平滑线属性

在显示线条的图表中 (线条类型或 XY 类型)，您可以选择显示曲线，而不显示直线。某些选项控制这些曲线的属性。

Line properties

Line type

选择三次样条或 B 样条。

这些数学模型将影响曲线的显示。曲线通过合并多项式各段生成。

Cubic Spline interpolates your data points with polynomials of degree 3. The transitions between the polynomial pieces are smooth, having the same slope and curvature.

B-Spline uses a parametric, interpolating B-spline curve. Those curves are built piecewise from polynomials.

Resolution

The Resolution determines how many line segments are calculated to draw a piece of polynomial between two data points. You can see the intermediate points if you click any data point.

A higher value leads to a smoother line.

Degree of polynomials

对 B-样条 可以选择性地设置多项式的阶数。