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https://issues.apache.org/jira/browse/OPENNLP-1187?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeff Zemerick closed OPENNLP-1187.
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> Issue in finding accuracy of model
> ----------------------------------
>
> Key: OPENNLP-1187
> URL: https://issues.apache.org/jira/browse/OPENNLP-1187
> Project: OpenNLP
> Issue Type: Bug
> Components: Doccat, Machine Learning
> Affects Versions: 1.8.4
> Reporter: Aman Garg
> Assignee: Martin Wiesner
> Priority: Major
> Fix For: 2.1.1
>
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> the trainingStats function in NaiveBayesTrainer class is not working properly
> and display wrong result.
> In findParameters(), at line 154 i.e.
> EvalParameters evalParams = new EvalParameters(params, numOutcomes);
> should be replaced by following block:
>
> double[] outcomeTotals = new double[outcomeLabels.length];
> for (int i = 0; i < params.length; ++i) {
> Context context = params[i];
> for (int j = 0; j < context.getOutcomes().length; ++j) {
> int outcome = context.getOutcomes()[j];
> double count = context.getParameters()[j];
> outcomeTotals[outcome] += count;
> }
> }
> evalParams = new NaiveBayesEvalParameters(params,
> outcomeLabels.length, outcomeTotals, predLabels.length);
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