Cleaning and Exploring Big Data using PySpark

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In this Guided Project, you will:

Learn how to clean your big dataset in PySpark

Learn how to explore big dataset in PySpark

Learn how to create visualizations from big dataset loaded in PySpark

2 hours
Intermediate
No download needed
Split-screen video
English
Desktop only

By the end of this project, you will learn how to clean, explore and visualize big data using PySpark. You will be using an open source dataset containing information on all the water wells in Tanzania. I will teach you various ways to clean and explore your big data in PySpark such as changing column’s data type, renaming categories with low frequency in character columns and imputing missing values in numerical columns. I will also teach you ways to visualize your data by intelligently converting Spark dataframe to Pandas dataframe. Cleaning and exploring big data in PySpark is quite different from Python due to the distributed nature of Spark dataframes. This guided project will dive deep into various ways to clean and explore your data loaded in PySpark. Data preprocessing in big data analysis is a crucial step and one should learn about it before building any big data machine learning model. Note: You should have a Gmail account which you will use to sign into Google Colab. Note: This course works best for learners who are based in the North America region. We’re currently working on providing the same experience in other regions.

Skills you will develop

  • Cleaning

  • Python Programming

  • Data Visualization (DataViz)

  • Apache Spark

  • Exploratory Data Analysis

Learn step-by-step

In a video that plays in a split-screen with your work area, your instructor will walk you through these steps:

  1. Install Spark on Google Colab and load datasets in PySpark

  2. Change column datatype, remove whitespaces and drop duplicates

  3. Remove columns with Null values higher than a threshold

  4. Group, aggregate and create pivot tables

  5. Rename categories and impute missing numeric values

  6. Create visualizations to gather insights

How Guided Projects work

Your workspace is a cloud desktop right in your browser, no download required

In a split-screen video, your instructor guides you step-by-step

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Frequently Asked Questions

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At the top of the page, you can press on the experience level for this Guided Project to view any knowledge prerequisites. For every level of Guided Project, your instructor will walk you through step-by-step.

Yes, everything you need to complete your Guided Project will be available in a cloud desktop that is available in your browser.

You'll learn by doing through completing tasks in a split-screen environment directly in your browser. On the left side of the screen, you'll complete the task in your workspace. On the right side of the screen, you'll watch an instructor walk you through the project, step-by-step.