preparets error for using in narxnet

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ZaidiN
ZaidiN on 12 Jul 2018
Edited: ZaidiN on 14 Jul 2018
Following error is encountered with preparets: [x,xi,ai,t]=preparets(net,inputs,{},targets); .... Error using preparets (line 105) Feedback and inputs have different numbers of timesteps.
My Code reads Inputs from a xlsx file and targets with another xlsx file.
filepath='Inputdata.xlsx'; X=xlsread(filepath); % reading the Input file with size 8461*53
filepath='Targetdata.xlsx'; Y=xlsread(filepath); % Reading the Target Input file size 1*53
inputs=num2cell(X,1); targets=num2cell(Y,1);
trainFcn='trainlm'; inputDelays=1:2; feedbackDelays=1:2; hiddenLayerSize=5;
net=narxnet(inputDelays,feedbackDelays,hiddenLayerSize,'open',trainFcn);
[x,xi,ai,t]=preparets(net,inputs,{},targets);
  1 Comment
ZaidiN
ZaidiN on 14 Jul 2018
I have solved the problem using reshape and con2seq: That makes the input and target of same size!
u=X(200:500,:); y=T(200:500,:);
r1=length (u); c1=size(u,2); % Taking size of Input vector r2=length (y); c2=size(y,2); % Taking size of Target vector
u=reshape(u,c1,r1); %Making cell array of Input Matrix %u=num2cell(X,1); u=con2seq(u);
y=reshape(y,c2,r2); %Making cell array of Target matrix %y=num2cell(T,1); y=con2seq(y);

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Answers (1)

Greg Heath
Greg Heath on 14 Jul 2018
Come on ...
Error using preparets (line 105) Feedback and inputs have different numbers of timesteps
So why don't you EXPLICITLY calculate the sizes ???????????????????
inputsize = size(inputs)
targetsize = size(targets)
Thank you for EXPLICITLY accepting my answer!
Greg
  1 Comment
ZaidiN
ZaidiN on 14 Jul 2018
Edited: ZaidiN on 14 Jul 2018
Is it right to convert input of size (8461*53) to sequential vectors for narxnet training

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