A Spline Area Chart uses smooth curves instead of straight segments to connect data points, with the region below each curve filled for visual emphasis. When data is incomplete, the chart gracefully handles null values by breaking the area at the gap and resuming on the next valid point.
This sample compares average monthly humidity in two fictional cities -- Gotham and Mos Eisley. The Mos Eisley series contains two missing data points (March and August), demonstrating how to represent gaps by placing null values in the dataset. A tooltip valuePostfix appends "%" to hover values, and custom scale min/max settings frame the Y axis from 0 to 100.
Follow the step-by-step Area Chart Tutorial to learn how such charts are built. See the Area Chart documentation for all configuration options.