matlab怎么样把两组数据画在一张图上?

matlab怎么样把两组数据画在一张图上?
x5=[1554.409
1554.4174
1554.4238
1554.4278
1554.4312
1554.4348
1554.4376
1554.4458
1554.4524
]';
x15=[1554.4084
1554.418
1554.4232
1554.4286
1554.4354
1554.4412
1554.4448
1554.4488
1554.452];
y=[52 100 200 300 400 500 600 700 800];就如这个