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。
阶梯线
从「线条类型」中选择「阶梯线线」以绘制从点到点之间的阶梯线,而不是直线段。
点击「属性」以设置曲线的细节。
有4种阶梯线类型:
Step
Description
Start with horizontal line and step up vertically at the end.
Start to step up vertically and end with horizontal line.
Start with horizontal line, step up vertically in the middle of the X values and end with horizontal line.
Start to step up vertically to the middle of the Y values, draw a horizontal line and finish by stepping vertically to the end.