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Home > Class Reference > %SYS namespace > %ZEN.Report.Aggregate.Median

%ZEN.Report.Aggregate.Median

class %ZEN.Report.Aggregate.Median extends %ZEN.Report.CustomAggregate

Aggregate for the median of a set of numerical data. The median is a number with half of the data set of greater value than it, and half of lesser value. For a data set with an odd size, the median is a member of the data set. For a data set with an even size, the median is half-way between two members of the data set.

Property Inventory (Including Private)

Method Inventory (Including Private)

Properties (Including Private)

property Count as %Integer [ InitialExpression = 0 ];
Number of values processed
Property methods: CountDisplayToLogical(), CountGet(), CountIsValid(), CountLogicalToDisplay(), CountNormalize(), CountSet(), CountXSDToLogical()
property Values as array of %Integer;
Array of processed values
Property methods: ValuesBuildValueArray(), ValuesCollectionToDisplay(), ValuesCollectionToOdbc(), ValuesDisplayToCollection(), ValuesDisplayToLogical(), ValuesGet(), ValuesGetObject(), ValuesGetObjectId(), ValuesGetSwizzled(), ValuesIsValid(), ValuesLogicalToDisplay(), ValuesNormalize(), ValuesOdbcToCollection(), ValuesSet(), ValuesSetObject(), ValuesSetObjectId(), ValuesXSDToLogical()

Methods (Including Private)

method GetResult() as %String
Returns the median. Returns "" for an empty data set. Uses a divide and conquer selection algorithm.
method ProcessValue(pValue As %Float) as %Status
Processes each new value.
private method partition(left, right, pivotIndex)
Finds the partition point
private method select(k, left, right)
Select's the kth smallest element in Values
private method swap(x, y)

Inherited Members

Inherited Properties (Including Private)

Inherited Methods (Including Private)