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用以下的数据怎样在matlab里建立一个BP神经网络模型？求高手帮忙！！最好是有详细步骤以及代码
年份
WTI(美元/桶)
-1
54.26
-2
59.28
-3
63.99
-4
64.43
-5
63.50
-6
67.49
-7
73.99
-8
72.36
-9
79.62
-10
85.80
-11
94.95
-12
91.80
-1
92.99
-2
95.40
-3
105.32
-4
112.58
-5
125.68
-6
133.88
-7
131.26
-8
116.68
-9
104.65
-10
76.61
-11
57.15
-12
40.77
-1
41.55
-2
39.01
-3
47.94
-4
49.76
-5
59.13
-6
69.64
-7
64.26
-8
71.05
-9
69.34
-10
75.72
-11
77.95
-12
74.57
-1
78.36
-2
76.27
-3
81.20
-4
84.30
-5
73.76
-6
75.34
-7
76.13
-8
76.56
-9
75.21
-10
81.89
-11
84.21
-12
89.22
-1
89.28
-2
88.40
-3
102.85
-4
109.64
-5
100.89
-6
96.27
-7
97.18
-8
86.33
-9
85.56
-10
86.32
-11
97.08
-12
98.56
-8
95.14
-9
94.82
-10
89.27
-11
86.71
-12
87.99
-1
94.82
-2
94.59
-3
92.96
-4
94.86
