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Hands-On Data Analysis with Pandas

You're reading from   Hands-On Data Analysis with Pandas Efficiently perform data collection, wrangling, analysis, and visualization using Python

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Product type Paperback
Published in Jul 2019
Publisher
ISBN-13 9781789615326
Length 740 pages
Edition 1st Edition
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Author (1):
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Stefanie Molin Stefanie Molin
Author Profile Icon Stefanie Molin
Stefanie Molin
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Table of Contents (21) Chapters Close

Preface 1. Section 1: Getting Started with Pandas
2. Introduction to Data Analysis FREE CHAPTER 3. Working with Pandas DataFrames 4. Section 2: Using Pandas for Data Analysis
5. Data Wrangling with Pandas 6. Aggregating Pandas DataFrames 7. Visualizing Data with Pandas and Matplotlib 8. Plotting with Seaborn and Customization Techniques 9. Section 3: Applications - Real-World Analyses Using Pandas
10. Financial Analysis - Bitcoin and the Stock Market 11. Rule-Based Anomaly Detection 12. Section 4: Introduction to Machine Learning with Scikit-Learn
13. Getting Started with Machine Learning in Python 14. Making Better Predictions - Optimizing Models 15. Machine Learning Anomaly Detection 16. Section 5: Additional Resources
17. The Road Ahead 18. Solutions
19. Other Books You May Enjoy Appendix

Cleaning up the data

Let's move on to the 3-cleaning_data.ipynb notebook for our discussion on data cleaning. We will begin by importing pandas and reading in the data/nyc_temperatures.csv file, which contains the maximum daily temperature (TMAX), minimum daily temperature (TMIN), and the average daily temperature (TAVG) from the LaGuardia airport station in New York City for October 2018:

>>> import pandas as pd

>>> df = pd.read_csv('data/nyc_temperatures.csv')
>>> df.head()

The data we retrieved from the API is in the long format; for our analysis, we want it in the wide format, but we will address that in the Pivoting DataFrames section later this chapter:

attributes datatype date station value
0 H,,S, TAVG 2018-10-01T00:00:00 GHCND:USW00014732 21.2
1 ,,W,2400 TMAX 2018-10-01T00:00:00 GHCND:USW00014732 25.6
2 ,,W,2400 TMIN...
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