# SignFunction class

Namespace: [Grasshopper2.Types.Functions.Standard](https://developer.rhino3d.com/api/gh2/namespace/grasshopper2.types.functions.standard.md) · Assembly: [Grasshopper2](https://developer.rhino3d.com/api/gh2/assembly/grasshopper2.md)

```cs
[IoId("00000000-e804-481e-a54b-f0f0ce270709")]
public sealed class SignFunction : FunctionF<Function>
```

The sign of a function.

## Constructors

- [SignFunction](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.standard.signfunction/ctor.md): (2 overloads)

## Properties

- [Notation](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.standard.signfunction/notation.md)

## Methods

- [EmitDerivative](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.standard.signfunction/emitderivative.md)
- [Poles](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.standard.signfunction/poles.md): The sign of an infinity is still just +1 or -1, so an operand pole shows up here as an ordinary step rather than a pole of its own. Holes are left to the base relay: the sign of an undefined value is still undefined.
- [Y](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.standard.signfunction/y.md)

## Inherited Members

- From [FunctionF<T1>](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.functionf-1.md): [F](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.functionf-1/f.md), [DomainEstimate](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.functionf-1/domainestimate.md), [Holes](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.functionf-1/holes.md), [Store](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.functionf-1/store.md)
- From [FunctionWithCaching](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.functionwithcaching.md): [Derivative](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.functionwithcaching/derivative.md), [Integral](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.functionwithcaching/integral.md), [Nomen](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.functionwithcaching/nomen.md), [EmitIntegral](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.functionwithcaching/emitintegral.md)
- From [Function](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.function.md): [Ui](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.function/ui.md), [Asymptotes](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.function/asymptotes.md), [AutoCoDomain](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.function/autocodomain.md), [Integrate](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.function/integrate.md), [YYYY](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.functions.function/yyyy.md)