A class to average VisBuffers in time. More...

#include <VisBuffAccumulator.h>

Public Member Functions
	VisBuffAccumulator (const Int &nAnt, const Double &interval, const Bool &prenorm, const Bool fillModel=True)
	Construct from the number of antennas, the averaging interval and the pre-normalization flag.
	~VisBuffAccumulator ()
	Null destructor.
void	reset ()
	Reset the averager.
void	accumulate (const VisBuffer &vb)
	Accumulate a VisBuffer.
void	finalizeAverage ()
	Finalize averaging, and return the result.
VisBuffer &	aveVisBuff ()
	Return a reference to the result TBD: is it ok to return a CVB as a VB reference? (do I need an explicit cast here?
CalVisBuffer &	aveCalVisBuff ()
Double &	timeStamp ()
	Global timestamp info.
Double &	timeStampWt ()
uInt	nBuf ()
	The number of VisBuffers that have been accumulated.
const Vector< Int > &	outToInRow (const Bool hurl=true)
	Return a map from row numbers in the VisBuffer returned by aveVisBuff() or aveCalVisBuff() to row numbers in the input VisBuffer.
Protected Attributes
CalVisBuffer	avBuf_p
	Averaging buffer.
Int	nCorr_p
	Number of correlations and channels.
Int	nChan_p
Private Member Functions
	VisBuffAccumulator ()
	Prohibit null constructor, copy constructor and assignment for now.
VisBuffAccumulator &	operator= (const VisBuffAccumulator &)
	VisBuffAccumulator (const VisBuffAccumulator &)
Int &	prtlev ()
	Diagnostic printing level.
void	initialize (const Bool &copydata)
	Initialize the next accumulation interval.
void	normalize ()
	Normalize the current accumulation.
Int	hashFunction (const Int &ant1, const Int &ant2)
	Hash function to return the row offset for an interferometer (ant1, ant2)
void	throw_err (const String &origin, const String &msg)
	Shuffle error handling elsewhere in an attempt to let the calling function be efficient and inlinable.
Private Attributes
Int	nAnt_p
	Number of antennas.
Double	interval_p
	Averaging interval.
Bool	prenorm_p
	Pre-normalization flag.
Int	prtlev_
	Diagnostic print level.
uInt	nBuf_p
	How many VisBuffers have been accumulated.
Bool	fillModel_p
Double	aveTime_p
	End of initialization list.
Double	aveTimeWt_p
Double	globalTime_p
	Global timestamp average.
Double	globalTimeWt_p
Double	tStart_p
	Start time and row of current accumulation.
Int	avrow_p
Bool	firstInterval_p
	Flag to mark the first accumulation interval.
Vector< Int >	outToInRow_p
	A map from avBuf_p's row numbers to row numbers in the VisBuffer used to fill avBuf_p.

Detailed Description

A class to average VisBuffers in time.

Intended use:

Public interface

Review Status

Date Reviewed:: yyyy/mm/dd

Prerequisite

VisBuffer

Etymology

From "visibility", "time" and "averaging".

Synopsis

This class averages VisBuffers in time.

Example

Motivation

Collect all time averaging capabilities for VisBuffer averaging.

Thrown Exceptions

To Do

averaging over other indices.

Definition at line 74 of file VisBuffAccumulator.h.

Constructor & Destructor Documentation

casa::VisBuffAccumulator::VisBuffAccumulator	(	const Int &	nAnt,
		const Double &	interval,
		const Bool &	prenorm,
		const Bool	fillModel = `True`
	)

Construct from the number of antennas, the averaging interval and the pre-normalization flag.

casa::VisBuffAccumulator::~VisBuffAccumulator ( )

Null destructor.

casa::VisBuffAccumulator::VisBuffAccumulator ( ) [private]

Prohibit null constructor, copy constructor and assignment for now.

casa::VisBuffAccumulator::VisBuffAccumulator ( const VisBuffAccumulator & ) [private]

Member Function Documentation

void casa::VisBuffAccumulator::accumulate ( const VisBuffer & vb )

Accumulate a VisBuffer.

CalVisBuffer& casa::VisBuffAccumulator::aveCalVisBuff ( ) [inline]

Definition at line 98 of file VisBuffAccumulator.h.

References avBuf_p.

VisBuffer& casa::VisBuffAccumulator::aveVisBuff ( ) [inline]

Return a reference to the result TBD: is it ok to return a CVB as a VB reference? (do I need an explicit cast here?

Definition at line 97 of file VisBuffAccumulator.h.

References avBuf_p.

void casa::VisBuffAccumulator::finalizeAverage ( )

Finalize averaging, and return the result.

Int casa::VisBuffAccumulator::hashFunction	(	const Int &	ant1,
		const Int &	ant2
	)		`[private]`

Hash function to return the row offset for an interferometer (ant1, ant2)

void casa::VisBuffAccumulator::initialize ( const Bool & copydata ) [private]

Initialize the next accumulation interval.

uInt casa::VisBuffAccumulator::nBuf ( ) [inline]

The number of VisBuffers that have been accumulated.

Definition at line 105 of file VisBuffAccumulator.h.

References nBuf_p.

void casa::VisBuffAccumulator::normalize ( ) [private]

Normalize the current accumulation.

VisBuffAccumulator& casa::VisBuffAccumulator::operator= ( const VisBuffAccumulator & ) [private]

const Vector<Int>& casa::VisBuffAccumulator::outToInRow ( const Bool hurl = true ) [inline]

Return a map from row numbers in the VisBuffer returned by aveVisBuff() or aveCalVisBuff() to row numbers in the input VisBuffer.

Only useful if nBuf_p == 1 or you are sure that the last input VisBuffer will meet your needs (i.e. all the input VisBuffers had same set of antennas and the metadata you want also matches). hurl controls whether an exception will be thrown if nBuf() != 1. Unfilled rows point to -1.

Definition at line 113 of file VisBuffAccumulator.h.

References nBuf_p, outToInRow_p, and throw_err().

Int& casa::VisBuffAccumulator::prtlev ( ) [inline, private]

Diagnostic printing level.

Definition at line 133 of file VisBuffAccumulator.h.

References prtlev_.

void casa::VisBuffAccumulator::reset ( )

Reset the averager.