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# BNNSActivationFunctionClamp

An activation function that returns its input clamped to the specified range.

```
BNNSActivationFunctionClamp
```

## Discussion

This constant defines an activation function that returns values using the following operation:

```c
min(max(x, alpha), beta)
```

Use `alpha` and `beta` to specify the clamping range:

```swift
var activation = BNNSActivation(function: .clamp, 
                                alpha: -5, 
                                beta: 5)
```

The following illustrates the output that the activation function generates from inputs in the range `-10...10`:

![Graph that shows input values for the activation function on horizontal axis and its output values on vertical axis. ](images/com.apple.accelerate/media-3401544@2x.png)

---

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