Spline chart

A spline chart shows trends over a period of time. It works like a line chart, except that it joins the data points with a fitted curve instead of straight lines.

Use it for data that benefits from a smooth curve, for example a product life cycle or an impulse response.

Add a spline chart

1. In the designer, open the Charts tab of the Widgets pane and drag Spline Chart onto the dashboard. Resize it as required.
2. On the Assign Data tab, pick the Data source.
3. Add the number to plot to Values and the time field to Category. Optionally add a field to Series for one curve per group.
4. Name the chart and adjust its look on the Properties tab, then save the dashboard.

Every setting is described in Common chart settings.

Fill the area under the curve

A spline area chart draws the same curve and fills the area below it.