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NN accuracy on test set low
See my example at http://www.mathworks.com/matlabcentral/newsreader/view_thread/334932#919949 Hope this helps. Greg

12 years ago | 0

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Zero crossing detection in Simulink
if(a(i)*a(i+1)<0) Hope this helps. Greg

12 years ago | 0

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??? Undefined function or variable - Matlab R2011a
lookfor ampplot

12 years ago | 0

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Compute FFT consecutively in Matlab
output(aa) is a scalar output(aa,:) is a row vector Hope this helps. *Thank you for formally accepting my answer* Gr...

12 years ago | 0

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Help selecting a search algorithm, dsearchn, knnsearch, etc.
>> min([ 1 1 2 2 3 3]) ans = 1 Hope this helps. *Thank you for formally accepting my answer* Greg

12 years ago | 0

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Lag Space in NARX NN
Many code examples have been posted. Search on greg nncorr narxnet Hope this helps *Thank you for formally accepting ...

12 years ago | 0

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how to do feature extraction based on NDVI vlaues using neural networks?
help patternnet doc patternnet Search the NEWSGROUP and ANSWERS using judicious combinations of NEURAL, IMAGE, CLASSIFICAT...

12 years ago | 1

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training multilabel data with traingdm function of Neural network toolbox
For classification/pattern-recognition, newpr is favored over newff For regression/curve-fitting, newfit is favored over new...

12 years ago | 1

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Answered
NN accuracy on test set low
1. Not necessary to specify default process functions. 2. How did you know my birthdate is 4151941 ?? 3. You are reusing th...

12 years ago | 1

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artificial neoural network FFBP algorithm
Without seeing your code, or other details, the only thing I can recommend is to search for my code in the NEWSGROUP and ANSWERS...

12 years ago | 0

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Answered
looking for a function similar to mapminmax
minA = min(A(:)) maxA = max(A(:)) (B- minB)/(maxB-minB) = (A-minA)/(maxA-minA) B = minB +(maxB-minB)*(A-minA)/(maxA-...

12 years ago | 1

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Can anyone tell what does this histogram interpret ?
It shows the distribution of errors for the training, validation and test subsets.

12 years ago | 1

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Answered
How can I reuse the same neural network to recreate the same results I had while training/creating the network?
I don't think you want to save the script. You want to save the net save net Hope this helps. Greg

12 years ago | 1

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neural network with bp algorithm
I have posted several examples. Search NEWSGROUP and ANSWERS using greg narxnet greg narnet greg timedelaynet Hope th...

12 years ago | 0

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Why do we need to compute power spectral density for eeg signal?
The obvious answer is that the presence of epilepsy is indicated by peaks in the PSD in certain frequency intervals.

12 years ago | 1

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Why am i getting zero neurons in output layer of pattern net?
>thank u so much for being so helpful. but it is not working. in fact my input matrix (x) is 2321748x1 single and training matri...

12 years ago | 1

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How is the coefficient 'R' calculated in regression plots in neural network toolbox?
t = target y = output Cyt = corrcoef(y,t) R = Cyt(2,1)

12 years ago | 2

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Neural Network applied to compute square root
0. NOTATION: (input,hidden,target,output) = (x,h,t,y) 1. Probably need more than N = 10 data points 2. t(3) = 200 is an ...

12 years ago | 0

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how can i use an image as a input to the artificial neural network? pls help me soon..,
Extract I features from each of N images. The size of the input and target matrices should be [ I N ] = size(input) [ O N ...

12 years ago | 1

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Answered
Why am i getting zero neurons in output layer of pattern net?
Unlike the obsolete functions newfit, newpr, newff, etc, that are created from x and t, the current functions fitnet, patternet,...

12 years ago | 1

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Answered
How to use Automatic Relevance Determination (ARD) to determine the window-size in time series forecasting
I am not familiar with ARD. I just use the significant lags in the input/target cross-correlation function and the target autoco...

12 years ago | 2

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Neural Network cross validation
Formatting not perfect; Did you cut and paste this version? Results? size(inputs) = ? size(targets) = ? Did you try ...

12 years ago | 1

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NN accuracy on test set low
Insufficient info: How many characters? How many examples for each character? What are the dimensions of the input and ...

12 years ago | 2

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I need a Neural Network determining service availabilites through host availabilities using and emitting binary data (only 0 or 1)
The pattern fitting tool is the one to use. However, if you train with purelin or, better yet, logsig , you can always re...

12 years ago | 1

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Continuous outputs on Neural Networks
You have to have the same number of I dimensional "i"nput vectors and O dimensional "o"utput target vectors { I N ] = size(x...

12 years ago | 1

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why we extract feature of eeg signal for network neural? (energy, energy power density, convariance, entropy)?
Feature extraction allows models to concentrate on the characteristics of the input data that are the most correlated with the d...

12 years ago | 2

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Answered
I am not able to use a trained neural network ?
[ I N ] = size(x) % [ 2 31 ] [O N ]= size(t)% [ 1 31] 1. For precision computing transform to zero mean and unit bia...

12 years ago | 0

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fixunknows on nftool GUI matlab
I don't know for sure. However, I see no reason why you should not assume that functions called from command line and GUI use ...

12 years ago | 2

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Answered
When using pattern recognition tool in neural network start,I am unable to load target value data.I tried using column vector.
If this is pattern recognition with N I-dimensional input vectors from c classes, the columns of the target matrix should be u...

12 years ago | 2

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Answered
looking for a function similar to mapminmax
1. Convert targets to closed interval [0, 1] 2. Use LOGSIG for the output transfer function *Thank you for formally acce...

12 years ago | 1

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