How to Add a Horizontal Line at y=0 in an Altair Line Chart

What will you learn? Learn how to draw a horizontal line across an Altair line chart precisely at y=0. Explore Altair’s layering approach to customize and enhance visualizations effortlessly. Introduction to the Problem and Solution Adding a horizontal line at y=0 serves as a valuable tool for emphasizing specific points or highlighting thresholds within a … Read more