Aggregate class determining the variance of values in a group. More...
#include <ExprGroupAggrFunc.h>
Public Member Functions | |
| TableExprGroupVarianceDouble (TableExprNodeRep *node, uInt ddof) | |
| virtual | ~TableExprGroupVarianceDouble () |
| 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::TableExprGroupFuncDouble | |
| TableExprGroupFuncDouble (TableExprNodeRep *node, Double initValue=0) | |
| virtual | ~TableExprGroupFuncDouble () |
| virtual Double | getDouble (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 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< Double > | getArrayDouble (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 |
| Int64 | itsNr |
| Double | itsCurMean |
| Protected Attributes inherited from casacore::TableExprGroupFuncDouble | |
| Double | itsValue |
| Protected Attributes inherited from casacore::TableExprGroupFuncBase | |
| TableExprNodeRep * | itsNode |
| TableExprNodeRep * | itsOperand |
| uInt | itsSeqnr |
Detailed Description
Aggregate class determining the variance of values in a group.
Intended use:
Internal
Review Status
- Test programs:
- tExprGroup
Synopsis
Aggregate class determining the variance of values in a group. It uses a running algorithm (see en.wikipedia.org/wiki/Algorithms_for_calculating_variance)
Definition at line 352 of file ExprGroupAggrFunc.h.
Constructor & Destructor Documentation
◆ TableExprGroupVarianceDouble()
|
explicit |
◆ ~TableExprGroupVarianceDouble()
|
virtual |
Member Function Documentation
◆ apply()
|
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 |
If needed, finish the aggregation.
By default nothing is done.
Reimplemented from casacore::TableExprGroupFuncBase.
Reimplemented in casacore::TableExprGroupStdDevDouble.
Member Data Documentation
◆ itsCurMean
|
protected |
Definition at line 362 of file ExprGroupAggrFunc.h.
◆ itsDdof
|
protected |
Definition at line 360 of file ExprGroupAggrFunc.h.
◆ itsNr
|
protected |
Definition at line 361 of file ExprGroupAggrFunc.h.
The documentation for this class was generated from the following file:
- tables/TaQL/ExprGroupAggrFunc.h
