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Building model before cross-validation #2

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aolney opened this issue Mar 2, 2014 · 0 comments
Open

Building model before cross-validation #2

aolney opened this issue Mar 2, 2014 · 0 comments

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@aolney
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aolney commented Mar 2, 2014

Right now this seems to happen in BaseClassifier.cs

public PmlEvaluation EvaluateWithCrossValidation(int numfolds = 10, bool quiet = false, bool getPredictions = true)
{
Build(quiet);
return new ClassifierEvaluator(Runtime, (IBaseClassifier)this).
EvaluateWithCrossValidateion(numfolds, quiet, getPredictions);
}

However, the WEKA maintainers say that building the model before crossvalidation can lead to incorrect results:

http://weka.8497.n7.nabble.com/Model-serialization-and-prediction-td6574.html
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@aolney