?? 新建 文本文檔.txt
字號:
load d:\exercise\iris\train.txt
load d:\exercise\iris\test.txt
a=train(:,1:4);
b=test(:,1:4);
ma=mean(a(1:25,:));
ma(2:2,:)=mean(a(26:50,:));
ma(3:3,:)=mean(a(51:75,:));
mb=mean(b(1:25,:));
mb(2:2,:)=mean(b(26:50,:));
mb(3:3,:)=mean(b(51:75,:));
stda=std(a(1:25,:));
stda(2:2,:)=std(a(26:50,:));
stda(3:3,:)=std(a(51:75,:));
stdb=std(b(1:25,:));
stdb(2:2,:)=std(b(26:50,:));
stdb(3:3,:)=std(b(51:75,:));
?stda
stda =
0.4005 0.3686 0.1979 0.1046
0.5480 0.3527 0.4438 0.2063
0.7242 0.3612 0.6461 0.2551
?stdb
stdb =
0.3037 0.3906 0.1492 0.1118
0.4813 0.2767 0.4983 0.1913
0.5485 0.2784 0.4339 0.2971
?ma =
5.0280 3.4800 1.4600 0.2480
6.0120 2.7760 4.3120 1.3440
6.5760 2.9280 5.6400 2.0440
?mb
mb =
4.9840 3.3560 1.4680 0.2400
5.8600 2.7640 4.2080 1.3080
6.6000 3.0200 5.4640 2.0080
?sigma1=cov(a(1:25,:))
sigma1 =
0.1604 0.1181 0.0241 0.0194
0.1181 0.1358 0.0062 0.0223
0.0241 0.0062 0.0392 0.0066
0.0194 0.0223 0.0066 0.0109
?sigma2=cov(a(26:50,:))
sigma2 =
0.3003 0.1095 0.1865 0.0520
0.1095 0.1244 0.0886 0.0465
0.1865 0.0886 0.1969 0.0640
0.0520 0.0465 0.0640 0.0426
?sigma3=cov(a(51:75,:))
sigma3 =
0.5244 0.1215 0.4322 0.0619
0.1215 0.1304 0.0988 0.0604
0.4322 0.0988 0.4175 0.0673
0.0619 0.0604 0.0673 0.0651
sigma_1=inv(cov(a(1:25,:)))
sigma_1 =
20.9151 -19.0249 -11.2193 8.2970
-19.0249 28.5286 12.4840 -31.7589
-11.2193 12.4840 34.8879 -26.4714
8.2970 -31.7589 -26.4714 157.2867
?sigma_2=inv(cov(a(26:50,:)))
sigma_2 =
9.5256 -4.4293 -9.4390 7.4140
-4.4293 16.3236 1.7437 -15.0557
-9.4390 1.7437 19.7833 -20.1460
7.4140 -15.0557 -20.1460 61.2028
?sigma_3=inv(cov(a(51:75,:)))
sigma_3 =
15.0399 -5.4507 -15.3497 6.6272
-5.4507 16.1401 4.0828 -14.0152
-15.3497 4.0828 18.6957 -8.5254
6.6272 -14.0152 -8.5254 30.8896
a1=diag((a-ones(75,1)*mean(a(1:25,:)))*inv(cov(a(1:25)))*(a-ones(75,1)*mean(a(1:25,:)))')
a1 =
0.0716
1.5750
1.3332
2.0662
0.1314
2.4651
1.2210
0.0691
4.5919
1.1487
1.1886
0.5004
1.9191
5.6839
5.8360
8.2445
2.2657
0.0741
3.8289
0.6974
1.2758
0.4880
2.5649
0.9891
1.5850
98.4327
79.5962
106.2740
57.1794
87.6145
70.1992
87.1134
32.0001
85.8543
49.3581
43.1225
62.7419
59.8397
82.9646
39.5796
80.4738
70.8499
54.4743
86.1485
49.6598
89.7762
57.1570
99.6020
81.1271
71.0020
170.3729
107.1042
172.4522
134.0288
156.0965
228.7248
76.8337
195.3004
155.8298
195.3029
115.7134
124.4473
144.1215
106.0446
118.0496
130.3787
131.6901
240.0367
260.0350
103.9827
160.6342
97.8144
237.6631
102.6513
151.0627
?exp(-a1/2)
ans =
0.9648
0.4550
0.5135
0.3559
0.9364
0.2915
0.5431
0.9660
0.1007
0.5631
0.5520
0.7786
0.3831
0.0583
0.0540
0.0162
0.3221
0.9636
0.1474
0.7056
0.5284
0.7835
0.2774
0.6098
0.4527
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
a2=diag((a-ones(75,1)*mean(a(26:50,:)))*inv(cov(a(26:50)))*(a-ones(75,1)*mean(a(26:50,:)))')
a2 =
37.1150
36.8845
40.9036
37.6825
38.2713
31.1443
39.8073
35.4005
41.3046
35.9560
34.7837
35.0422
38.4538
49.4414
41.7509
38.4099
38.6363
36.3863
30.1679
36.2265
29.6243
34.9156
49.7917
28.7784
29.9227
4.3615
1.2988
4.2083
1.9583
1.1523
0.4503
1.9103
8.3939
1.4853
2.7909
8.0062
0.3317
1.8237
0.5888
2.3113
1.9623
0.9312
0.7127
1.4214
1.5826
2.1261
0.3583
1.7624
0.5981
0.5595
15.1306
3.2664
14.4112
6.5448
10.7744
27.9032
4.9116
19.4307
9.8965
22.0591
4.8930
4.8011
8.8388
3.5875
5.9334
7.3948
6.3530
34.4134
34.9423
2.7629
12.6847
3.1519
29.9161
2.1394
10.8104
?exp(-a2/2)
ans =
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.1130
0.5223
0.1220
0.3756
0.5621
0.7984
0.3848
0.0150
0.4758
0.2477
0.0183
0.8472
0.4018
0.7450
0.3149
0.3749
0.6278
0.7002
0.4913
0.4533
0.3454
0.8360
0.4143
0.7415
0.7560
0.0005
0.1953
0.0007
0.0379
0.0046
0.0000
0.0858
0.0001
0.0071
0.0000
0.0866
0.0907
0.0120
0.1663
0.0515
0.0248
0.0417
0.0000
0.0000
0.2512
0.0018
0.2068
0.0000
0.3431
0.0045
?a3=diag((a-ones(75,1)*mean(a(51:75,:)))*inv(cov(a(51:75)))*(a-ones(75,1)*mean(a(51:75,:)))')
a3 =
45.5448
46.1329
49.2550
46.6707
46.3640
39.1955
47.9529
44.3297
49.7973
45.3038
42.9422
44.0482
47.5135
56.3999
47.4167
43.4334
45.5112
44.8606
38.3160
44.0887
39.1489
43.1291
55.8469
38.5669
39.5974
2.9598
3.2427
1.8652
9.1443
2.6691
5.0284
2.4701
18.4083
3.1207
10.2740
17.1901
5.3999
8.8507
2.9094
10.8095
3.8087
4.8690
7.8484
4.3228
9.6386
2.4716
6.6478
2.1032
3.5067
4.5402
1.0528
1.8431
0.6684
0.2633
0.1161
3.7729
8.4098
1.9453
0.5410
2.4037
0.7119
0.4182
0.1489
2.5974
1.9773
0.5456
0.1718
6.0482
5.7668
2.9887
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