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jihongzhao

木虫 (小有名气)

应助: 1 (幼儿园)
金币: 2496.6
帖子: 226
在线: 80.6小时
虫号: 712384
注册: 2009-03-02
性别: MM
专业: 光子与光电子器件

[交流] 【求助】求助曲线拟合的问题【已完成】

这个问题已经困扰了我很久，是关于曲线拟合的问题，采用文献中给的拟合公式怎么也拟合不好，可能是我技术的问题，也可能是这个拟合公式不合适。希望知道的虫友多多帮忙。如果使用下面的拟合公式拟合不了的话，不知道采用什么样的拟合公式更好，请大家多提宝贵意见，谢谢。只要能拟合好就行^_^ 多谢了

拟合公式为
Y=[a(1)cos(x)+a(2)sin(x)+a(3)cos(2x)+a(4)sin(2x)+a(5)cos(3x)+a(6)sin(3x)+a(7)cos(4x)+a(8)sin(4x)]*[a(1)cos(x)+a(2)sin(x)+a(3)cos(2x)+a(4)sin(2x)+a(5)cos(3x)+a(6)sin(3x)+a(7)cos(4x)+a(8)sin(4x)]+a(9)

x=
0
0.01745
0.03491
0.05236
0.06981
0.08727
0.10472
0.12217
0.13963
0.15708
0.17453
0.19199
0.20944
0.22689
0.24435
0.2618
0.27925
0.29671
0.31416
0.33161
0.34907
0.36652
0.38397
0.40143
0.41888
0.43633
0.45379
0.47124
0.48869
0.50615
0.5236
0.54105
0.55851
0.57596
0.59341
0.61087
0.62832
0.64577
0.66323
0.68068
0.69813
0.71558
0.73304
0.75049
0.76794
0.7854
0.80285
0.8203
0.83776
0.85521
0.87266
0.89012
0.90757
0.92502
0.94248
0.95993
0.97738
0.99484
1.01229
1.02974
1.0472
1.06465
1.0821
1.09956
1.11701
1.13446
1.15192
1.16937
1.18682
1.20428
1.22173
1.23918
1.25664
1.27409
1.29154
1.309
1.32645
1.3439
1.36136
1.37881
1.39626
1.41372
1.43117
1.44862
1.46608
1.48353
1.50098
1.51844
1.53589
1.55334
1.5708
1.58825
1.6057
1.62316
1.64061
1.65806
1.67552
1.69297
1.71042
1.72788
1.74533
1.76278
1.78024
1.79769
1.81514
1.8326
1.85005
1.8675
1.88496
1.90241
1.91986
1.93732
1.95477
1.97222
1.98968
2.00713
2.02458
2.04204
2.05949
2.07694
2.0944
2.11185
2.1293
2.14675
2.16421
2.18166
2.19911
2.21657
2.23402
2.25147
2.26893
2.28638
2.30383
2.32129
2.33874
2.35619
2.37365
2.3911
2.40855
2.42601
2.44346
2.46091
2.47837
2.49582
2.51327
2.53073
2.54818
2.56563
2.58309
2.60054
2.61799
2.63545
2.6529
2.67035
2.68781
2.70526
2.72271
2.74017
2.75762
2.77507
2.79253
2.80998
2.82743
2.84489
2.86234
2.87979
2.89725
2.9147
2.93215
2.94961
2.96706
2.98451
3.00197
3.01942
3.03687
3.05433
3.07178
3.08923
3.10669
3.12414
3.14159
3.15905
3.1765
3.19395
3.21141
3.22886
3.24631
3.26377
3.28122
3.29867
3.31613
3.33358
3.35103
3.36849
3.38594
3.40339
3.42085
3.4383
3.45575
3.47321
3.49066
3.50811
3.52557
3.54302
3.56047
3.57792
3.59538
3.61283
3.63028
3.64774
3.66519
3.68264
3.7001
3.71755
3.735
3.75246
3.76991
3.78736
3.80482
3.82227
3.83972
3.85718
3.87463
3.89208
3.90954
3.92699
3.94444
3.9619
3.97935
3.9968
4.01426
4.03171
4.04916
4.06662
4.08407
4.10152
4.11898
4.13643
4.15388
4.17134
4.18879
4.20624
4.2237
4.24115
4.2586
4.27606
4.29351
4.31096
4.32842
4.34587
4.36332
4.38078
4.39823
4.41568
4.43314
4.45059
4.46804
4.4855
4.50295
4.5204
4.53786
4.55531
4.57276
4.59022
4.60767
4.62512
4.64258
4.66003
4.67748
4.69494
4.71239
4.72984
4.7473
4.76475
4.7822
4.79966
4.81711
4.83456
4.85202
4.86947
4.88692
4.90438
4.92183
4.93928
4.95674
4.97419
4.99164
5.00909
5.02655
5.044
5.06145
5.07891
5.09636
5.11381
5.13127
5.14872
5.16617
5.18363
5.20108
5.21853
5.23599
5.25344
5.27089
5.28835
5.3058
5.32325
5.34071
5.35816
5.37561
5.39307
5.41052
5.42797
5.44543
5.46288
5.48033
5.49779
5.51524
5.53269
5.55015
5.5676
5.58505
5.60251
5.61996
5.63741
5.65487
5.67232
5.68977
5.70723
5.72468
5.74213
5.75959
5.77704
5.79449
5.81195
5.8294
5.84685
5.86431
5.88176
5.89921
5.91667
5.93412
5.95157
5.96903
5.98648
6.00393
6.02139
6.03884
6.05629
6.07375
6.0912
6.10865
6.12611
6.14356
6.16101
6.17847
6.19592
6.21337
6.23083
6.24828
6.26573

y=
110
101
89
79
80
89
90
90
96
92
92
90
90
87
87
84
85
84
81
71
72
69
68
66
65
59
56
48
51
49
48
43
39
39
40
44
40
46
46
48
51
50
56
56
59
64
64
67
69
76
78
77
86
87
92
96
93
94
92
97
88
91
91
91
97
89
80
80
73
78
71
74
71
67
66
66
65
61
58
59
59
55
57
59
59
56
50
54
57
66
58
62
64
68
67
67
68
67
73
70
66
65
72
63
67
68
68
55
61
59
58
57
52
50
48
51
50
40
41
35
38
38
35
40
38
36
36
39
41
48
48
48
50
51
55
62
63
67
70
73
80
80
84
90
90
92
86
96
101
99
101
98
96
96
88
77
72
79
83
82
86
82
77
74
71
70
63
68
63
61
61
60
63
63
67
70
67
66
68
71
75
77
75
75
74
73
73
76
76
80
80
83
85
86
87
80
76
82
74
77
69
71
66
63
59
52
50
48
46
42
41
41
35
43
40
42
39
42
49
49
48
50
51
60
61
60
72
74
76
79
82
78
88
88
91
90
90
94
96
98
98
93
87
89
90
96
92
86
86
76
78
82
79
72
72
72
68
64
65
66
65
64
64
67
67
64
64
72
73
76
78
82
80
80
75
76
81
89
86
89
87
88
91
87
83
85
82
82
81
75
70
71
66
66
60
57
51
49
48
48
43
44
43
40
44
39
41
41
44
44
45
42
43
44
48
53
58
61
64
68
72
66
70
78
80
79
83
85
85
83
81
81
83
82
84
78
76
82
81
78
76
73
74
74
72
75
70
70
70
66
65
65
66
65
67
70
64
62
75
96

[ Last edited by nono2009 on 2009-9-22 at 22:26 ]

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