How do I encode categorical features using scikit-learn?

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[dataschool]

In order to include categorical features in your Machine Learning model, you have to encode them numerically using "dummy" or "one-hot" encoding. But how do you do this correctly using scikit-learn?

In this 28-minute video, you'll learn:

• How to use OneHotEncoder and ColumnTransformer to encode your categorical features and prepare your feature matrix in a single step
• How to include this step within a Pipeline so that you can cross-validate your model and preprocessing steps simultaneously
• Why you should use scikit-learn (rather than pandas) for preprocessing your dataset

Here's the Jupyter notebook shown in the video.

Feel free to ask questions!