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# tileBackward(outputGradient:generatingInputGradient:filterParameters:)

Applies a tile filter backward to generate an input gradient.

```
static func tileBackward(outputGradient: BNNSNDArrayDescriptor, generatingInputGradient inputGradient: BNNSNDArrayDescriptor, filterParameters: BNNSFilterParameters? = nil) throws
```

## Parameters

`outputGradient`

The output gradient descriptor.

`inputGradient`

The input gradient descriptor.

`filterParameters`

The runtime filter parameters.

## See Also

[`func BNNSTileBackward(UnsafeMutablePointer<BNNSNDArrayDescriptor>, UnsafePointer<BNNSNDArrayDescriptor>, UnsafePointer<BNNSFilterParameters>?) -> Int32`](/documentation/Accelerate/BNNSTileBackward(_:_:_:))

Applies a tile filter backward to generate an input gradient.


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