# ArticulationJacobian(int, int)

> Initializes nRows X nCols Jacobian matrix to zeroes.

## Definition

* **Type:** Constructor
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.PhysicsModule

```csharp
public ArticulationJacobian(int rows, int cols)
```

### Parameters

**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): Number of matrix rows.**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): Number of matrix columns.