Package org.pentaho.di.trans.steps.univariatestats

Class FieldIndex

java.lang.Object
org.pentaho.di.trans.steps.univariatestats.FieldIndex
public class FieldIndex extends Object
Class used to hold operating field index, intermediate data and final results for a stats calculation. Has functions to compute the mean, standard deviation and arbitrary percentiles. Percentiles can be computed using interpolation or a simple method. See The Engineering Statistics Handbook for details.

  • Field Details

    • m_columnIndex

      public int m_columnIndex

    • m_count

      public double m_count

    • m_mean

      public double m_mean

    • m_stdDev

      public double m_stdDev

    • m_max

      public double m_max

    • m_min

      public double m_min

    • m_median

      public double m_median

    • m_arbitraryPercentile

      public double m_arbitraryPercentile

    • m_sum

      public double m_sum

    • m_sumSq

      public double m_sumSq

  • Constructor Details

    • FieldIndex

      public FieldIndex()

  • Method Details

    • calculateDerived

      public void calculateDerived()

    • generateOutputValues

      public Object[] generateOutputValues(UnivariateStatsMetaFunction usmf, ArrayList<Number> cache)
      Constructs an array of Objects containing the requested statistics for one univariate stats meta function using this FieldIndex.
      Parameters:
      usmf - theUnivariateStatsMetaFunction to compute stats for. This contains the input field selected by the user along with which stats to compute for it.
      Returns:
      an array of computed statistics