How can I predict new values in NARnet after it has been trained?

3 vues (au cours des 30 derniers jours)
Juan
Juan le 3 Sep 2014
Hello! I would like to ask a few simple questions.
I have a 365x24 samples that I would like to use to train a NAR network. After that I want to use it to predict new 24 values with a 1x24 input data.
inPutss = xlsread('Datos','Hoja2');
targetSeries = tonndata(inPutss,false,false);
feedbackDelays = 1:2;
hiddenLayerSize = 10;
net = narnet(feedbackDelays,hiddenLayerSize);
net.inputs{1}.processFcns = {'removeconstantrows','mapminmax'};
[inputs,inputStates,layerStates,targets] = preparets(net,{},{},targetSeries);
net.divideFcn = 'divideblock';
net.divideMode = 'time';
net.divideParam.trainRatio = 70/100;
net.divideParam.valRatio = 15/100;
net.divideParam.testRatio = 15/100;
net.trainFcn = 'trainlm';
[net,tr,YY,EE,XFF,AFF] = train(net,inputs,targets,inputStates,layerStates);
outputs = net(inputs,inputStates,layerStates);
errors = gsubtract(targets,outputs);
performance = perform(net,targets,outputs)
netc = closeloop(net);
[xc,xic,aic,tc] = preparets(netc,{},{},targetSeries);
yc = netc(xc,xic,aic);
perfc = perform(net,tc,yc)
nets = removedelay(net);
[xs,xis,ais,ts] = preparets(nets,{},{},targetSeries);
ys = nets(xs,xis,ais);
closedLoopPerformance = perform(net,tc,yc)
Okay now that I have my network trained, I want to use it to predict new values:
test = xlsread('Datos','Sheet1') %this is a 1x24 vector
test2 = tonndata(test,false,false)
sample1 = net(test2)
sample2 = netc(test2)
sample3 = nets(test3)
My first question is:
1- Which one of the three networks that the script created is the one that I should use to predict next-day values? In other words, which result is better? sample1, sample2 or sample3?
2- How can I add more layers (apart from the hidden ones) and how can I define the number of neurons inside each one of them?
Thanks to anyone that can answer my questions

Réponse acceptée

Greg Heath
Greg Heath le 10 Sep 2014
inPutss = xlsread('Datos','Hoja2');
targetSeries = tonndata(inPutss,false,false);
feedbackDelays = 1:2;
hiddenLayerSize = 10;
net = narnet(feedbackDelays,hiddenLayerSize);
% net.inputs{1}.processFcns = {'removeconstantrows','mapminmax'};
[inputs,inputStates,layerStates,targets] = preparets(net,{},{},targetSeries);
net.divideFcn = 'divideblock';
% net.divideMode = 'time';
% net.divideParam.trainRatio = 70/100;
% net.divideParam.valRatio = 15/100;
% net.divideParam.testRatio = 15/100;
% net.trainFcn = 'trainlm';
[net,tr,YY,EE,XFF,AFF] = train(net,inputs,targets,inputStates,layerStates);
% outputs = net(inputs,inputStates,layerStates);
% errors = gsubtract(targets,outputs);
% performance = perform(net,targets,outputs)
performance = perform(net,targets,YY)
'GEH1: NO PROOF THAT THE OL NET IS SUCCESSFUL' ; ' e.g., performance << var(cell2mat(transpose(targets)),1)' ;
netc = closeloop(net);
[xc,xic,aic,tc] = preparets(netc,{},{},targetSeries);
yc = netc(xc,xic,aic);
perfc = perform(net,tc,yc)
'GEH2: NO PROOF THAT THE CL NET IS SUCCESSFULL';
nets = removedelay(net);
'GEH3: ERROR: CANNOT HAVE 0 FEEDBACK DELAY';
[xs,xis,ais,ts] = preparets(nets,{},{},targetSeries);
ys = nets(xs,xis,ais);
closedLoopPerformance = perform(net,tc,yc)
'GEH4: TYPO: REPLACE net WITH nets ' ;
Okay now that I have my network trained, I want to use it to predict new values:
test = xlsread('Datos','Sheet1')
this is a 1x24 vector
test2 = tonndata(test,false,false)
sample1 = net(test2)
sample2 = netc(test2)
sample3 = nets(test3)
' GEH5: ERROR : REPLACE test3 WITH test2 ';
My first question is:
1- Which one of the three networks that the script created is the one that I should use to
predict next-day values? In other words, which result is better? sample1,sample2 or sample3?
' GEH6: NONE OF THE ABOVE. ';
' a. sample1 is openloop';
' b. sample3 cannot exist with with 0 feedback delay';
' c. sample2 has no specified Xic,Aic.';
2- How can I add more layers (apart from the hidden ones) and how can I define the number of neurons inside each one of them?
'GEH7: net = narnet( FD, [H1 H2 H3])';
Thanks to anyone that can answer my questions
Hope this helps.
Thank you for formally accepting my answer
Greg

Plus de réponses (0)

Catégories

En savoir plus sur Sequence and Numeric Feature Data Workflows dans Help Center et File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by