Kohonen (example from help does not work)

2 次查看（过去 30 天）
Alexander
Alexander 2011-9-7
Hi all, please I need your help !
example (Kohonen) from help does not work
>> p = [.1 .8 .1 .9; .2 .9 .1 .8];
>> net = newc([0 1; 0 1],2);
>> wts = net.IW{1,1}
>> biases = net.b{1};
>> net.trainParam.epochs = 500;
>> net = train(net,p);
>> a = sim(net,p);
>> ac = vec2ind(a); >> ac
ac =
1 1 1 1
>> wts
wts =
0.5000 0.5000
0.5000 0.5000
My weight did not change. in example
wts =
0.1000 0.1467
0.8474 0.8525
Maybe I'm doing something wrong?

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采纳的回答

Alexander
Alexander 2011-9-8
7.10.0 (R.2010b)
  1 个评论
Lucas García
Lucas García 2011-9-8
So, download the fix in the previous link and give it a try. Then it will work fine.

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更多回答（3 个）

Walter Roberson
Walter Roberson 2011-9-7
You did not assign a new value to wts, so it is going to continue to be the value that was retrieved before you did the training. You need to retrieve net.IW{1,1} after the training in order to see the effect of the training on the weights.
  1 个评论
Alexander
Alexander 2011-9-8
These are my values after training
net.IW{1,1}
ans =
0.5000 0.5000
0.5000 0.5000
After training, they have not changed.

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Lucas García
Lucas García 2011-9-8
Which release are you using? There is a known bug in R2010b and R2011a regarding newc and competlayer.
http://www.mathworks.com/support/bugreports/730788
It has been fixed in R2011b.
Alexander
Alexander 2011-9-8
It is strange, but FIX_R2010b_COMPETLAYERAYER.zip is corrupted.
FIX_R2011a_COMPETLAYER.zip is normal.

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