how can i bring mse near to 0 as it is very large on training data and how 5 steps ahead prediction is done with ntstool by using closeloop net

조회 수: 1 (최근 30일)
i trained neural network with data set now i need to do 4 steps ahead prediction, for this in targets it is better to give the real dataset or the each prediction to find 4 step ahead forecasting . what should be target value ? values from real data set or previously predicted once should be given as targets.
how to improve performance on traing data ? i tried by changing number of hidden layers , neurons and delay but its not working fine
the last thing can anyone help me regarding finding the proper lagged values as delay to be used in neural net with autocorrelation kind of things

채택된 답변

Greg Heath
Greg Heath 2015년 4월 15일
Insufficient detail.
What are the input and targets?
size(input) = ?
size(target)= ?
What are the significant lags of the target autocorrelation function and input/target cross correlation function?
  댓글 수: 2
SAM
SAM 2015년 4월 17일
hi greg,
please help me in identifying significant lag terms with both correlation and autocor, i have understood but i am unable to do it. if possible please send me an7y of ur link

댓글을 달려면 로그인하십시오.

추가 답변 (2개)

SAM
SAM 2015년 4월 15일
HI GREG , thanks alot for responding , after reading many of your posts i m trying to find out the lagged values with autocorr and cross corr, but truly it is still not cleared to me as i hv recently started .
i have temperature data series of total 2825, inputs are 4*2795 and output 1*2795 , i need to forecast 5 steps ahead, rest of 30 values are used as test data . i m using narx close loop n open loo nets.....
truely speaking i took various values of ID and FD ...1. (1:4) 2.(1:2) 3(1:8) i tried with these delay values but now i cum to know that theses should be choosen through correlation by reading your posts
meanwhile i simulated many times by changing number of hidden neurons 20, 50, [50 30], 80 and 100.
i am really thankful to you .
if u dnt mind i have one more thing to ask can i get some link for time series prediction with deep neural networks
  댓글 수: 4
cheersl cheer
cheersl cheer 2016년 4월 2일
Hi Greg Heath,Thank you for your answer. I have some questions about time series prediction,I have read that many papers use the codes of Hinton which is used to classification to do prediction,i am confused .I don't konw how can I use the code of DBN to predicte time series,can you give me any suggestions or links about time series predictions,I am doing the siol moisture prediction. Looking forward for your reply,Thank you a lot for your patience in advance
SAM
SAM 2016년 4월 28일
did you find the solution of time series prediction with DNN, are following the matlab tool box of Deep NN

댓글을 달려면 로그인하십시오.


SAM
SAM 2015년 4월 16일
dear Greg,
i am trying to go through all of your previous posts regarding narxnet and nncorr, please kindly guide me or send me any link of post. because i am not able to understand how to find significant lags autocorrelated and cross correlated btwn output/output and input/output i did
N = length(maxT)% maxT is 2895 samples of output zy=zscore(maxT,1) autocorr=nncorr(zy,zy,N-1,'unbiased') plot(autocorr)
<</matlabcentral/answers/uploaded_files/29181/untitled.jpg>>
  댓글 수: 1
Greg Heath
Greg Heath 2015년 4월 17일
편집: Greg Heath 2015년 4월 18일
You will have to choose one or two of my posts and ask specific questions. Good search terms to include (not all at once)
greg nncorr sigthresh95 or thresh95

댓글을 달려면 로그인하십시오.

카테고리

Help CenterFile Exchange에서 Sequence and Numeric Feature Data Workflows에 대해 자세히 알아보기

Community Treasure Hunt

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

Start Hunting!

Translated by