A type of chart that is functionally identical to an Area chart, except using a curved line.
Example of a Spline Area chart.
| Number of Series | 1 or more |
| Y-Axis Values Per Data Point |
1 |
| Supports Markers | Yes |
| Supports Strip Lines | Yes |
| Incompatible With | Bar, Doughnut, Funnel, Pie, Polar, Pyramid, Radar, Stacked Bar |