# Matrix.Scale(Double, Double) Method

## Definition

Appends the specified scale vector to this Matrix structure.

``````public:
void Scale(double scaleX, double scaleY);``````
``public void Scale (double scaleX, double scaleY);``
``member this.Scale : double * double -> unit``
``Public Sub Scale (scaleX As Double, scaleY As Double)``

#### Parameters

scaleX
Double

The value by which to scale this Matrix along the x-axis.

scaleY
Double

The value by which to scale this Matrix along the y-axis.

## Examples

The following example shows how to scale a Matrix structure.

``````
private Matrix scaleExample()
{
Matrix myMatrix = new Matrix(5, 10, 15, 20, 25, 30);

// Scale myMatrix by a horizontal factor of 2
// and a vertical factor of 4 about the origin.
// After this operation,
// myMatrix is equal to (10, 40, 30, 80, 50, 120)
myMatrix.Scale(2, 4);

return myMatrix;
}

{
Matrix myMatrix = new Matrix(5, 10, 15, 20, 25, 30);

// Scale myMatrix by a horizontal factor of 2
// and a vertical factor of 4 about the
// point (100,100).
// After this operation,
// myMatrix is equal to (10, 40, 30, 80, -50, -180)
myMatrix.ScaleAt(2, 4, 100, 100);

return myMatrix;
}

``````