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It is a prog about linear vector quantisation neural network. while updating weight when negative value comes as a result it is showing an error.we can make those negative values to zero and can proceed iteratrations. iam umable to do it.plz help me.
The topic should be LEARNING (NOT linear) VECTOR QUANTIZATION Why is st 5 dimensional? alpha = 0.6 is too high for an ini...

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how to create my ownfitnet neural network? i have written code to calculate square root of number, plz help me to find the problem with it.
Replace net.plotFcns = {'plotperform','plottrainstate','ploterrhist', ... 'plotregression', 'plotfit'}; with either ...

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Can I use divideind after using a dividerand in Neural Networks?
If you did this in order to know which examples are in each division subset, it is not necessary because if you use the syntax [...

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neural net performance function 'msereg' disabled in 2013B
It was probably discontinued because mse now has a regularization option. help mse HTH *Thank you for formally accepti...

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How to train the neural network?
You are way off base. 1. Time series functions are timedelaynet, narnet and narxnet. 2. Read the time series documentation...

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bias and variance of trained neural network
[x,t] = simplefit_dataset; net = fitnet(4); rng(0) [ net tr y e ] = train(net,x,t); biaserr = mean(e(:)) varerr = va...

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weekly rainfall forecasting using ann tool
Begin by searching previous posts in the NEWSGROUP and ANSWERS. Depending on exactly what you want, use one of the three time-se...

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How can I design my own fitting neural network?
Always start with the default configuration. help fitnet Combine with the script obtained via the nntool GUI. You als...

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How to use ftinet to create neural network
This is a poor example: N = 10 is not large enough to obtain robust practical solutions. With [I N ] =size(x) = [ 3 10 ], [O N...

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Artificial Neural Network Prediction Code in Matlab, please help !!!
1. Plot a. Rainfall vs time b. Water Level vs time c. Water Level vs Rainfall d. Autocorrelation function...

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I don't Know why my neural network doesn't give good results
This is a classic case of overtraining an overfit net: DIVIDETRAIN: Nw = (5+1)*58+(58+1)*1 = 348 + 59 = 407 % Unknown wei...

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back propagation neural network
Search on one or more of the following greg fitnet Ntrials greg patternnet Ntrials greg feedforwardnet Ntrials

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I have aproblem in newelm
Your values of wb(k) are in the wrong order. Try IW = cell2mat(net.IW) b = cell2mat(net.b) LW = cell2mat(net.LW) HTH ...

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Prediction ability of a neural network
1. Probably (I've forgotten the definition of a finite state machine, but the NN is a universal approximator) 2. The net is n...

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what is the difference between feed forward and feed back methodology? Does the number of epochs in the neural network concept is the same defining the concept of back propagation methodology?
Feed-forward nets are used when there are no physical or mathematical constraints on the order of data presentation. In particul...

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How to create a custom Neural Network?
See the NN Toolbox documentation. If you have specific questions, please submit code, comments and error messages. Hope ...

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How to train labels for image blocks using neural network?
Form 2 matrices input columns are columnized matrices (which may be the result of using feature extraction on the original ma...

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How can I use individual matrices for training, cross validation and testing of my neural network?
I can't think of an alternate way. What is wrong with putting them all in one matrix?

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How can I input two images into neural network?
Features should be extracted from each image. The features should be assembled into a vector. The type of net should be static...

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After saving results of a Network of 300x2 input matrix and 300x7 target matrix. How can one gets the seven values column giving two inputs value?
ynew = net(xnew); Hope this helps. *Thank you for formally accepting my answer* Greg

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Frage

Is there a bug?
Most of the time I have to wait 10 seconds or more before I can type into a comment or answer box. Am I alone?

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nntoolbox change transfer function parameters
I looked at the GUI and did not see any way to change the creation function, transfer functions or training function. Sorry, ...

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bootstraping for neural network
Training errors are biased because the same data is used for creation and evaluation. Attempts to mitigate the bias involve r...

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How can I add one more hidden layer to ANN wizard?
A second hidden layer will not improve performance if your single hidden layer model is optimized. size(input) = ? size(targ...

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implementation help of Gaussian RBM in matlab
doc zscore help zscore doc mapstd help mapstd Hope this helps. * Thank you for formally accepting my answer* ...

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Neural Networks Time Series toolbox: confidence interval for predictions?
There is no automatic estimation of confidence intervals. However, when the hidden layer transfer functions are sigmoidal, o...

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is there a toolbox where...
help narxnet help narnet help timedelaynet

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I how to divide target data for feed forward network.
I don't believe a 20K dataset is needed to train/val/test the net. I recommend designing with smaller multiple sets of data and ...

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rainfall forecasting using neural network
Input forecasting: help timedelaynet Feedback forecasting: help narnet Input and Feedback forecasti...

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How to calculate the accuracy in neural network?
That works. However it is generally more useful to obtain the training, validation and testing error of each class. If you s...

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