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# threshold(_:replacement:)

Creates an instance of a threshold activation layer using the threshold and replacement values you specify.

```
class func threshold(_ threshold: Float, replacement: Float) -> Self
```

## Parameters

`threshold`

The threshold value.

`replacement`

The replacement value.

## Return Value

A new `MLCActivationLayer` instance.

## Discussion

The [`threshold(_:replacement:)`](/documentation/MLCompute/MLCActivationLayer/threshold(_:replacement:)) factory type method creates an activation descriptor using [`init(type:a:b:)`](/documentation/MLCompute/MLCActivationDescriptor/init(type:a:b:)), where `type =` [`MLCActivationType.threshold`](/documentation/MLCompute/MLCActivationType/threshold), `a = threshold`, and `b = replacement`, and passes that descriptor to [`init(descriptor:)`](/documentation/MLCompute/MLCActivationLayer/init(descriptor:)).

---

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