Class MedianOf3PivotingStrategy
- java.lang.Object
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- org.apache.commons.math4.legacy.stat.descriptive.rank.MedianOf3PivotingStrategy
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- All Implemented Interfaces:
PivotingStrategy
public class MedianOf3PivotingStrategy extends Object implements PivotingStrategy
Classic median of 3 strategy given begin and end indices.- Since:
- 3.4
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Constructor Summary
Constructors Constructor Description MedianOf3PivotingStrategy()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description intpivotIndex(double[] work, int begin, int end)Find pivot index of the array so that partition and Kth element selection can be made.
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Constructor Detail
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MedianOf3PivotingStrategy
public MedianOf3PivotingStrategy()
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Method Detail
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pivotIndex
public int pivotIndex(double[] work, int begin, int end)
Find pivot index of the array so that partition and Kth element selection can be made. This in specific makes use of median of 3 pivoting.- Specified by:
pivotIndexin interfacePivotingStrategy- Parameters:
work- data arraybegin- index of the first element of the sliceend- index after the last element of the slice- Returns:
- The index corresponding to a pivot chosen between the first, middle and the last indices of the array slice
- Throws:
MathIllegalArgumentException- MathIllegalArgumentException when indices exceeds range
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