[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [Mat3](./rc-js-util.mat3.md) > [setRow](./rc-js-util.mat3.setrow.md) ## Mat3.setRow() method **Signature:** ```typescript setRow(_row: number, _writeFrom: IReadonlyVec3): void; ``` ## Parameters

Parameter	Type	Description
\_row	number
\_writeFrom	[IReadonlyVec3](./rc-js-util.ireadonlyvec3.md)<[TTypedArray](./rc-js-util.ttypedarray.md)>

**Returns:** void