diff --git a/CustomView/Advance/[10]Matrix_Method.md b/CustomView/Advance/[10]Matrix_Method.md
index 0010643..cf39d65 100644
--- a/CustomView/Advance/[10]Matrix_Method.md
+++ b/CustomView/Advance/[10]Matrix_Method.md
@@ -143,8 +143,40 @@ void mapPoints (float[] dst, int dstIndex,float[] src, int srcIndex, int pointCo
 
 (1) `void mapPoints (float[] pts)` 方法仅有一个参数，pts数组作为参数传递原始数值，计算结果仍存放在pts中。
 
+示例:
+
+``` java
+
+	// 初始数据为三个点 (0, 0) (80, 100) (400, 300) 
+	float[] pts = new float[]{0, 0, 80, 100, 400, 300};
+	
+	// 构造一个matrix，x坐标缩放0.5
+	Matrix matrix = new Matrix();
+	matrix.setScale(0.5f, 1f);
+	
+	// 输出pts计算之前数据
+	Log.i(TAG, "before: "+ Arrays.toString(pts));
+	
+	// 调用map方法计算
+	matrix.mapPoints(pts);
+	
+	// 输出pts计算之后数据
+	Log.i(TAG, "after : "+ Arrays.toString(pts));
+```
+
+结果:
+
+```
+before: [0.0, 0.0, 80.0, 100.0, 400.0, 300.0]
+after : [0.0, 0.0, 40.0, 100.0, 200.0, 300.0]
+```
+
 (2) `void mapPoints (float[] dst, float[] src)` ，src作为参数传递原始数值，计算结果存放在dst中。
 
+```
+```
+
+
 (3) `void mapPoints (float[] dst, int dstIndex,float[] src, int srcIndex, int pointCount)` 可以指定只计算一部分数值。