casacore::TableExprGroupVariancesArrayDouble Class Reference

Aggregate class determining the variance of array values in a group. More...

#include <ExprGroupAggrFuncArray.h>

Public Member Functions
	TableExprGroupVariancesArrayDouble (TableExprNodeRep *node, uInt ddof)
virtual	~TableExprGroupVariancesArrayDouble ()
virtual void	apply (const TableExprId &id)
	Get the operand's value for the given row and apply it to the aggregation. More...
virtual void	finish ()
	If needed, finish the aggregation. More...
Public Member Functions inherited from casacore::TableExprGroupFuncArrayDouble
	TableExprGroupFuncArrayDouble (TableExprNodeRep *node)
virtual	~TableExprGroupFuncArrayDouble ()
virtual MArray< Double >	getArrayDouble (const vector< TableExprId > &)
Public Member Functions inherited from casacore::TableExprGroupFuncBase
	TableExprGroupFuncBase (TableExprNodeRep *node)
	Construct from the TaQL aggregation node. More...
virtual	~TableExprGroupFuncBase ()
virtual Bool	isLazy () const
	Does the aggregate function use lazy semantics? The default implementation returns False. More...
uInt	seqnr () const
	Get the function's sequence nr. More...
void	setSeqnr (uInt seqnr)
	Set the function's sequence nr. More...
virtual CountedPtr< vector< TableExprId > >	getIds () const
	Get the assembled TableExprIds of a group. More...
virtual Bool	getBool (const vector< TableExprId > &=vector< TableExprId >())
	Get the aggregated value. More...
virtual Int64	getInt (const vector< TableExprId > &=vector< TableExprId >())
virtual Double	getDouble (const vector< TableExprId > &=vector< TableExprId >())
virtual DComplex	getDComplex (const vector< TableExprId > &=vector< TableExprId >())
virtual MVTime	getDate (const vector< TableExprId > &=vector< TableExprId >())
virtual String	getString (const vector< TableExprId > &=vector< TableExprId >())
virtual MArray< Bool >	getArrayBool (const vector< TableExprId > &=vector< TableExprId >())
virtual MArray< Int64 >	getArrayInt (const vector< TableExprId > &=vector< TableExprId >())
virtual MArray< DComplex >	getArrayDComplex (const vector< TableExprId > &=vector< TableExprId >())
virtual MArray< MVTime >	getArrayDate (const vector< TableExprId > &=vector< TableExprId >())
virtual MArray< String >	getArrayString (const vector< TableExprId > &=vector< TableExprId >())

Protected Attributes
uInt	itsDdof
Array< Int64 >	itsNr
Array< Double >	itsCurMean
Protected Attributes inherited from casacore::TableExprGroupFuncArrayDouble
MArray< Double >	itsValue
Protected Attributes inherited from casacore::TableExprGroupFuncBase
TableExprNodeRep *	itsNode
TableExprNodeRep *	itsOperand
uInt	itsSeqnr

Additional Inherited Members
Protected Member Functions inherited from casacore::TableExprGroupFuncArrayDouble
Bool	checkShape (const MArrayBase &arr, const String &func)
	If not empty, check if the shape matches that of itsValue. More...

Detailed Description

Aggregate class determining the variance of array values in a group.

Intended use:

Internal

Review Status

Test programs:

tExprGroup

Synopsis

Aggregate class determining the variance of array values in a group. It uses a running algorithm (see en.wikipedia.org/wiki/Algorithms_for_calculating_variance)

Definition at line 791 of file ExprGroupAggrFuncArray.h.

Constructor & Destructor Documentation

TableExprGroupVariancesArrayDouble()

casacore::TableExprGroupVariancesArrayDouble::TableExprGroupVariancesArrayDouble	(	TableExprNodeRep *	node,
		uInt	ddof
	)

~TableExprGroupVariancesArrayDouble()

virtual casacore::TableExprGroupVariancesArrayDouble::~TableExprGroupVariancesArrayDouble ( )

virtual

Member Function Documentation

apply()

virtual void casacore::TableExprGroupVariancesArrayDouble::apply ( const TableExprId &  id )

virtual

Get the operand's value for the given row and apply it to the aggregation.

This function should not be called for lazy classes.

Implements casacore::TableExprGroupFuncBase.

finish()

virtual void casacore::TableExprGroupVariancesArrayDouble::finish ( )

virtual

If needed, finish the aggregation.

By default nothing is done.

Reimplemented from casacore::TableExprGroupFuncBase.

Reimplemented in casacore::TableExprGroupStdDevsArrayDouble.

Member Data Documentation

itsCurMean

Array<Double> casacore::TableExprGroupVariancesArrayDouble::itsCurMean

protected

Definition at line 801 of file ExprGroupAggrFuncArray.h.

itsDdof

uInt casacore::TableExprGroupVariancesArrayDouble::itsDdof

protected

Definition at line 799 of file ExprGroupAggrFuncArray.h.

itsNr

Array<Int64> casacore::TableExprGroupVariancesArrayDouble::itsNr

protected

Definition at line 800 of file ExprGroupAggrFuncArray.h.

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The documentation for this class was generated from the following file:

• tables/TaQL/ExprGroupAggrFuncArray.h