third Edition

Product type Book
Published in Feb 2021
Publisher Packt
ISBN-13 9781789955248
Pages 478 pages
Edition 3rd Edition
Languages
Authors (2):
Avinash Navlani Avinash Navlani
Profile icon Avinash Navlani
Ivan Idris Ivan Idris
Profile icon Ivan Idris
View More author details
Toc

Table of Contents (20) Chapters close

Preface 1. Section 1: Foundation for Data Analysis
2. Getting Started with Python Libraries 3. NumPy and pandas 4. Statistics 5. Linear Algebra 6. Section 2: Exploratory Data Analysis and Data Cleaning
7. Data Visualization 8. Retrieving, Processing, and Storing Data 9. Cleaning Messy Data 10. Signal Processing and Time Series 11. Section 3: Deep Dive into Machine Learning
12. Supervised Learning - Regression Analysis 13. Supervised Learning - Classification Techniques 14. Unsupervised Learning - PCA and Clustering 15. Section 4: NLP, Image Analytics, and Parallel Computing
16. Analyzing Textual Data 17. Analyzing Image Data 18. Parallel Computing Using Dask 19. Other Books You May Enjoy

Moving averages

Moving averages, or rolling means, are time-series filters that filter impulsive responses by averaging the set or window of observations. It uses window size concepts and finds the average of the continuous window slides for each period. The simple moving average can be represented as follows:

There are various types of moving averages available, such as centered, double, and weighted moving averages. Let's find the moving average using the rolling() function, but before that, we'll first load the data and visualize it:

# import needful libraries
import pandas as pd
import statsmodels.api as sm
import matplotlib.pyplot as plt

# Read dataset
sales_data = pd.read_csv('sales.csv')

# Setting figure size
plt.figure(figsize=(10,6))

# Plot original sales data
plt.plot(sales_data['Time'], sales_data['Sales'], label="Sales-Original")

# Rotate xlabels
plt.xticks(rotation=60)

# Add legends
plt.legend...
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