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Java InstanceList.getTargetAlphabet方法代码示例

本文整理汇总了Java中cc.mallet.types.InstanceList.getTargetAlphabet方法的典型用法代码示例。如果您正苦于以下问题:Java InstanceList.getTargetAlphabet方法的具体用法?Java InstanceList.getTargetAlphabet怎么用?Java InstanceList.getTargetAlphabet使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在cc.mallet.types.InstanceList的用法示例。


在下文中一共展示了InstanceList.getTargetAlphabet方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。

示例1: DMROptimizable

import cc.mallet.types.InstanceList; //导入方法依赖的package包/类
public DMROptimizable (InstanceList instances, MaxEnt initialClassifier) {

		this.trainingList = instances;
		Alphabet alphabet = instances.getDataAlphabet();
		Alphabet labelAlphabet = instances.getTargetAlphabet();

		this.numLabels = labelAlphabet.size();

		// Add one feature for the "default feature".
		this.numFeatures = alphabet.size() + 1; // add a spot for the intercept term
            
		//System.out.println("num features: " + numFeatures + " numLabels: " + numLabels);

		this.defaultFeatureIndex = numFeatures - 1;

		this.parameters = new double [numLabels * numFeatures];

		//this.constraints = new double [numLabels * numFeatures];
		this.cachedGradient = new double [numLabels * numFeatures];

		if (initialClassifier != null) {
			this.classifier = initialClassifier;
			this.parameters = classifier.getParameters();
			this.defaultFeatureIndex = classifier.getDefaultFeatureIndex();
			assert (initialClassifier.getInstancePipe() == instances.getPipe());
		}
		else if (this.classifier == null) {
			this.classifier =
				new MaxEnt (instances.getPipe(), parameters);
		}

		formatter = new DecimalFormat("0.###E0");

		cachedValueStale = true;
		cachedGradientStale = true;

		// Initialize the constraints

		logger.fine("Number of instances in training list = " + trainingList.size());

		for (Instance instance : trainingList) {
			FeatureVector multinomialValues = (FeatureVector) instance.getTarget();

			if (multinomialValues == null)
				continue;

			FeatureVector features = (FeatureVector) instance.getData();
			assert (features.getAlphabet() == alphabet);

			boolean hasNaN = false;

			for (int i = 0; i < features.numLocations(); i++) {
				if (Double.isNaN(features.valueAtLocation(i))) {
					logger.info("NaN for feature " + alphabet.lookupObject(features.indexAtLocation(i)).toString()); 
					hasNaN = true;
				}
			}

			if (hasNaN) {
				logger.info("NaN in instance: " + instance.getName());
			}

		}

		//TestMaximizable.testValueAndGradientCurrentParameters (this);
	}
 
开发者ID:kostagiolasn,项目名称:NucleosomePatternClassifier,代码行数:67,代码来源:DMROptimizable.java


注:本文中的cc.mallet.types.InstanceList.getTargetAlphabet方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。