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P=[0.1093,0.1110,0.1127,0.1141,0.1154,0.1164,0.1171,0.1175,0.1178,0.1179,0.1179,0.1179,0.1179,0.1180,0.1182];* G7 S/ D" ~: l* M8 j8 B O, N8 W2 N
T=[0.1110,0.1127,0.1141,0.1154,0.1164,0.1171,0.1175,0.1178,0.1179,0.1179,0.1179,0.1179,0.1180,0.1182,0.1185];( N& `) i) [6 i' P" \
% 创建一个新的前向神经网络
! d* v& K! P4 _% q2 p% unet_1=newff(minmax(P),[10,1],{'tansig','purelin'},'traingdm')
+ {& o/ C4 c% O- W$ s% 当前输入层权值和阈值
; p6 W2 [9 X' ?2 w( r0 JinputWeights=net_1.IW{1,1}2 s+ y: w2 P( G4 q
inputbias=net_1.b{1}
1 t8 g" v1 h3 O8 A( v% 当前网络层权值和阈值2 N7 m- |5 f4 K, w; o( B
layerWeights=net_1.LW{2,1}
. `* }6 k i Y# j! {! @layerbias=net_1.b{2}: A N4 a, [4 E" {# i3 Z
% 设置训练参数3 u! I7 g$ z/ \4 G
net_1.trainParam.show = 50;
# m' J- v, p$ [3 K- U& v' pnet_1.trainParam.lr = 0.05;
$ w! _, y, _: o/ [) |6 }5 I" U: k& rnet_1.trainParam.mc = 0.9;
6 [, O6 ~: `1 E3 f7 m# [8 d, Qnet_1.trainParam.epochs = 10000;! _# c8 o) t p
net_1.trainParam.goal = 1e-3;
6 C; j: A: |5 v) F# i& }% 调用 TRAINGDM 算法训练 BP 网络
5 C" d1 C' T6 ]. }8 y8 z5 \: D[net_1,tr]=train(net_1,P,T);
0 p4 O1 j1 A& b# u" t% 对 BP 网络进行仿真
* Q4 Z( b3 H1 u) H+ a" K c9 kA = sim(net_1,P);7 Y' ]1 A8 r( R. S9 z) H
% 计算仿真误差 ) e( n6 }' T$ v' {% Y- T7 P" a
E = T - A;, U" r% v8 b) W" M& I
MSE=mse(E)( ]0 G) N! n9 _- O3 b$ G
x=[0.1110,0.1127,0.1141,0.1154,0.1164,0.1171,0.1175,0.1178,0.1179,0.1179,0.1179,0.1179,0.1180,0.1182,0.1185]';%测试
5 L% r4 p" s. u; D* |" Nsim(net_1,x) o- e6 I# D7 m! y3 V3 c) }
这段程序是根据14年的数据,来预测下一年的,怎么算不出来啊 。
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