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# sigmoidGradient(withIncomingGradient:sourceTensor:name:)

Computes the gradient of the sigmoid function using the incoming gradient tensor.

```
func sigmoidGradient(withIncomingGradient gradient: MPSGraphTensor, sourceTensor source: MPSGraphTensor, name: String?) -> MPSGraphTensor
```

## Parameters

`gradient`

The incoming gradient tensor.

`source`

The input tensor.

`name`

The name for the operation.

## Return Value

A valid [`MPSGraphTensor`](/documentation/MetalPerformanceShadersGraph/MPSGraphTensor) object

---

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