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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)
2007-1
54.26
2007-2
59.28
2007-3
63.99
2007-4
64.43
2007-5
63.50
2007-6
67.49
2007-7
73.99
2007-8
72.36
2007-9
79.62
2007-10
85.80
2007-11
94.95
2007-12
91.80
2008-1
92.99
2008-2
95.40
2008-3
105.32
2008-4
112.58
2008-5
125.68
2008-6
133.88
2008-7
131.26
2008-8
116.68
2008-9
104.65
2008-10
76.61
2008-11
57.15
2008-12
40.77
2009-1
41.55
2009-2
39.01
2009-3
47.94
2009-4
49.76
2009-5
59.13
2009-6
69.64
2009-7
64.26
2009-8
71.05
2009-9
69.34
2009-10
75.72
2009-11
77.95
2009-12
74.57
2010-1
78.36
2010-2
76.27
2010-3
81.20
2010-4
84.30
2010-5
73.76
2010-6
75.34
2010-7
76.13
2010-8
76.56
2010-9
75.21
2010-10
81.89
2010-11
84.21
2010-12
89.22
2011-1
89.28
2011-2
88.40
2011-3
102.85
2011-4
109.64
2011-5
100.89
2011-6
96.27
2011-7
97.18
2011-8
86.33
2011-9
85.56
2011-10
86.32
2011-11
97.08
2011-12
98.56
2012-8
95.14
2012-9
94.82
2012-10
89.27
2012-11
86.71
2012-12
87.99
2013-1
94.82
2013-2
94.59
2013-3
92.96
2013-4
94.86