---
title: MPSCNNReductionType.sumByNonZeroWeights
framework: metalperformanceshaders
role: symbol
role_heading: Case
path: metalperformanceshaders/mpscnnreductiontype/sumbynonzeroweights
---

# MPSCNNReductionType.sumByNonZeroWeights

## Declaration

```swift
case sumByNonZeroWeights
```