# SetColumn(int, Vector4)

> Sets a column of the matrix.

## Definition

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

```csharp
public void SetColumn(int index, Vector4 column)
```

### Parameters

**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): **** (\[Vector4]\(/engine/6000.0/script-reference/unityengine/vector4)): 

### Remarks

You use this to build transformation matrices using right, up and forward vectors:

```csharp
using UnityEngine;

public class ExampleScript : MonoBehaviour
{
    // build a matrix from a transform.
    Matrix4x4 matrix = new Matrix4x4();

    /// Build a matrix from a transform.
    void Start()
    {
        matrix.SetColumn(0, transform.right);
        matrix.SetColumn(1, transform.up);
        matrix.SetColumn(2, transform.forward);
        var p = transform.position;
        matrix.SetColumn(3, new Vector4(p.x, p.y, p.z, 1));
    }
}
```

The i-th column is set from v. i must be from 0 to 3 inclusive.

Additional Resources: [Matrix4x4.GetColumn](/engine/6000.0/script-reference/unityengine/matrix4x4/getcolumn.md).