---
title: PHASECurveType.sigmoid
framework: phase
role: symbol
role_heading: Case
path: phase/phasecurvetype/sigmoid
---

# PHASECurveType.sigmoid

A sigmoid curve.

## Declaration

```swift
case sigmoid
```

## Discussion

Discussion Also known as an s-curve, the sigmoid curve’s path movement is slow at either end and quick in the middle.

## See Also

### Types

- [PHASECurveType.linear](phase/phasecurvetype/linear.md)
- [PHASECurveType.squared](phase/phasecurvetype/squared.md)
- [PHASECurveType.inverseSquared](phase/phasecurvetype/inversesquared.md)
- [PHASECurveType.cubed](phase/phasecurvetype/cubed.md)
- [PHASECurveType.inverseCubed](phase/phasecurvetype/inversecubed.md)
- [PHASECurveType.sine](phase/phasecurvetype/sine.md)
- [PHASECurveType.inverseSine](phase/phasecurvetype/inversesine.md)
- [PHASECurveType.inverseSigmoid](phase/phasecurvetype/inversesigmoid.md)
- [PHASECurveType.holdStartValue](phase/phasecurvetype/holdstartvalue.md)
- [PHASECurveType.jumpToEndValue](phase/phasecurvetype/jumptoendvalue.md)