x y z class
1 7.522090573 0.0947621201 0.9192131 1
2 8.377329857 0.9239476238 1.0268833 1
3 10.410897014 2.0579569672 1.0897411 1
4 10.010138206 -0.3497298457 0.9102357 1
5 9.491516152 1.8705499267 1.0703253 1
6 7.786660913 -0.4463353869 1.0122466 2
7 5.780161404 1.1631841759 0.9662667 2
8 7.554845700 1.9681194910 1.0456867 2
9 6.922824035 -0.2138662050 0.9436512 2
10 10.135732626 1.8476083237 0.9615607 2
11 6.353756197 0.5373878078 0.9589364 3
12 6.287035692 -0.8354052695 0.9137127 3
13 9.407254887 3.2034614134 1.0970670 3
14 5.354989965 0.4835880495 1.0722515 3
15 6.959790979 -1.5402692379 1.0640177 3
我的数据采用这种形式我想一次计算一个班级每个功能的 Fisher得分。谁能建议我如何在R中实现？