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发表于 2014-9-3 11:10
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是维数不一致造成的,我只能把代码调试的能运行,但是可能结果不一定对,你需要对前面的输入数据和网络结构做一些深入的了解- clear
0 {$ M# d7 S2 Y, n# t, B - day=[8.6187,8.3507,8.3142,8.2898,8.2791,8.2796,8.2784,8.2770,8.2770,8.2774,8.2780,8.1013,7.8087,7.3872,6.85,6.81,6.622,6.61,6.25,6.07];
1 s6 `. r- e( Z\" P& p - dayhistory=day(1:20);%取其中三十天作为历史数据样本9 v# r: O h/ F. k7 V4 k
- dayhismod=reshape(dayhistory,5,4);% 将历史数据分为6个样本,每个大小为5,其中reshape是以列排序的 K# ]8 c2 n* P1 Y0 Y* x
- dayday=day(1:15);% 取其中的前25天: \( O P) X- Y3 Y5 c
- daypost=day(6:20);%取其中的随后25天
+ y- {) ^0 j4 L7 E2 e - p=reshape(dayday,3,5);% 将前25天数据分为5行5列矩阵作为网络的训练输入样本
8 d: u/ E8 w7 _ - t=reshape(daypost,3,5); %将随后的25天分为5行5列矩阵作为网络的目标输出向量\" x: I: T2 n5 r* w9 t/ w8 }
- daylast=day(16:20);
( L+ }) [9 i% g, \: y - h3=reshape(daylast,5,1);% 将倒数第二个样本作为网络测试时的输入样本# ]) O6 d+ U6 P) k$ I! E
- r=6:20;; Z2 c/ p/ c6 F, O' E v' ^3 P' V4 ~
- rr=reshape(r,5,3);
# b5 r! @( u; d9 D - %%%%%%%%%%%%%% 新建网络bp %%%%%%%%%%%%%%%%! w- {/ ?3 i/ Y( G% k, d h\" L
- net=newff(minmax(p),[5,3],{'purelin' 'purelin'},'trainlm');* J6 d* o7 f! |: k* _7 @$ t4 a0 Y4 J# w
- y1=sim(net,p);
& m' z q. `- R5 L\" x$ c3 R7 x - % 新建网络,其中minmax(p)为p的没一次输入的最大最小值向量1 H5 ]7 |# ^* W# i6 i
- % 两层的传递函数均为purelin- v+ E3 L5 i6 ]
- % 训练函数为trainlm
2 R6 x3 N9 D4 E, D9 s7 c# I& [ - % 所训练的网络大小为[5,5]5 Z% |% I- X0 A; J: M1 V u0 r, G
- % 仿真训练前的网络, O) K0 Q4 z\" Q$ h% g0 R
% |! _: z( a1 b7 ~- %%%%%%%%%%% 进行网络训练 %%%%%%%%%%%%%%2 O) @1 L4 F3 M6 m) X
- % network parameters:
! ?. i6 f, {% G% a% v* Y - % epochs--epochs of the train6 x! w& Z6 i1 V+ c
- % goal--errors goal of the network
/ Y1 A) Z4 t- v9 N/ t6 V, {0 Z/ i' f - % lr--learning rate
$ u9 S; x5 C, h; X0 O6 c# c6 l - % shows--epochs between the displays
7 ], Z4 i1 G2 I. p - % time--Maximum time to train in seconds
7 n8 A\" [' |) K& x1 O; P$ O' [ - net.trainParam.epochs=200000; % 训练次数\" v& w, e- o* O8 f
- nettrainParam.goal=0.0001; % 误差期望值
6 U. r- |/ E( ]- n: ` - % returns of the train:7 x$ @2 R# F. f2 V1 v4 N. n
- % net--New network; a: E1 y- G- q\" u+ }, D6 T\" |
- % tr--Training record (epoch and perf).- d. w* K; ]) j6 H+ c5 b
- % Y--Network outputs.* Z# m9 K+ M% a
- % E--Network errors.
1 d/ G# O0 _5 [& u2 a9 x1 R0 {: X* M - [net,tr,Y,E]=train(net,p,t); j/ `8 J' M n
- %%%%%%%%%%% 网络测试 %%%%%%%%%%%%%%%%* ^# ~. y0 o7 V6 I
- % input the testing points here %' x% S$ M0 Y, K: _* s
- title('神经网络训练结果');
+ d7 M' p4 }7 e- |! J: l* Y0 m - xlabel('时间(天)');
7 p* N* A4 X- u0 a1 `3 c5 S7 @ - ylabel('仿真输出结果');\" P9 Z# \ ?- W8 Z, J0 b/ Q
- legend('仿真模拟值','实际值','神经网络预测值');
0 `* ~: c h! Y) l - %%%%%%%%%%%%%%%%%% 绘制误差曲面 %%%%%%%%%%%%%\" y9 Z8 g) Z4 Q5 ?5 P
- x=1:5;& }\" L9 ~0 f3 C: C
- y=1:5;
5 v7 d2 m \5 x5 j- M Z4 x - y21=sim(net,p);8 @3 E9 r* g0 o& i
- y2=reshape(y21,1,15);5 z7 ~% |1 v+ h! x5 x4 {\" X+ _+ k
- clf
\" C' |% A\" N+ _( ?- P' C - plot(r,y2,'b-^')' h; \3 u6 d0 ?/ V' a% }9 ]& E5 o: `
- hold on
; @- E8 h+ z1 Q+ J) Q - plot(1:20,day,'r-*'), }& n! P0 c0 X\" W' ~
- %%%%%%%%%%%%% 预测 %%%%%%%%%%%%%%%7 w! t3 S0 b8 r d
- y3=sim(net,h3);
; Y6 X\" O! g7 M4 [! | - plot(21:21,y3,'-*')
/ K5 P$ }+ g1 X1 n% r - hold on
+ ~# p: c6 \5 O% o+ H5 J - title('神经网络训练结果');8 o# v# Q5 K' x% U
- xlabel('时间(天)');% b, W, {9 j/ Y6 W _' s
- ylabel('仿真输出结果');
$ {; G: h( D( H+ S - legend('仿真模拟值','实际值','神经网络预测值');
2 z( r+ Z& G* C0 P1 m - %%%%%%%%%%%%%%%%%% 绘制误差曲面 %%%%%%%%%%%%%
+ s. h7 K/ {* Z* [ - x=1:5;
; _' W+ D5 z2 K - y=1:5;. T9 r: m; a Z\" [9 H1 A
- plot3(x(1:3),y(1:3),E(x(1:3),y(1:3)))
复制代码 |
昌辉9
:clear
day=[8.6187,8.3507,8.3142,8.2898,8.2791,8.2796,8.2784,8.2770,8.2770,8.2774,8.2780,8.1013,7.8087,7.3872,6.85,6.81,6.622,6.61,6.25,6.07];
dayhistory=day(1:16);%取其中三十天作为历史数据样本
dayhismod=reshape(dayhistory,4,4);% 将历史数据分为6个样本,每个大小为5,其中reshape是以列排序的
dayday=day(1:12);% 取其中的前25天
daypost=day(5:16);%取其中的随后25天
p=reshape(dayday,3,4);% 将前25天数据分为5行5列矩阵作为网络的训练输入样本
t=reshape(daypost,3,4); %将随后的25天分为5行5列矩阵作为网络的目标输出向量
daylast=day(13:16);
h3=reshape(daylast,4,1);% 将倒数第二个样本作为网络测试时的输入样本
r=5:16;
rr=reshape(r,4,3);
%%%%%%%%%%%%%% 新建网络bp %%%%%%%%%%%%%%%%
net=newff(minmax(p),[4,3],{\'purelin\' \'purelin\'},\'trainlm\');
y1=sim(net,p);
% 新建网络,其中minmax(p)为p的没一次输入的最大最小值向量
% 两层的传递函数均为purelin
% 训练函数为trainlm
% 所训练的网络大小为[5,5]
% 仿真训练前的网络
%%%%%%%%%%% 进行网络训练 %%%%%%%%%%%%%%
% network parameters:
% epochs--epochs of the train
% goal--errors goal of the network
% lr--learning rate
% shows--epochs between the displays
% time--Maximum time to train in seconds
net.trainParam.epochs=200000; % 训练次数
nettrainParam.goal=0.0001; % 误差期望值
% returns of the train:
% net--New network
% tr--Training record (epoch and perf).
% Y--Network outputs.
% E--Network errors.
[net,tr,Y,E]=train(net,p,t);
%%%%%%%%%%% 网络测试 %%%%%%%%%%%%%%%%
% input the testing points here %
title(\'神经网络训练结果\');
xlabel(\'时间(天)\');
ylabel(\'仿真输出结果\');
legend(\'仿真模拟值\',\'实际值\',\'神经网络预测值\');
%%%%%%%%%%%%%%%%%% 绘制误差曲面 %%%%%%%%%%%%%
x=1:4;
y=1:4;
y21=sim(net,p);
y2=reshape(y21,1,12);
clf
plot(r,y2,\'b-^\')
hold on
plot(1:20,day,\'r-*\')
%%%%%%%%%%%%% 预测 %%%%%%%%%%%%%%%
y3=sim(net,h3);
plot(17:2:20,y3,\'-*\')
hold on
title(\'神经网络训练结果\');
xlabel(\'时间(天)\');
ylabel(\'仿真输出结果\');
legend(\'仿真模拟值\',\'实际值\',\'神经网络预测值\');
%%%%%%%%%%%%%%%%%% 绘制误差曲面 %%%%%%%%%%%%%
x=1:4;
y=1:4;
plot3(x(1:3),y(1:3),E(x(1:3),y(1:3)))
如果是这样,应该怎样改呢,再麻烦你一下,谢谢
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