<!--
{
  "availability" : [
    "iOS: 11.3.0 -",
    "iPadOS: 11.3.0 -",
    "macCatalyst: 13.0.0 -",
    "macOS: 10.13.4 -",
    "tvOS: 11.3.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "MetalPerformanceShaders",
  "identifier" : "/documentation/MetalPerformanceShaders/MPSCNNNeuronLogarithmNode/init(source:a:b:c:)",
  "metadataVersion" : "0.1.0",
  "role" : "Initializer",
  "symbol" : {
    "kind" : "Initializer",
    "modules" : [
      "Metal Performance Shaders"
    ],
    "preciseIdentifier" : "c:objc(cs)MPSCNNNeuronLogarithmNode(im)initWithSource:a:b:c:"
  },
  "title" : "init(source:a:b:c:)"
}
-->

# init(source:a:b:c:)

```
init(source sourceNode: MPSNNImageNode, a: Float, b: Float, c: Float)
```

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)