How to create Neural Network classifier for pattern Recognition ?

Question

Biomedical 2013-9-30

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https://ww2.mathworks.cn/matlabcentral/answers/88697-how-to-create-neural-network-classifier-for-pattern-recognition

评论： moahaimen talib 2017-5-6

采纳的回答： Greg Heath

I want to create a Neural network with 50 thousand nodes for EEG recognition . Can anybody help me to do this?

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Answer 1

Greg Heath 2013-10-2

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https://ww2.mathworks.cn/matlabcentral/answers/88697-how-to-create-neural-network-classifier-for-pattern-recognition#answer_98462

在 MATLAB Online 中打开

How many classes/categories? c = ?

What is the dimensionality of your input vectors? I= ?

How many input/target examples do you have? N = ?

Choose the output target vectors to be O = c dimensional unit column vectors with a 1 in the row corresponding to the class index.

 [ I N ] = size(input)  % = ?
 [ O N ] = size(target) % = ?

Using defaults,

 Ntrn   = N - 2*round(0.15*N) % No. of training examples
 Ntrneq = Ntrn*O              % No. of training equations
 H      = 10                  % No. of hidden layer nodes
 Nw     = (I+1)*H+(H+1)*O     % No of unknown weights

Is Ntrneq > Nw ?

Is Ntrneq >> Nw ?

Use the help and doc commands and try one or more of the following practice examples

   simpleclass_dataset   - Simple pattern recognition dataset.
   cancer_dataset        - Breast cancer dataset.
   crab_dataset          - Crab gender dataset.
   glass_dataset         - Glass chemical dataset.
   iris_dataset          - Iris flower dataset.
   ovarian_dataset       - Ovarian cancer dataset.
   thyroid_dataset       - Thyroid function dataset.
   wine_dataset          - Italian wines dataset.

Search for more info and examples in the NEWSGROUP and ANSWERS using

greg patternnet

Hope this helps.

Thank you for formally accepting my answer

Greg

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moahaimen talib 2017-5-6

dear sir i need your help i need some explaining of using nn for character recognition i have 20 images to read and i must recognize 20 character of them could please help me

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