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类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);
}