Line Chart
Explore how to build line charts using Altair in Python to visualize continuous data that changes over time. Learn when to use line charts, how to apply the mark_line() function, and alternatives like trellis and stacked charts. This lesson helps you interpret and compare trends in time-based data effectively.
Line charts, also known as line plots or line graphs, visualize data over time. They consist of data points connected by straight lines, which makes it easy to see how the data has changed over time. Line charts are particularly useful for showing trends and patterns in data and comparing multiple data series.
When are line charts useful?
Line charts are useful when:
We know that the data is continuous and changes over time, such as stock prices, temperature data, or traffic patterns.
We want to compare multiple data series, such as comparing the sales of different products over time or tracking the performance of different stock portfolios.
We want to highlight trends and patterns, such as long-term growth or seasonal fluctuations. ...