---
title: "init(sources:gradientState:lossDescriptor:isLabelsGradientFilter:)"
framework: metalperformanceshaders
role: symbol
role_heading: Initializer
path: "metalperformanceshaders/mpsnnlossgradientnode/init(sources:gradientstate:lossdescriptor:islabelsgradientfilter:)"
---

# init(sources:gradientState:lossDescriptor:isLabelsGradientFilter:)

## Declaration

```swift
init(sources sourceNodes: [MPSNNImageNode], gradientState: MPSNNGradientStateNode?, lossDescriptor descriptor: MPSCNNLossDescriptor, isLabelsGradientFilter: Bool)
```