
Hello all,
I am trying to use the neuralnet function from the neural package to train neural networks.  I am finishing my thesis over statistical learning in which I am comparring the MSE values for various algorithms with random data sets, so I do not have a specific application.  I have two issues that I am looking for help with.
 
1.  When I train a network with a real data set, I ALWAYS get the mean value as all of the predictions!  I get beautiful results when I use a generated data set, but only the mean for real data.  Is there any explanation of this?
 
2.  For some data sets I get this error:
"Error in neurons[[length.weights]] :   attempt to select less than one element" 
I can not find anything about what this means.
 
I would be grateful for any help over either or both of these issues.
 
Thanks,
Donna
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