How to Create Dummy Variables in Python with Pandas: A Beginners Guide

Описание: In this short Python tutorial, you will get the answer to the question "how do you create a dummy variable in Python?". Here, you will use Pandas read_csv, head, unique, and get_dummies method. Note, the last one is what you will use to create dummy variables.

First, you will learn how to read your data from a csv file and have a quick look at the created Pandas dataframe. Second, you will learn how to create dummy variables in Python using pandas pd.get_dummies method:

1) Add prefix
2) Remove prefix

After that, you have used a categorical variable with to levels, you will learn how to create dummy variables of a categorical variable with 3 levels. After that, you will learn how to make dummy variables from more than one column and how to change the prefix and prefix separator of your new dummy variables.

» Make sure you subscribe to the channel if you haven't: http://bit.ly/SUB2EM

» Blog post about creating dummy variables in Python: https://bit.ly/DummyVariablePython

» Jupyter Notebook: https://bit.ly/ipynbDummies

» Link to the dataset used: http://vincentarelbundock.github.io/R...

» How to install Pandas:    • How to Install Pandas in Python  

If you need to learn more about importing data from CSV files with Pandas:

» Blog post: http://bit.ly/pandas_read_csv

» YouTube Video:    • Pandas Read CSV Tutorial: skiprows, usecol...  

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0:00 Introduction
1:35 Importing data from CSV
2:30 Get the levels of categorical variables
3:08 Example 1: Making a dummy variable (2 factors)
4:18 Example 2: Add the dummy variables to a dataframe
5:15 Example 2: Creating a new dataframe (with dummy vars)
5:33 Removing the prefix from the columns
6:01 Example 3: Categorical variable with 3 factors
6:48 Example 4: Dummy coding 2 columns (variables)
7:04 Example 5: From 3 columns (variables)
7:36 Changing the prefix and prefix separator
8:07 Outro & conclusion: why dummy coding?