- 在线时间
- 42 小时
- 最后登录
- 2016-1-29
- 注册时间
- 2014-7-14
- 听众数
- 14
- 收听数
- 2
- 能力
- 0 分
- 体力
- 649 点
- 威望
- 0 点
- 阅读权限
- 30
- 积分
- 259
- 相册
- 0
- 日志
- 0
- 记录
- 1
- 帖子
- 134
- 主题
- 5
- 精华
- 0
- 分享
- 0
- 好友
- 27
升级   79.5% TA的每日心情 | 奋斗 2016-1-29 12:24 |
|---|
签到天数: 81 天 [LV.6]常住居民II
- 自我介绍
- 数学建模准备中...
|
gancm 发表于 2014-7-19 12:30 ' }# A" ~5 |: n* u' M, {. {: Z8 [
看了图我感觉是网络输出后面那几个值太大了,前面基本都是一条水平线了,具体哪里还看不出问题。你把修改的 ...
: o3 c8 i. Z* J- X% C+ j因为版本更新,Matlab中的Newff命令用法有所改变,原命令为:
5 ?0 |5 E" u& Y7 O8 U0 v7 enet=newff(dx,[3,7,2]{'tansig','tansig','purelin'},'traingdx');
7 S |" `* n8 N9 I9 K, D我修改为:2 p' F4 N4 I! [1 g& a. l2 S6 w* }
net=newff(p,t,[3,7,2],{'tansig','tansig','purelin'},'traingdx');
8 ~& K/ w9 H M$ T6 J- P6 ?然后有些命令被其他命令替代了,其中有premnmx,postmnmx,tramnmx命令好像被替换了,使用了一个强大的命令mapminmax。原命令为:9 ~% B' {$ _( C: f: D |
[pn,minp,maxp,tn,mint,maxt]=premnmx(p,t);9 x7 k6 a- I2 ^% i+ d. G
a=postmnmx(an,mint,maxt);5 X* L4 ~8 M: D& D+ L7 _$ B1 E5 N
pnewn=tramnmx(pnew,minp,maxp);
! o' r, r) x4 Canew=postmnmx(anewn,mint,maxt)
0 C& x6 @' w b7 f5 L% \- W- I' s% Z8 W我修改为:5 P% e) m- U# X$ Y9 I$ T* H
[pn,ps1]=mapminmax(p);[tn,ps2]=mapminmax(t);
5 ?! t7 ?* w5 G) X v+ ua=mapminmax('reverse',an,ps2);2 `! O3 U# t/ j3 n; ]$ ?) v5 i& t
pnewn=mapminmax('apply',pnew,ps1);
8 k$ @- K) J5 }2 j. y- Hanew=mapminmax('reverse',anewn,ps2)
( Y. t% T6 @% w" S, K4 ^
' t' s( t4 d/ q D8 i- M原程序为:+ K- @7 ~" E3 x+ I
%原始数据输入
' j2 l3 _# |" `5 Gclc
( ?* X& c3 z1 K$ osqrs=[20.55,22.44,25.73,27.13,29.45,30.1,30.96,34.06,36.42,38.09,39.13,39.99,...1 a" I4 p4 H7 ?3 N8 z
41.93,44.59,47.30,52.89,55.73,56.76,59.17,60.63];
. b0 Y: j* E- f& s! R3 L" t0 h, wsqjdcs=[0.6,0.75,0.85,0.90,1.05,1.35,1.45,1.60,1.70,1.85,2.15,2.20,2.25,2.35,...
, i$ o* c* w* \/ v m 2.5,2.6,2.7,2.85,2.95,3.10];
' c7 U; ]% M6 \& T- ?; Tsqglmj=[0.09,0.11,0.11,0.14,0.20,0.23,0.23,0.32,0.32,0.34,0.36,0.36,0.38,0.49,...
# F8 F2 S1 ~0 {" s8 F5 W/ |0 J 0.56,0.59,0.59,0.67,0.69,0.79];
8 g5 U O) v' c, Oglkyl=[5126,6217,7730,9145,10460,11387,12353,15750,18304,19836,21024,19490,20433,...! |& B' P g7 D( _+ L
22598,25107,33442,36836,40548,42927,43462];3 D6 M6 F6 A7 L/ b2 D: V% j/ }
glhyl=[1237,1379,1385,1399,1663,1714,1834,4322,8132,8936,11099,11203,10524,11115,.... G3 G6 Y9 P* y+ m' M
13320,16762,18673,20724,20803,21804];
7 p a' u0 o9 `5 L2 d+ x- ~/ Xp=[sqrs;sqjdcs;sqglmj];9 N0 W( F4 b* H9 j1 H
t=[glkyl;glhyl];
8 G+ I/ n# Z6 C$ s. e. r9 R: Q: v( e2 }
%数据归一化
" I7 k( Z+ {/ j: C[pn,minp,maxp,tn,mint,maxt]=premnmx(p,t);3 z- ~, s0 s3 L! P. z6 n
dx=[-1,1;-1,1;-1,1];
6 j# V9 f- b o- D0 \: D" @8 e4 U$ y; V' }- n" _
%BP网络训练
& ?4 P! ]: | @/ Y& g4 k2 Vnet=newff(dx,[3,7,2],{'tansig','tansig','purelin'},'traingdx');0 {5 P+ U8 E& S2 H) B0 D
net.trainParam.show=1000;
4 {; r$ s( M( c& Q+ p# ^net.trainParam.Lr=0.05;" Z+ {- e( d8 M1 _2 b7 m) N: D. Y
net.trainParam.epochs=50000;- z0 i* A& D& f0 \; I1 ~2 |
net.trainParam.goal=0.65*10^(-3);
7 U- A, a u& xnet=train(net,pn,tn);8 K+ t4 ^) r9 [2 k7 U6 L
$ l. G7 S* J. P5 B/ D%利用原数据对BP网络仿真8 l) T4 O, h" Q) Q. b0 M) Y, G' V Q
an=sim(net,pn);
- @) x: {5 X- k& a7 ta=postmnmx(an,mint,maxt);
" A1 C9 o" ]5 e+ ^6 K' Y
5 p; T6 B9 @* B%仿真结果与原数据对比测试3 y, N. j& p9 c( P0 `
x=1990:2009;
6 V) L$ z3 R: |' p( ` ]3 i- Vnewk=a(1, ;0 g6 J9 x4 b1 [8 M7 s5 C3 |
newh=a(2, ;2 V: c L( `0 i, o. W" j3 o
figure(2);$ S) V# B. h, d; J5 i8 e4 R ^
subplot(2,1,1);plot(x,newk,'r-o',x,glkyl,'b--+');
3 x2 J5 L4 a! z7 J/ clegend('网络输出客运量','实际客运量');
6 U% K j/ R; ], W- J- T) Pxlabel('年份');ylabel('货运量、万人');
/ |4 I3 F7 ~& Z: |& q6 Atitle('运用工具箱客运量学习和测试对比图');
& F' W( ^9 J3 S- b8 n! K9 usubplot(2,1,2);plot(x,newh,'r-o',x,glhyl,'b--+');5 v* y5 C9 g; v Z
legend('网络输出货运量','实际货运量'); q* Z6 c+ L! P5 _" E$ p
xlabel('年份');ylabel('货运量、万吨');
; Z1 L& b5 L, Q5 _title('运用工具箱货运量学习和测试对比图');
9 G/ b9 v7 P. e6 [, D7 t1 i( s
' Y1 ?1 i0 S! J3 u$ H%新数据仿真
; P9 q: [: C5 @* J' Upnew=[73.39,75.55
' X; C3 t- o! o! U" w/ V8 m: e 3.9635,4.0975
# K0 B( g6 ^- }# X) p 0.9880,1.0268];
9 J/ k7 |# x/ `6 v) N2 G zpnewn=tramnmx(pnew,minp,maxp);
, U7 u9 w b0 F% u& i1 U; Hanewn=sim(net,pnewn);' l, p' W5 ^/ f2 N9 p2 q/ D
anew=postmnmx(anewn,mint,maxt)' s, ]6 `3 w6 S0 s8 o0 E9 l
& A* F |' @ C; Z
修改后程序为:
W- ~ e" m/ ~; ~%原始数据输入
- |9 n8 ^# ]9 d9 d V! q* Rclc5 A/ [6 |6 i+ J- ]8 I" h
sqrs=[20.55,22.44,25.73,27.13,29.45,30.1,30.96,34.06,36.42,38.09,39.13,39.99,..." i z; c+ {9 m2 E+ i5 B& J: W- d: O5 Z
41.93,44.59,47.30,52.89,55.73,56.76,59.17,60.63];
; ?9 Q9 Y: }4 K9 s e' z0 _sqjdcs=[0.6,0.75,0.85,0.90,1.05,1.35,1.45,1.60,1.70,1.85,2.15,2.20,2.25,2.35,...
& a6 b8 O( i* B8 h. S- m 2.5,2.6,2.7,2.85,2.95,3.10];. E# {: c* U. l- `6 X) \1 U
sqglmj=[0.09,0.11,0.11,0.14,0.20,0.23,0.23,0.32,0.32,0.34,0.36,0.36,0.38,0.49,...
) U. u" M: `, M+ t 0.56,0.59,0.59,0.67,0.69,0.79];9 b1 W3 Q0 X `& ~$ J: U+ R
glkyl=[5126,6217,7730,9145,10460,11387,12353,15750,18304,19836,21024,19490,20433,...
% {9 O/ M9 N: a: x. s 22598,25107,33442,36836,40548,42927,43462]; [& |. t. A' _. }$ R
glhyl=[1237,1379,1385,1399,1663,1714,1834,4322,8132,8936,11099,11203,10524,11115,...
' M+ M; ~1 J8 V, W% y) N 13320,16762,18673,20724,20803,21804];* j4 c7 Z) B. \4 M
p=[sqrs;sqjdcs;sqglmj];, l$ h' N2 F H* Y# h+ x @
t=[glkyl;glhyl];
, N4 F m8 W3 V" z. `* e
0 ]" z) K7 @# j- g3 i& @/ s6 h9 U%数据归一化' ]3 ?: P! o0 I# h
[pn,ps1]=mapminmax(p);( p9 Y# r; [' z- P
[tn,ps2]=mapminmax(t); k1 b9 @6 c R; U+ A/ n. }
! [: K% J4 U3 v) R7 a. q! {%BP网络训练
8 ]( c3 T6 I5 l- ~4 L" j# C2 ?net=newff(p,t,[3,7,2],{'tansig','tansig','purelin'},'traingdx');
$ p1 c6 U# l2 @ j5 |net.trainParam.show=1000;
! K! |! c# w% ?0 i9 Z! n: @net.trainParam.Lr=0.05;
; u/ p. f2 f n; ?9 l4 b( enet.trainParam.epochs=50000;; a% R0 j- X( Y0 W. Y7 g
net.trainParam.goal=0.65*10^(-3);* T' M0 n ], V. a, F
net=train(net,pn,tn);5 S3 ~1 y$ s, }/ i& l5 t: S' K
& z( a" ^6 ~2 f# `$ F%利用原数据对BP网络仿真
( R6 Z5 [$ ?4 Z9 ?. R3 {an=sim(net,pn);7 E2 w: u" r+ i; Y+ |. S
a=mapminmax('reverse',an,ps2);6 [) `2 L% x7 ^, X/ ]3 ?$ J, \
* k2 c1 }2 D6 p. q s! b7 ]" [
%仿真结果与原数据对比测试
7 G# q% Q9 J, e$ @6 [* dx=1990:2009;
- F" a% ]. f$ mnewk=a(1, ;
& W9 N: p- L, W/ C2 o' rnewh=a(2, ;% R: ? v2 k8 Q1 e& r v7 H
figure(2);
* a2 E( l+ f; `$ l3 dsubplot(2,1,1);plot(x,newk,'r-o',x,glkyl,'b--+');* i* S4 R5 Q( d
legend('网络输出客运量','实际客运量');
6 p0 F5 Z8 w* z, T9 v% Fxlabel('年份');ylabel('货运量、万人');0 V1 E7 O$ O4 U6 O) A- [
title('运用工具箱客运量学习和测试对比图');
! I3 S. h: l* v) \$ C3 Z, `# Usubplot(2,1,2);plot(x,newh,'r-o',x,glhyl,'b--+');7 T: d# m0 y; L; e% {" h2 K5 Q
legend('网络输出货运量','实际货运量');. e3 c6 U8 U% D+ f) _
xlabel('年份');ylabel('货运量、万吨');
8 X; D( b) X) @; W0 m. [. jtitle('运用工具箱货运量学习和测试对比图');9 j" N* c! P# D& H9 n6 M, N
, j2 w- r& K4 F+ ?6 ^. ]0 u
%新数据仿真& {- f/ v# {5 e! T$ @8 {' V
pnew=[73.39,75.55: W" s& o& u& w) V% ~9 r; |
3.9635,4.0975
x9 t/ \2 i3 H3 ^* W2 O 0.9880,1.0268];
) H, [+ |/ i" D0 T7 g$ I3 epnewn=mapminmax('apply',pnew,ps1);
; i. K9 p" a, m$ W2 R( k) @anewn=sim(net,pnewn);
, v( ^; C z7 z8 P9 {anew=mapminmax('reverse',anewn,ps2)8 `5 \+ S7 s6 C. ?( p" A' g
(修改的地方用颜色标记了)4 }) o# w0 ?$ @3 {5 A/ Y- g# N1 `
麻烦您帮忙指出其中的问题,万分感谢! |
|