ä½ è¿æ¯å¨åæ¶é´åºåå¢ã
ä½ å¯ä»¥å»ãç¥ç»ç½ç»ä¹å®¶ãnnetinfo----ãå¦ä¹ æç¨äº--->ç¥ç»ç½ç»å¨æ¶é´åºåä¸çåºç¨
ä¸é¢æ讲解ãææ代ç ææç»ä½
% time series:ç¥ç»ç½ç»å¨æ¶é´åºåä¸çåºç¨
% æ¬ä»£ç åºèªãç¥ç»ç½ç»ä¹å®¶ã
timeList = 0 :0.01 : 2*pi; %çææ¶é´ç¹
X = sin(timeList); %çææ¶é´åºåä¿¡å·
%å©ç¨x(t-5),x(t-4),x(t-3),x(t-2),x(t-1)ä½ä¸ºè¾å
¥é¢æµx(t)ï¼å°x(t)ä½ä¸ºè¾åºæ°æ®
inputData = [X(1:end-5);X(2:end-4);X(3:end-3);X(4:end-2);X(5:end-1)];
outputData = X(6:end);
%使ç¨ç¨è¾å
¥è¾åºæ°æ®ï¼inputDataãoutputDataï¼å»ºç«ç½ç»ï¼
%éèç¹ä¸ªæ°è®¾ä¸º3.å
¶ä¸éå±ãè¾åºå±çä¼ éå½æ°åå«ä¸ºtansigåpurelinï¼ä½¿ç¨trainlmæ¹æ³è®ç»ã
net = newff(inputData,outputData,3,{'tansig','purelin'},'trainlm');
%设置ä¸äºå¸¸ç¨åæ°
net.trainparam.goal = 0.0001; %è®ç»ç®æ ï¼åæ¹è¯¯å·®ä½äº0.0001
net.trainparam.show = 400; %æ¯è®ç»400次å±ç¤ºä¸æ¬¡ç»æ
net.trainparam.epochs = 1500; %æ大è®ç»æ¬¡æ°ï¼15000.
[net,tr] = train(net,inputData,outputData);%è°ç¨matlabç¥ç»ç½ç»å·¥å
·ç®±èªå¸¦çtrainå½æ°è®ç»ç½ç»
simout = sim(net,inputData); %è°ç¨matlabç¥ç»ç½ç»å·¥å
·ç®±èªå¸¦çsimå½æ°å¾å°ç½ç»çé¢æµå¼
figure; %æ°å»ºç»å¾çªå£çªå£
t=1:length(simout);
plot(t,outputData,t,simout,'r')%ç»å¾ï¼å¯¹æ¯åæ¥çè¾åºåç½ç»é¢æµçè¾åº
%------------------éå :æ½åæ°å¦è¡¨è¾¾å¼----------------------------top
%å¸æè±ç¦»matlabçsimå½æ°æ¥ä½¿ç¨è®ç»å¥½ç½ç»çè¯ï¼å¯ä»¥æ½ååºæ°å¦ç表达å¼ï¼|
%è¿æ ·å¨ä»»ä½è½¯ä»¶ä¸ï¼åªéè¦æ表达å¼è®¡ç®å³å¯ã |
%============æ½åæ°å¦è¡¨è¾¾å¼==================
%æ½ååºç½ç»çæå¼åéå¼
w12 = net.iw{1,1}; %第1å±ï¼è¾å
¥å±ï¼å°ç¬¬2å±ï¼éå±ï¼çæå¼
b2 = net.b{1}; %第2å±ï¼éå±ï¼çéå¼
w23 = net.lw{2,1}; %第2å±ï¼éå±ï¼å°ç¬¬3å±ï¼è¾åºå±ï¼çæå¼
b3 = net.b{2}; %第3å±ï¼è¾åºå±ï¼çéå¼
%ç±äºæå½ä¸åï¼å¿
é¡»å
å°å½ä¸åä¿¡æ¯æååºæ¥
iMax = max(inputData,[],2);
iMin = min(inputData,[],2);
oMax = max(outputData,[],2);
oMin = min(outputData,[],2);
%æ¹æ³1ï¼å½ä¸å--->计ç®è¾åº--->åå½ä¸å
normInputData=2*(inputData -repmat(iMin,1,size(inputData,2)))./repmat(iMax-iMin,1,size(inputData,2)) -1;
tmp = w23*tansig( w12 *normInputData + repmat(b2,1,size(normInputData,2))) + repmat(b3,1,size(normInputData,2));
myY = (tmp+1).*repmat(oMax-oMin,1,size(outputData,2))./2 + repmat(oMin,1,size(outputData,2));
%æ¹æ³2ï¼ç¨çæ£çæå¼åéå¼è¿è¡è®¡ç®
%å
¬å¼è¯·åèãæå对åºåå§æ°æ®çæéåéå¼ã
W12 = w12 * 2 ./repmat(iMax' -iMin',size(w12,1),1);
B2 = -w12* (2*iMin ./(iMax - iMin) + 1) + b2;
W23 = w23 .*repmat((oMax -oMin),1,size(w23,2))/2;
B3 = (oMax -oMin) .*b3 /2 + (oMax -oMin)/2 + oMin;
%æç»çæ°å¦è¡¨è¾¾å¼ï¼
myY2 = W23 *tansig( W12 *inputData + repmat(B2,1,size(inputData,2))) + repmat(B3,1,size(inputData,2));
温馨提示:答案为网友推荐,仅供参考