List of attributeStats() Examples

Examples of attributeStats()

weka.core.Instances.attributeStats()
Calculates summary statistics on the values that appear in this set of instances for a specified attribute. @param index the index of the attribute to summarize (index starts with 0) @return an AttributeStats object with it's fields calculated.

Examples of weka.core.Instances.attributeStats()

        }
        if (m_FullMissingCounts[i] == instances.numInstances()) {
          m_FullMeansOrMediansOrModes[i] = Double.NaN; // mark missing as mean
        }
      } else {
        m_FullNominalCounts[i] = instances.attributeStats(i).nominalCounts;
        if (m_FullMissingCounts[i] 
            > m_FullNominalCounts[i][Utils.maxIndex(m_FullNominalCounts[i])]) {
          m_FullMeansOrMediansOrModes[i] = -1; // mark missing as most common value
        }
      }

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Examples of weka.core.Instances.attributeStats()

      Instances toFilter = getInputFormat();
      int[] attsToDelete = new int[toFilter.numAttributes()];
      int numToDelete = 0;
      for(int i = 0; i < toFilter.numAttributes(); i++) {
  if (i==toFilter.classIndex()) continue; // skip class
  AttributeStats stats = toFilter.attributeStats(i);
  if (stats.missingCount == toFilter.numInstances()) {
    attsToDelete[numToDelete++] = i;
  } else if (stats.distinctCount < 2) {
    // remove constant attributes
    attsToDelete[numToDelete++] = i;

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Examples of weka.core.Instances.attributeStats()

      m_attStats = new AttributeStats [input.numAttributes()];
      
      for (int i = 0; i < input.numAttributes(); i++) {
  if (input.attribute(i).isNumeric() &&
      (input.classIndex() != i)) {
    m_attStats[i] = input.attributeStats(i);
  }
      }


      // Convert pending input instances
      for(int i = 0; i < input.numInstances(); i++) {

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