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How to calculate or extract the confidence level of each classified instance in a test case.

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I'm new to WEKA and machine learning in general.

I have a test set with about 6500 instances. I have a model that has already been trained with a training set. Once I run the test set through the saved model, is there a way I can extract the confidence level of each specific instance? By confidence level, I mean a numerical value that expresses the probability that the classifier has classified a specific instance correctly. I want this confidence number for each instance in the file. Is there a way to do that?

submitted by logrech
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