Learners will acquire the knowledge and fundamental skills needed to use interaction in data visualization. Through guided examples and exercises using altair (a Python interface to Vega-Lite), participants will learn how use and respond to different types of selections and interactions. Specific outcomes include:

1. Be able to understand the importance of selection and highlighting
2. Be able to add point and interval selection to altair visualizations
3. Be able to add highlighting to selected marks using altair
4. Be able to add brushing between two visualizations using altair

• This courselet is designed for individuals with some foundational knowledge in Python programming and data handling.
• Suitable for data analysts, scientists, programmers, students, and researchers.
• Suitable for independent learners or as supplemental material in a classroom setting.

• This courselet emphasizes hands-on learning through interactive exercises and experiments.
• Participants will actively code and experiment with the libraries, gaining practical experience.
• The courselet includes step-by-step guidance and solutions for a seamless and engaging learning experience.