weka.core.Instances.delete()方法的使用及代码示例

x33g5p2x  于2022-01-21 转载在 其他  
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本文整理了Java中weka.core.Instances.delete()方法的一些代码示例，展示了Instances.delete()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Instances.delete()方法的具体详情如下：
包路径：weka.core.Instances
类名称：Instances
方法名：delete

Instances.delete介绍

[英]Removes all instances from the set.
[中]从集合中删除所有实例。

代码示例

代码示例来源：origin: com.googlecode.obvious/obviousx-weka

@Override
public void removeAllRows() {
 instances.delete();
}

代码示例来源：origin: stackoverflow.com

Instances data;
...

// it's important to iterate from last to first, because when we remove
// an instance, the rest shifts by one position.
for (int i = data.numInstances - 1; i >= 0; i--) {
  Instance inst = data.getInstance(i);
  if (condition(inst)) {
    data.delete(i);
  }
}

代码示例来源：origin: com.googlecode.obvious/obviousx-weka

@Override
public void delete() {
 table.removeAllRows();
 super.delete();
}

代码示例来源：origin: com.googlecode.obvious/obviousx-weka

@Override
public void delete(int index) {
 table.removeRow(index);
 super.delete(index);
}

代码示例来源：origin: com.googlecode.obvious/obviousx-weka

@Override
public boolean removeRow(int row) {
 if (instances.instance(row) == null) {
  return false;
 }
 instances.delete(row);
 return true;
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Deletes all training instances from our dataset.
 */
public void removeAllInstances() {
 if (m_trainingData != null) {
  m_trainingData.delete();
  try {
   initialize();
  } catch (Exception e) {
  }
  ;
 }
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * Deletes all training instances from our dataset.
 */
public void removeAllInstances() {
 if (m_trainingData != null) {
  m_trainingData.delete();
  try {
   initialize();
  } catch (Exception e) {
  }
  ;
 }
}

代码示例来源：origin: net.sf.meka.thirdparty/mulan

/**
 * Deletes the unnecessary instances, the instances that have value 0 on
 * given attribute.
 *
 * @param trainSet the trainSet on which the deletion will be applied
 * @param attrIndex the index of the attribute that the deletion is based
 */
protected void deleteInstances(Instances trainSet, int attrIndex) {
  for (int i = 0; i < trainSet.numInstances(); i++) {
    if (trainSet.instance(i).stringValue(attrIndex).equals("0")) {
      trainSet.delete(i);
      // While deleting an instance from the trainSet, i must reduced too
      i--;
    }
  }
}
//spark temporary edit

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * deletes the instance at the given index
 * 
 * @param rowIndex the index of the row
 * @param notify whether to notify the listeners
 */
public void deleteInstanceAt(int rowIndex, boolean notify) {
 if ((rowIndex >= 0) && (rowIndex < getRowCount())) {
  if (!m_IgnoreChanges) {
   addUndoPoint();
  }
  m_Data.delete(rowIndex);
  if (notify) {
   notifyListener(new TableModelEvent(this, rowIndex, rowIndex,
    TableModelEvent.ALL_COLUMNS, TableModelEvent.DELETE));
  }
 }
}

代码示例来源：origin: Waikato/meka

/**
 * deletes the instance at the given index
 *
 * @param rowIndex the index of the row
 * @param notify whether to notify the listeners
 */
public void deleteInstanceAt(int rowIndex, boolean notify) {
  if ((rowIndex >= 0) && (rowIndex < getRowCount())) {
    if (!m_IgnoreChanges) {
      addUndoPoint();
    }
    m_Data.delete(rowIndex);
    if (notify) {
      notifyListener(new TableModelEvent(this, rowIndex, rowIndex,
        TableModelEvent.ALL_COLUMNS, TableModelEvent.DELETE));
    }
  }
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * deletes the instance at the given index
 * 
 * @param rowIndex the index of the row
 * @param notify whether to notify the listeners
 */
public void deleteInstanceAt(int rowIndex, boolean notify) {
 if ((rowIndex >= 0) && (rowIndex < getRowCount())) {
  if (!m_IgnoreChanges) {
   addUndoPoint();
  }
  m_Data.delete(rowIndex);
  if (notify) {
   notifyListener(new TableModelEvent(this, rowIndex, rowIndex,
    TableModelEvent.ALL_COLUMNS, TableModelEvent.DELETE));
  }
 }
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * Resets the class values of all instances using voting. For each instance
 * the class value that satisfies the most rules is choosen as new class
 * value.
 * 
 * @param dataset the dataset to work on
 * @return the changed instances
 * @throws Exception if something goes wrong
 */
private Instances voteDataset(Instances dataset) throws Exception {
 for (int i = 0; i < dataset.numInstances(); i++) {
  Instance inst = dataset.firstInstance();
  inst = votedReclassifyExample(inst);
  dataset.add(inst);
  dataset.delete(0);
 }
 return dataset;
}

代码示例来源：origin: net.sf.meka.thirdparty/mulan

@Override
public void buildInternal(MultiLabelInstances mlData) throws Exception {
  //Do the transformation
  //and generate the classifier
  pt6Trans = new IncludeLabelsTransformation();
  debug("Transforming the dataset");
  transformed = pt6Trans.transformInstances(mlData);
  debug("Building the base-level classifier");
  baseClassifier.buildClassifier(transformed);
  transformed.delete();
}

代码示例来源：origin: net.sf.meka/meka

/**
 * deletes the instance at the given index
 *
 * @param rowIndex the index of the row
 * @param notify whether to notify the listeners
 */
public void deleteInstanceAt(int rowIndex, boolean notify) {
  if ((rowIndex >= 0) && (rowIndex < getRowCount())) {
    if (!m_IgnoreChanges) {
      addUndoPoint();
    }
    m_Data.delete(rowIndex);
    if (notify) {
      notifyListener(new TableModelEvent(this, rowIndex, rowIndex,
        TableModelEvent.ALL_COLUMNS, TableModelEvent.DELETE));
    }
  }
}

代码示例来源：origin: Waikato/meka

@Override
public Instance transformInstance(Instance x) throws Exception{
Instances tmpInst = new Instances(x.dataset());
tmpInst.delete();
tmpInst.add(x);

Instances features = this.extractPart(tmpInst, false);
Instances pseudoLabels = new Instances(this.compressedMatrix);
Instance tmpin = pseudoLabels.instance(0);
pseudoLabels.delete();
pseudoLabels.add(tmpin);
for ( int i = 0; i< pseudoLabels.classIndex(); i++) {
  pseudoLabels.instance(0).setMissing(i);
}
Instances newDataSet = Instances.mergeInstances(pseudoLabels, features);
newDataSet.setClassIndex(this.size);

return newDataSet.instance(0);
}

代码示例来源：origin: net.sf.meka/meka

@Override
public Instance transformInstance(Instance x) throws Exception{
Instances tmpInst = new Instances(x.dataset());
tmpInst.delete();
tmpInst.add(x);

Instances features = this.extractPart(tmpInst, false);
Instances pseudoLabels = new Instances(this.compressedMatrix);
Instance tmpin = pseudoLabels.instance(0);
pseudoLabels.delete();
pseudoLabels.add(tmpin);
for ( int i = 0; i< pseudoLabels.classIndex(); i++) {
  pseudoLabels.instance(0).setMissing(i);
}
Instances newDataSet = Instances.mergeInstances(pseudoLabels, features);
newDataSet.setClassIndex(this.size);

return newDataSet.instance(0);
}

代码示例来源：origin: nz.ac.waikato.cms.weka/weka-stable

/**
 * This will remove all buffered instances from the inputformat dataset. Use
 * this method rather than getInputFormat().delete();
 */
protected void flushInput() {
 if ((m_InputStringAtts.getAttributeIndices().length > 0)
  || (m_InputRelAtts.getAttributeIndices().length > 0)) {
  m_InputFormat = m_InputFormat.stringFreeStructure();
  m_InputStringAtts =
   new StringLocator(m_InputFormat, m_InputStringAtts.getAllowedIndices());
  m_InputRelAtts = new RelationalLocator(m_InputFormat,
   m_InputRelAtts.getAllowedIndices());
 } else {
  // This more efficient than new Instances(m_InputFormat, 0);
  m_InputFormat.delete();
 }
}

代码示例来源：origin: net.sf.meka/meka

@Override
public Instance transformInstance(Instance x) throws Exception{

Instances tmpInst = new Instances(x.dataset());
tmpInst.delete();
tmpInst.add(x);

Instances features = this.extractPart(tmpInst, false);
Instances pseudoLabels = new Instances(this.compressedTemplateInst);
Instance tmpin = pseudoLabels.instance(0);
pseudoLabels.delete();

pseudoLabels.add(tmpin);
for ( int i = 0; i< pseudoLabels.classIndex(); i++) {
  pseudoLabels.instance(0).setMissing(i);
}
Instances newDataSet = Instances.mergeInstances(pseudoLabels, features);
newDataSet.setClassIndex(pseudoLabels.numAttributes());

return newDataSet.instance(0);
}

代码示例来源：origin: Waikato/meka

@Override
public Instance transformInstance(Instance x) throws Exception{

Instances tmpInst = new Instances(x.dataset());
tmpInst.delete();
tmpInst.add(x);

Instances features = this.extractPart(tmpInst, false);
Instances pseudoLabels = new Instances(this.compressedTemplateInst);
Instance tmpin = pseudoLabels.instance(0);
pseudoLabels.delete();

pseudoLabels.add(tmpin);
for ( int i = 0; i< pseudoLabels.classIndex(); i++) {
  pseudoLabels.instance(0).setMissing(i);
}
Instances newDataSet = Instances.mergeInstances(pseudoLabels, features);
newDataSet.setClassIndex(pseudoLabels.numAttributes());

return newDataSet.instance(0);
}

代码示例来源：origin: Waikato/weka-trunk

/**
 * This will remove all buffered instances from the inputformat dataset. Use
 * this method rather than getInputFormat().delete();
 */
protected void flushInput() {
 if ((m_InputStringAtts.getAttributeIndices().length > 0)
  || (m_InputRelAtts.getAttributeIndices().length > 0)) {
  m_InputFormat = m_InputFormat.stringFreeStructure();
  m_InputStringAtts =
   new StringLocator(m_InputFormat, m_InputStringAtts.getAllowedIndices());
  m_InputRelAtts = new RelationalLocator(m_InputFormat,
   m_InputRelAtts.getAllowedIndices());
 } else {
  // This more efficient than new Instances(m_InputFormat, 0);
  m_InputFormat.delete();
 }
}

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