Weka：如何在java中获取测试实例的预测值？ [英] Weka: How do I get the prediction value in java for a test instance?

问题描述

我已成功训练了一个分类器（bayesnet）并构建了一个测试集（ARFF格式），它有一个实例，缺少一个值。

I have successfully trained a classifier (bayesnet) and constructed a test set (ARFF-format), which has one instance, with one missing value.

Evaluation eTest = new Evaluation(trainingInstance);
eTest.evaluateModel(bayes_Classifier, testInstance);

如何访问缺失值的预测？我用GUI测试了两种ARFF结构（训练和测试）。他们工作。我根本就不知道，如何访问预测值......

How can I access the prediction for the missing value? I have tested both ARFF structures (training & Test) with the GUI. They work. I simply do not know, how to access the prediction value...

推荐答案

你想用 eTest.evaluateModelOnce（）这将返回一个double值，预测单个 testInstance 。 evaluateModel（）方法适用于多个实例。

You want to use eTest.evaluateModelOnce() which would return a double value, the prediction for a single testInstance. The evaluateModel() method is intended for multiple instances.

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