# CurveGraphObject.YAxis enum

Namespace: [Grasshopper2.Parameters.Special](https://developer.rhino3d.com/api/gh2/namespace/grasshopper2.parameters.special.md) · Assembly: [Grasshopper2](https://developer.rhino3d.com/api/gh2/assembly/grasshopper2.md)

```cs
public enum CurveGraphObject.YAxis
```

Selects which curve property is plotted on the graph's y-axis.

## Values

| Name | Value | Description |
| --- | --- | --- |
| X | 0 | X coordinate of the sample point. |
| Y | 1 | Y coordinate of the sample point. |
| Z | 2 | Z coordinate of the sample point. |
| ArcLength | 3 | Arc-length from the start of the curve to the sample point. |
| Parameter | 4 | The curve parameter itself. |
| Distance | 5 | Straight-line distance from the sample point to the start of the curve. |
| Derivative | 6 | Magnitude of the first derivative of the curve (speed with respect to parameter). |
| Curvature | 7 | Magnitude of the curvature vector. |
| Torsion | 8 | Signed torsion of the curve at the sample point (rate of change of the binormal). Zero for planar curves. |