C# 如何使用weka中保存的模型将类分配给实例
在我决定发布这个问题之前,我已经阅读了很多帖子,但仍然无法得到一个明确的答案。这就是: 使用weka,我用我的训练数据训练了一个朴素的Bayestree,如下所示:C# 如何使用weka中保存的模型将类分配给实例,c#,java,data-mining,classification,weka,C#,Java,Data Mining,Classification,Weka,在我决定发布这个问题之前,我已经阅读了很多帖子,但仍然无法得到一个明确的答案。这就是: 使用weka,我用我的训练数据训练了一个朴素的Bayestree,如下所示: (the values are simplified, and there's 20000 rows in the training set) AF3,F7,F3,FC5,T7,T8,FC6,F4,F8,AF4,Action -1,2,0,1,0,0,-1,-0,-0,-0,NEUTRAL -2,1,0,2,-0,0,-0,0,-1
(the values are simplified, and there's 20000 rows in the training set)
AF3,F7,F3,FC5,T7,T8,FC6,F4,F8,AF4,Action
-1,2,0,1,0,0,-1,-0,-0,-0,NEUTRAL
-2,1,0,2,-0,0,-0,0,-1,-0,RIGHT
-1,1,0,2,-0,0,-1,0,-1,-0,LEFT
现在我想在程序中使用保存的模型来确定给定128行测试数据中的类分布。对于这128行,我没有指定类(操作属性)。基本上,我希望模型能够回答这个问题:)
因此,测试行如下所示:
-1,1,0,2,-0,0,-1,0,-1,-0,?
到目前为止,我已经提出了以下代码:
Classifier nbTree = (Classifier)SerializationHelper.read(Model) as NBTree;
Instances testInstances = TestSet();
testInstances.setClassIndex(10);
for (int i = 0; i < testInstances.numInstances(); i++)
{
Instance instance = testInstances.instance(i);
double assignedClass = nbTree.classifyInstance(instance);
double[] distributionForInstance = nbTree.distributionForInstance(instance);
}
我已经绕圈子走了两天了,非常感谢您的帮助:)我做了更多的研究,发现了这篇文章:这篇文章帮助我编写了以下代码:
Classifier nbTree = (Classifier)SerializationHelper.read(Model) as NBTree;
Instances testDataSet = new Instances(new BufferedReader(new FileReader(arff)));
testDataSet.setClassIndex(10);
Evaluation evaluation = new Evaluation(testDataSet);
for (int i = 0; i < testDataSet.numInstances(); i++)
{
Instance instance = testDataSet.instance(i);
evaluation.evaluateModelOnceAndRecordPrediction(nbTree, instance);
}
foreach (object o in evaluation.predictions().toArray())
{
NominalPrediction prediction = o as NominalPrediction;
if (prediction != null)
{
double[] distribution = prediction.distribution();
double predicted = prediction.predicted();
}
}
分类器nbTree=(分类器)SerializationHelper.read(Model)as nbTree;
Instances testDataSet=新实例(新BufferedReader(新文件读取器(arff));
testDataSet.setClassIndex(10);
评估=新评估(testDataSet);
对于(int i=0;i
这段代码允许我检查在给定实例上预测的类,以及所考虑的所有类的概率值。
我希望这会对某人有所帮助:)
Classifier nbTree = (Classifier)SerializationHelper.read(Model) as NBTree;
Instances testDataSet = new Instances(new BufferedReader(new FileReader(arff)));
testDataSet.setClassIndex(10);
Evaluation evaluation = new Evaluation(testDataSet);
for (int i = 0; i < testDataSet.numInstances(); i++)
{
Instance instance = testDataSet.instance(i);
evaluation.evaluateModelOnceAndRecordPrediction(nbTree, instance);
}
foreach (object o in evaluation.predictions().toArray())
{
NominalPrediction prediction = o as NominalPrediction;
if (prediction != null)
{
double[] distribution = prediction.distribution();
double predicted = prediction.predicted();
}
}