An iterator class for MeasurementSets. More...

#include <MSIter.h>

Public Types
enum	PolFrame { Circular, Linear }

Public Member Functions
	MSIter ()
	Default constructor - useful only to assign another iterator later. More...

	MSIter (const MeasurementSet &ms, const Block< Int > &sortColumns, Double timeInterval=0, Bool addDefaultSortColumns=True, Bool storeSorted=True)
	Construct from MS and a Block of MS column enums specifying the iteration order, if none are specified, ARRAY_ID, FIELD_ID, DATA_DESC_ID, and TIME iteration is implicit (unless addDefaultSortColumns=False) These columns will be added first if they are not specified. More...

	MSIter (const Block< MeasurementSet > &mss, const Block< Int > &sortColumns, Double timeInterval=0, Bool addDefaultSortColumns=True, Bool storeSorted=True)
	Same as above with multiple MSs as input. More...

	MSIter (const MeasurementSet &ms, const std::vector< std::pair< String, CountedPtr< BaseCompare >>> &sortColumns)
	This constructor is similar to the previous ones but the comparison functions used to group the iterations are given explicitly, making the constructor more generic. More...

	MSIter (const Block< MeasurementSet > &mss, const std::vector< std::pair< String, CountedPtr< BaseCompare >>> &sortColumns)
	Same as above with multiple MSs as input. More...

	MSIter (const MSIter &other)
	Copy construct. More...

MSIter *	clone () const

virtual	~MSIter ()
	Destructor. More...

MSIter &	operator= (const MSIter &other)
	Assigment. More...

void	setInterval (Double timeInterval)
	Set or reset the time interval to use for iteration. More...

virtual void	origin ()
	Reset iterator to start of data. More...

virtual Bool	more () const
	Return False if there is no more data. More...

virtual MSIter &	operator++ (int)
	Advance iterator through data. More...

virtual MSIter &	operator++ ()

const String &	keyChange () const
	Report Name of slowest column that changes at end of current iteration. More...

Table	table () const
	Return the current Table iteration. More...

const MS &	ms () const
	Return reference to the current MS. More...

const MSColumns &	msColumns () const
	Return reference to the current MSColumns. More...

size_t	msId () const
	Return the current MS Id (according to the order in which they appeared in the constructor) More...

Bool	newMS () const
	Return true if msId has changed since last iteration. More...

const ScalarColumn< Int > &	colArrayIds () const
	Return the current ArrayIds for all rows in this iteration. More...

const ScalarColumn< Int > &	colFieldIds () const
	Return the current FieldIds for all rows in this iteration. More...

const ScalarColumn< Int > &	colDataDescriptionIds () const
	Return the current DataDescriptionIds for all rows in this iteration. More...

Int	arrayId () const
	Return the ArrayId of the first element in this iteration. More...

Bool	newArray () const
	Return True if ArrayId has changed since last iteration Note that if MS_ARRAY is not part of the sorting columns this will always be true. More...

Int	fieldId () const
	Return the FieldId of the first element in this iteration. More...

Bool	newField () const
	Return True if FieldId/Source has changed since last iteration Note that if MS_FIELD_ID is not part of the sorting columns this will always be true. More...

Int	spectralWindowId () const
	Return SpectralWindow of the first element in this iteration. More...

Bool	newSpectralWindow () const
	Return True if SpectralWindow has changed since last iteration Note that if MS_DATA_DESC_ID is not part of the sorting columns this will always be true. More...

Int	dataDescriptionId () const
	Return DataDescriptionId of the first element in this iteration. More...

Bool	newDataDescriptionId () const
	Return True if DataDescriptionId has changed since last iteration Note that if MS_DATA_DESC_ID is not part of the sorting columns this will always be true. More...

Int	polarizationId () const
	Return PolarizationId of the first element in this iteration. More...

Bool	newPolarizationId () const
	Return True if polarization has changed since last iteration Note that if MS_DATA_DESC_ID is not part of the sorting columns this will always be true. More...

Int	polFrame () const
	Return frame for polarization of the first element in this iteration. More...

const Vector< Double > &	frequency () const
	Return the frequencies corresponding to the DATA matrix. More...

const MFrequency &	frequency0 () const
	Return frequency of first channel of the first element in iteration with reference frame as a Measure. More...

const MFrequency &	restFrequency (Int line=0) const
	Return the rest frequency of the specified line as a Measure. More...

const MPosition &	telescopePosition () const
	Return the telescope position (if a known telescope) or the position of the first antenna (if unknown) More...

const Vector< SquareMatrix < Complex, 2 > > &	CJones () const
	Return the feed configuration/leakage matrix for feed 0 on each antenna TODO: CJonesAll can be used instead of this method in all instances. More...

const Matrix< SquareMatrix < Complex, 2 > > &	CJonesAll () const
	Return the feed configuration/leakage matrix for all feeds and antennae First axis is antennaId, 2nd axis is feedId. More...

const Matrix< Double > &	receptorAngle () const
	Return the receptor angle for feed 0 on each antenna. More...

const Cube< Double > &	receptorAngles () const
	Return the receptor angles for all feeds and antennae First axis is a receptor number, 2nd axis is antennaId, 3rd axis is feedId. More...

const Vector< String > &	antennaMounts () const
	Return a string mount identifier for each antenna. More...

const Cube< RigidVector < Double, 2 > > &	getBeamOffsets () const
	Return a cube containing pairs of coordinate offset for each receptor of each feed (values are in radians, coordinate system is fixed with antenna and is the same as used to define the BEAM_OFFSET parameter in the feed table). More...

Bool	allBeamOffsetsZero () const
	True if all elements of the cube returned by getBeamOffsets are zero. More...

void	getSpwInFreqRange (Block< Vector< Int > > &spw, Block< Vector< Int > > &start, Block< Vector< Int > > &nchan, Double freqStart, Double freqEnd, Double freqStep)
	Get the spw, start and nchan for all the ms's is this msiter that match the frequecy "freqstart-freqStep" and "freqEnd+freqStep" range. More...

size_t	numMS () const
	Get the number of actual ms's associated wth this iterator. More...

const MS &	ms (const size_t n) const
	Get a reference to the nth ms in the list of ms associated with this iterator. More...

const MDirection &	phaseCenter () const
	Returns the phasecenter for the first time stamp of the iteration The time is important for field tables that have polynomial or ephemerides phasecenters, i.e time varying for a given field_id. More...

const MDirection	phaseCenter (const Int fldID, const Double timeStamp) const
	If the iterator is set so as one iteration has more that 1 value of time stamp or fieldid then the caller should use the phasecenter with field id and time explicitly. More...

const String &	fieldName () const
	return FIELD table associated current fieldname and sourcename respectively More...

const String &	sourceName () const

Protected Member Functions
void	construct (const Block< Int > &sortColumns, Bool addDefaultSortColumns)
	handle the construction details More...

void	construct (const std::vector< std::pair< String, CountedPtr< BaseCompare >>> &sortColumns)
	handle the construction details using explicit comparison functions More...

void	advance ()
	advance the iteration More...

virtual void	setState ()
	set the iteration state More...

void	setMSInfo ()

void	setArrayInfo ()

void	setFeedInfo () const

void	cacheCurrentDDInfo () const
	Store the current DD, SPW, Pol ID. More...

void	cacheExtraDDInfo () const
	Store extra info related to the DD. More...

void	setFieldInfo () const

Bool	isSubSet (const Vector< rownr_t > &r1, const Vector< rownr_t > &r2)
	Determine if the numbers in r1 are a sorted subset of those in r2. More...

Protected Attributes
MSIter *	This

Block< MeasurementSet >	bms_p

PtrBlock< TableIterator * >	tabIter_p

Block< Bool >	tabIterAtStart_p

Bool	timeInSort_p
	This booleans determine if given columns are part of the sorting. More...

Bool	arrayInSort_p

Bool	ddInSort_p

Bool	fieldInSort_p

size_t	nMS_p

size_t	curMS_p

ssize_t	lastMS_p

CountedPtr< MSColumns >	msc_p

Table	curTable_p

Int	curArrayIdFirst_p

Int	lastArrayId_p

Int	curSourceIdFirst_p

String	curFieldNameFirst_p

String	curSourceNameFirst_p

Int	curFieldIdFirst_p

Int	lastFieldId_p

Int	curDataDescIdFirst_p
	These variables point to the current (as in this iteration) DD, SPW and polarization IDs. More...

Int	curSpectralWindowIdFirst_p

Int	curPolarizationIdFirst_p

Int	lastDataDescId_p
	These variables point to the IDs of the previous iteration. More...

Int	lastSpectralWindowId_p

Int	lastPolarizationId_p

Bool	more_p

Bool	newMS_p

Bool	newArrayId_p

Bool	newFieldId_p

Bool	newSpectralWindowId_p

Bool	newPolarizationId_p

Bool	newDataDescId_p

bool	spwDepFeed_p

bool	checkFeed_p

bool	feedInfoCached_p
	Variable to know whether the feed info is already computed. More...

Bool	storeSorted_p
	Globally control disk storage of SORTED_TABLE. More...

Double	interval_p
	time selection More...

ScalarColumn< Int >	colDataDesc_p
	This column is mutable since it is only attached when it is neccesary to read the DD Ids. More...

ScalarColumn< Int >	colField_p

ScalarColumn< Int >	colArray_p

MDirection	phaseCenter_p

Double	prevFirstTimeStamp_p

Matrix< Double >	receptorAnglesFeed0_p
	cache for access functions More...

Cube< Double >	receptorAngles_p
	temporary retained for compatibility contain actually a reference to the first plane of receptorAngles_p More...

Vector< SquareMatrix< Complex, 2 > >	CJonesFeed0_p

Matrix< SquareMatrix< Complex, 2 > >	CJones_p
	similar to receptorAngle_p More...

Vector< String >	antennaMounts_p

Cube< RigidVector< Double, 2 > >	beamOffsets_p
	antenna (e.g. More...

Bool	allBeamOffsetsZero_p
	each element of the cube in radians) in the antenna coordinate system. More...

PolFrame	polFrame_p
	are zero (to speed things up in a single beam case) More...

Bool	freqCacheOK_p
	hence mutable. More...

Vector< Double >	frequency_p

MFrequency	frequency0_p

MFrequency	restFrequency_p

MPosition	telescopePosition_p

CountedPtr< MSInterval >	timeComp_p

Detailed Description

An iterator class for MeasurementSets.

Intended use:

Public interface

Prerequisite

MeasurementSet

Etymology

MSIter stands for the MeasurementSet Iterator class.

Synopsis

An MSIter is a class to traverse a MeasurementSet in various orders. It automatically adds four predefined sort columns to your selection of sort columns (see constructor) so that it can keep track of changes in frequency or polarization setup, field position and sub-array. Note that this can cause iterations to occur in a different way from what you would expect, see examples below. MSIter implements iteration by time interval for the use of e.g., calibration tasks that want to calculate solutions over some interval of time. You can iterate over multiple MeasurementSets with this class.

Example

// The following code iterates by by ARRAY_ID, FIELD_ID, DATA_DESC_ID and
// TIME (all implicitly added columns) and then by baseline (antenna pair),
// in 3000s intervals.
MeasurementSet ms("3C273XC1.ms");
Block<int> sort(2);
sort[0] = MS::ANTENNA1;
sort[1] = MS::ANTENNA2;
Double timeInterval = 3000;
MSIter msIter(ms,sort,timeInteval);
for (msIter.origin(); msIter.more(); msIter++) {
// print out some of the iteration state
cout << msIter.fieldId() << endl;
cout << msIter.fieldName() << endl;
cout << msIter.dataDescriptionId() << endl;
cout << msIter.frequency0() << endl;
cout << msIter.table().nrow() << endl;
process(msIter.table()); // process the data in the current iteration
}
// Output shows only 1 row at a time because the table is sorted on TIME
// first and ANTENNA1, ANTENNA2 next and each baseline occurs only once per
// TIME stamp. The interval has no effect in this case.

Example

// The following code iterates by baseline (antenna pair), TIME, and,
// implicitly, by ARRAY_ID, FIELD_ID and DATA_DESC_ID in 3000s
// intervals.
MeasurementSet ms("3C273XC1.ms");
Block<int> sort(3);
sort[0] = MS::ANTENNA1;
sort[1] = MS::ANTENNA2;
sort[2] = MS::TIME;
Double timeInterval = 3000;
MSIter msIter(ms,sort,timeInteval);
for (msIter.origin(); msIter.more(); msIter++) {
// print out some of the iteration state
cout << msIter.fieldId() << endl;
cout << msIter.fieldName() << endl;
cout << msIter.dataDescriptionId() << endl;
cout << msIter.frequency0() << endl;
cout << msIter.table().nrow() << endl;
process(msIter.table()); // process the data in the current iteration
// Now the output shows 7 rows at a time, all with identical ANTENNA1
// and ANTENNA2 values and TIME values within a 3000s interval.
}

Motivation

This class was originally part of the VisibilityIterator class, but that class was getting too large and complicated. By splitting out the toplevel iteration into this class the code is much easier to understand. It is now also available through the ms tool.

To Do

multiple observatories in a single MS are not handled correctly (need to sort on observation id and check observatory name to set position frame)

Definition at line 161 of file MSIter.h.

Member Enumeration Documentation

enum casacore::MSIter::PolFrame

Enumerator
Circular	Circular polarization.
Linear	Linear polarization.

Definition at line 164 of file MSIter.h.

Constructor & Destructor Documentation

casacore::MSIter::MSIter ( )

Default constructor - useful only to assign another iterator later.

Use of other member functions on this object is likely to dump core.

casacore::MSIter::MSIter	(	const MeasurementSet &	ms,
		const Block< Int > &	sortColumns,
		Double	timeInterval = `0`,
		Bool	addDefaultSortColumns = `True`,
		Bool	storeSorted = `True`
	)

Construct from MS and a Block of MS column enums specifying the iteration order, if none are specified, ARRAY_ID, FIELD_ID, DATA_DESC_ID, and TIME iteration is implicit (unless addDefaultSortColumns=False) These columns will be added first if they are not specified.

An optional timeInterval can be given to iterate through chunks of time. The default interval of 0 groups all times together. Every 'chunk' of data contains all data within a certain time interval and with identical values of the other iteration columns (e.g. DATA_DESCRIPTION_ID and FIELD_ID). See the examples above for the effect of different sort orders.

The storeSorted parameter determines how the resulting SORT_TABLE is managed. If storeSorted is true then the table will be stored on disk; this potentially allows its reuse in the future but has also been shown to be a problem when the MS is being read in parallel. If storeSorted is false then the SORTED_TABLE is constructed and used in memory which keeps concurrent readers from interfering with each other.

casacore::MSIter::MSIter	(	const Block< MeasurementSet > &	mss,
		const Block< Int > &	sortColumns,
		Double	timeInterval = `0`,
		Bool	addDefaultSortColumns = `True`,
		Bool	storeSorted = `True`
	)

Same as above with multiple MSs as input.

casacore::MSIter::MSIter	(	const MeasurementSet &	ms,
		const std::vector< std::pair< String, CountedPtr< BaseCompare >>> &	sortColumns
	)

This constructor is similar to the previous ones but the comparison functions used to group the iterations are given explicitly, making the constructor more generic.

Also, the column is specified as a string, to support sorting by columns not part of the standard MS definition. Note that with this constructor TIME is not treated in any special way and there are no default sorting columns, i.e., the sorting needs have to be set explicitly. The last element in vector sortColumns will be the column that will change faster in the iteration loop, whereas the first element will be the slower. For instance, if sortColumns[0].first = "DATA_DESC_ID" nad sortColumns[1].first = "ANTENNA1" then the first iterations will go through all possible values of ANTENNA1 for the first DDId, then it will start the iterations for the second DDId and so on.

casacore::MSIter::MSIter	(	const Block< MeasurementSet > &	mss,
		const std::vector< std::pair< String, CountedPtr< BaseCompare >>> &	sortColumns
	)

Same as above with multiple MSs as input.

casacore::MSIter::MSIter ( const MSIter & other )

Copy construct.

This calls the assigment operator.

virtual casacore::MSIter::~MSIter ( )

virtual

Destructor.

Member Function Documentation

void casacore::MSIter::advance ( )

protected

advance the iteration

Bool casacore::MSIter::allBeamOffsetsZero ( ) const

inline

True if all elements of the cube returned by getBeamOffsets are zero.

Definition at line 557 of file MSIter.h.

References allBeamOffsetsZero_p, feedInfoCached_p, and setFeedInfo().

const Vector< String > & casacore::MSIter::antennaMounts ( ) const

inline

Return a string mount identifier for each antenna.

Definition at line 553 of file MSIter.h.

References antennaMounts_p.

Int casacore::MSIter::arrayId ( ) const

inline

Return the ArrayId of the first element in this iteration.

Definition at line 527 of file MSIter.h.

References curArrayIdFirst_p.

void casacore::MSIter::cacheCurrentDDInfo ( ) const

protected

Store the current DD, SPW, Pol ID.

It can be called in logically const objects although it modifies caching (mutable) variables for performance reasons.

Referenced by colDataDescriptionIds(), dataDescriptionId(), polarizationId(), polFrame(), and spectralWindowId().

void casacore::MSIter::cacheExtraDDInfo ( ) const

protected

Store extra info related to the DD.

It can be called in logically const objects although it modifies caching (mutable) variables for performance reasons.

Referenced by colDataDescriptionIds(), dataDescriptionId(), polarizationId(), polFrame(), and spectralWindowId().

const Vector< SquareMatrix< Complex, 2 > > & casacore::MSIter::CJones ( ) const

inline

Return the feed configuration/leakage matrix for feed 0 on each antenna TODO: CJonesAll can be used instead of this method in all instances.

Definition at line 545 of file MSIter.h.

References CJonesFeed0_p, feedInfoCached_p, and setFeedInfo().

const Matrix< SquareMatrix< Complex, 2 > > & casacore::MSIter::CJonesAll ( ) const

inline

Return the feed configuration/leakage matrix for all feeds and antennae First axis is antennaId, 2nd axis is feedId.

Result of CJones() is a reference to the first column of the matrix returned by this method

Definition at line 547 of file MSIter.h.

References CJones_p, feedInfoCached_p, and setFeedInfo().

MSIter* casacore::MSIter::clone ( ) const

const ScalarColumn< Int > & casacore::MSIter::colArrayIds ( ) const

inline

Return the current ArrayIds for all rows in this iteration.

Definition at line 520 of file MSIter.h.

References colArray_p.

const ScalarColumn< Int > & casacore::MSIter::colDataDescriptionIds ( ) const

inline

Return the current DataDescriptionIds for all rows in this iteration.

Definition at line 524 of file MSIter.h.

References cacheCurrentDDInfo(), cacheExtraDDInfo(), colDataDesc_p, and curDataDescIdFirst_p.

const ScalarColumn< Int > & casacore::MSIter::colFieldIds ( ) const

inline

Return the current FieldIds for all rows in this iteration.

Definition at line 522 of file MSIter.h.

References colField_p.

void casacore::MSIter::construct	(	const Block< Int > &	sortColumns,
		Bool	addDefaultSortColumns
	)

protected

handle the construction details

void casacore::MSIter::construct ( const std::vector< std::pair< String, CountedPtr< BaseCompare >>> & sortColumns )

protected

handle the construction details using explicit comparison functions

Int casacore::MSIter::dataDescriptionId ( ) const

inline

Return DataDescriptionId of the first element in this iteration.

Definition at line 535 of file MSIter.h.

References cacheCurrentDDInfo(), cacheExtraDDInfo(), and curDataDescIdFirst_p.

Int casacore::MSIter::fieldId ( ) const

inline

Return the FieldId of the first element in this iteration.

Definition at line 528 of file MSIter.h.

References curFieldIdFirst_p, and setFieldInfo().

const String& casacore::MSIter::fieldName ( ) const

return FIELD table associated current fieldname and sourcename respectively

const Vector<Double>& casacore::MSIter::frequency ( ) const

Return the frequencies corresponding to the DATA matrix.

const MFrequency& casacore::MSIter::frequency0 ( ) const

Return frequency of first channel of the first element in iteration with reference frame as a Measure.

The reference frame Epoch is that of the first row, reset it as needed for each row. The reference frame Position is the average of the antenna positions.

const Cube< RigidVector< Double, 2 > > & casacore::MSIter::getBeamOffsets ( ) const

inline

Return a cube containing pairs of coordinate offset for each receptor of each feed (values are in radians, coordinate system is fixed with antenna and is the same as used to define the BEAM_OFFSET parameter in the feed table).

The cube axes are receptor, antenna, feed.

Definition at line 555 of file MSIter.h.

References beamOffsets_p, feedInfoCached_p, and setFeedInfo().

void casacore::MSIter::getSpwInFreqRange	(	Block< Vector< Int > > &	spw,
		Block< Vector< Int > > &	start,
		Block< Vector< Int > > &	nchan,
		Double	freqStart,
		Double	freqEnd,
		Double	freqStep
	)

Get the spw, start and nchan for all the ms's is this msiter that match the frequecy "freqstart-freqStep" and "freqEnd+freqStep" range.

Bool casacore::MSIter::isSubSet	(	const Vector< rownr_t > &	r1,
		const Vector< rownr_t > &	r2
	)

protected

Determine if the numbers in r1 are a sorted subset of those in r2.

const String& casacore::MSIter::keyChange ( ) const

Report Name of slowest column that changes at end of current iteration.

Bool casacore::MSIter::more ( ) const

inlinevirtual

Return False if there is no more data.

Definition at line 509 of file MSIter.h.

References more_p.

const MS & casacore::MSIter::ms ( ) const

inline

Return reference to the current MS.

Definition at line 511 of file MSIter.h.

References bms_p, and curMS_p.

const MS& casacore::MSIter::ms ( const size_t n ) const

Get a reference to the nth ms in the list of ms associated with this iterator.

If larger than the list of ms's current ms is returned So better check wth numMS() before making the call

const MSColumns & casacore::MSIter::msColumns ( ) const

inline

Return reference to the current MSColumns.

Definition at line 512 of file MSIter.h.

References msc_p.

size_t casacore::MSIter::msId ( ) const

inline

Return the current MS Id (according to the order in which they appeared in the constructor)

Definition at line 518 of file MSIter.h.

References curMS_p.

Bool casacore::MSIter::newArray ( ) const

inline

Return True if ArrayId has changed since last iteration Note that if MS_ARRAY is not part of the sorting columns this will always be true.

Definition at line 514 of file MSIter.h.

References newArrayId_p.

Bool casacore::MSIter::newDataDescriptionId ( ) const

inline

Return True if DataDescriptionId has changed since last iteration Note that if MS_DATA_DESC_ID is not part of the sorting columns this will always be true.

Definition at line 539 of file MSIter.h.

References newDataDescId_p.

Bool casacore::MSIter::newField ( ) const

inline

Return True if FieldId/Source has changed since last iteration Note that if MS_FIELD_ID is not part of the sorting columns this will always be true.

Definition at line 515 of file MSIter.h.

References newFieldId_p.

Bool casacore::MSIter::newMS ( ) const

inline

Return true if msId has changed since last iteration.

Definition at line 513 of file MSIter.h.

References newMS_p.

Bool casacore::MSIter::newPolarizationId ( ) const

inline

Return True if polarization has changed since last iteration Note that if MS_DATA_DESC_ID is not part of the sorting columns this will always be true.

Definition at line 538 of file MSIter.h.

References newPolarizationId_p.

Bool casacore::MSIter::newSpectralWindow ( ) const

inline

Return True if SpectralWindow has changed since last iteration Note that if MS_DATA_DESC_ID is not part of the sorting columns this will always be true.

Definition at line 516 of file MSIter.h.

References newSpectralWindowId_p.

size_t casacore::MSIter::numMS ( ) const

inline

Get the number of actual ms's associated wth this iterator.

Definition at line 519 of file MSIter.h.

References nMS_p.

virtual MSIter& casacore::MSIter::operator++ ( int )

virtual

Advance iterator through data.

virtual MSIter& casacore::MSIter::operator++ ( )

virtual

MSIter& casacore::MSIter::operator= ( const MSIter & other )

Assigment.

This will reset the iterator to the origin.

virtual void casacore::MSIter::origin ( )

virtual

Reset iterator to start of data.

const MDirection& casacore::MSIter::phaseCenter ( ) const

Returns the phasecenter for the first time stamp of the iteration The time is important for field tables that have polynomial or ephemerides phasecenters, i.e time varying for a given field_id.

If the iterator is set so as one iteration has more that 1 time stamp then this version is correct only for fixed phasecenters

const MDirection casacore::MSIter::phaseCenter	(	const Int	fldID,
		const Double	timeStamp
	)		const

If the iterator is set so as one iteration has more that 1 value of time stamp or fieldid then the caller should use the phasecenter with field id and time explicitly.

Int casacore::MSIter::polarizationId ( ) const

inline

Return PolarizationId of the first element in this iteration.

Definition at line 532 of file MSIter.h.

References cacheCurrentDDInfo(), cacheExtraDDInfo(), and curPolarizationIdFirst_p.

Int casacore::MSIter::polFrame ( ) const

inline

Return frame for polarization of the first element in this iteration.

Returns: PolFrame enum

Definition at line 540 of file MSIter.h.

References cacheCurrentDDInfo(), cacheExtraDDInfo(), curPolarizationIdFirst_p, and polFrame_p.

const Matrix< Double > & casacore::MSIter::receptorAngle ( ) const

inline

Return the receptor angle for feed 0 on each antenna.

First axis is receptor number, 2nd axis is antennaId. TODO: receptorAngles() can be used instead of this method

Definition at line 549 of file MSIter.h.

References feedInfoCached_p, receptorAnglesFeed0_p, and setFeedInfo().

const Cube< Double > & casacore::MSIter::receptorAngles ( ) const

inline

Return the receptor angles for all feeds and antennae First axis is a receptor number, 2nd axis is antennaId, 3rd axis is feedId.

Result of receptorAngle() is just a reference to the first plane of the cube returned by this method

Definition at line 551 of file MSIter.h.

References feedInfoCached_p, receptorAngles_p, and setFeedInfo().

const MFrequency& casacore::MSIter::restFrequency ( Int line = 0 ) const

Return the rest frequency of the specified line as a Measure.

void casacore::MSIter::setArrayInfo ( )

protected

void casacore::MSIter::setFeedInfo ( ) const

protected

Referenced by allBeamOffsetsZero(), CJones(), CJonesAll(), getBeamOffsets(), receptorAngle(), and receptorAngles().

void casacore::MSIter::setFieldInfo ( ) const

protected

Referenced by fieldId().

void casacore::MSIter::setInterval ( Double timeInterval )

Set or reset the time interval to use for iteration.

You should call origin() to reset the iteration after calling this.

void casacore::MSIter::setMSInfo ( )

protected

virtual void casacore::MSIter::setState ( )

protectedvirtual

set the iteration state

const String& casacore::MSIter::sourceName ( ) const

Int casacore::MSIter::spectralWindowId ( ) const

inline

Return SpectralWindow of the first element in this iteration.

Definition at line 529 of file MSIter.h.

References cacheCurrentDDInfo(), cacheExtraDDInfo(), and curSpectralWindowIdFirst_p.

Table casacore::MSIter::table ( ) const

inline

Return the current Table iteration.

Definition at line 510 of file MSIter.h.

References curTable_p.

const MPosition & casacore::MSIter::telescopePosition ( ) const

inline

Return the telescope position (if a known telescope) or the position of the first antenna (if unknown)

Definition at line 543 of file MSIter.h.

References telescopePosition_p.

Member Data Documentation

Bool casacore::MSIter::allBeamOffsetsZero_p

mutableprotected

each element of the cube in radians) in the antenna coordinate system.

Cube axes are: receptor, antenna, feed.

Definition at line 494 of file MSIter.h.

Referenced by allBeamOffsetsZero().

Vector<String> casacore::MSIter::antennaMounts_p

protected

Definition at line 488 of file MSIter.h.

Referenced by antennaMounts().

Bool casacore::MSIter::arrayInSort_p

protected

Definition at line 436 of file MSIter.h.

Cube<RigidVector<Double, 2> > casacore::MSIter::beamOffsets_p

mutableprotected

antenna (e.g.

EQUATORIAL, ALT-AZ,...)

Definition at line 490 of file MSIter.h.

Referenced by getBeamOffsets().

Block<MeasurementSet> casacore::MSIter::bms_p

protected

Definition at line 431 of file MSIter.h.

Referenced by ms().

bool casacore::MSIter::checkFeed_p

mutableprotected

Definition at line 459 of file MSIter.h.

Matrix<SquareMatrix<Complex,2> > casacore::MSIter::CJones_p

mutableprotected

similar to receptorAngle_p

Definition at line 487 of file MSIter.h.

Referenced by CJonesAll().

Vector<SquareMatrix<Complex,2> > casacore::MSIter::CJonesFeed0_p

mutableprotected

Definition at line 485 of file MSIter.h.

Referenced by CJones().

ScalarColumn<Int> casacore::MSIter::colArray_p

protected

Definition at line 475 of file MSIter.h.

Referenced by colArrayIds().

ScalarColumn<Int> casacore::MSIter::colDataDesc_p

mutableprotected

This column is mutable since it is only attached when it is neccesary to read the DD Ids.

That might happen when calling a const accesor like dataDescriptionId().

Definition at line 474 of file MSIter.h.

Referenced by colDataDescriptionIds().

ScalarColumn<Int> casacore::MSIter::colField_p

mutableprotected

Definition at line 474 of file MSIter.h.

Referenced by colFieldIds().

Int casacore::MSIter::curArrayIdFirst_p

protected

Definition at line 442 of file MSIter.h.

Referenced by arrayId().

Int casacore::MSIter::curDataDescIdFirst_p

mutableprotected

These variables point to the current (as in this iteration) DD, SPW and polarization IDs.

They are mutable since they are evaluated in a lazy way, i.e., only when needed. If the DDId is part of the sorting columns then it is always computed when calling next(), otherwise it is only computed when some accesor of metadata that depends on them is called by the application.

Definition at line 453 of file MSIter.h.

Referenced by colDataDescriptionIds(), and dataDescriptionId().

Int casacore::MSIter::curFieldIdFirst_p

mutableprotected

Definition at line 445 of file MSIter.h.

Referenced by fieldId().

String casacore::MSIter::curFieldNameFirst_p

mutableprotected

Definition at line 443 of file MSIter.h.

size_t casacore::MSIter::curMS_p

protected

Definition at line 438 of file MSIter.h.

Referenced by ms(), and msId().

Int casacore::MSIter::curPolarizationIdFirst_p

mutableprotected

Definition at line 453 of file MSIter.h.

Referenced by polarizationId(), and polFrame().

Int casacore::MSIter::curSourceIdFirst_p

protected

Definition at line 442 of file MSIter.h.

String casacore::MSIter::curSourceNameFirst_p

protected

Definition at line 444 of file MSIter.h.

Int casacore::MSIter::curSpectralWindowIdFirst_p

mutableprotected

Definition at line 453 of file MSIter.h.

Referenced by spectralWindowId().

Table casacore::MSIter::curTable_p

protected

Definition at line 441 of file MSIter.h.

Referenced by table().

Bool casacore::MSIter::ddInSort_p

protected

Definition at line 436 of file MSIter.h.

bool casacore::MSIter::feedInfoCached_p

mutableprotected

Variable to know whether the feed info is already computed.

Definition at line 462 of file MSIter.h.

Referenced by allBeamOffsetsZero(), CJones(), CJonesAll(), getBeamOffsets(), receptorAngle(), and receptorAngles().

Bool casacore::MSIter::fieldInSort_p

protected

Definition at line 436 of file MSIter.h.

Bool casacore::MSIter::freqCacheOK_p

mutableprotected

hence mutable.

See cacheExtraDDInfo()

Definition at line 499 of file MSIter.h.

MFrequency casacore::MSIter::frequency0_p

protected

Definition at line 501 of file MSIter.h.

Vector<Double> casacore::MSIter::frequency_p

mutableprotected

Definition at line 500 of file MSIter.h.

Double casacore::MSIter::interval_p

protected

time selection

Definition at line 469 of file MSIter.h.

Int casacore::MSIter::lastArrayId_p

protected

Definition at line 442 of file MSIter.h.

Int casacore::MSIter::lastDataDescId_p

protected

These variables point to the IDs of the previous iteration.

Definition at line 456 of file MSIter.h.

Int casacore::MSIter::lastFieldId_p

protected

Definition at line 446 of file MSIter.h.

ssize_t casacore::MSIter::lastMS_p

protected

Definition at line 439 of file MSIter.h.

Int casacore::MSIter::lastPolarizationId_p

protected

Definition at line 456 of file MSIter.h.

Int casacore::MSIter::lastSpectralWindowId_p

protected

Definition at line 456 of file MSIter.h.

Bool casacore::MSIter::more_p

protected

Definition at line 457 of file MSIter.h.

Referenced by more().

CountedPtr<MSColumns> casacore::MSIter::msc_p

protected

Definition at line 440 of file MSIter.h.

Referenced by msColumns().

Bool casacore::MSIter::newArrayId_p

protected

Definition at line 457 of file MSIter.h.

Referenced by newArray().

Bool casacore::MSIter::newDataDescId_p

protected

Definition at line 457 of file MSIter.h.

Referenced by newDataDescriptionId().

Bool casacore::MSIter::newFieldId_p

protected

Definition at line 457 of file MSIter.h.

Referenced by newField().

Bool casacore::MSIter::newMS_p

protected

Definition at line 457 of file MSIter.h.

Referenced by newMS().

Bool casacore::MSIter::newPolarizationId_p

protected

Definition at line 457 of file MSIter.h.

Referenced by newPolarizationId().

Bool casacore::MSIter::newSpectralWindowId_p

protected

Definition at line 457 of file MSIter.h.

Referenced by newSpectralWindow().

size_t casacore::MSIter::nMS_p

protected

Definition at line 438 of file MSIter.h.

Referenced by numMS().

MDirection casacore::MSIter::phaseCenter_p

mutableprotected

Definition at line 477 of file MSIter.h.

PolFrame casacore::MSIter::polFrame_p

mutableprotected

are zero (to speed things up in a single beam case)

Definition at line 497 of file MSIter.h.

Referenced by polFrame().

Double casacore::MSIter::prevFirstTimeStamp_p

mutableprotected

Definition at line 478 of file MSIter.h.

Cube<Double> casacore::MSIter::receptorAngles_p

mutableprotected

temporary retained for compatibility contain actually a reference to the first plane of receptorAngles_p

Definition at line 484 of file MSIter.h.

Referenced by receptorAngles().

Matrix<Double> casacore::MSIter::receptorAnglesFeed0_p

mutableprotected

cache for access functions

Definition at line 480 of file MSIter.h.

Referenced by receptorAngle().

MFrequency casacore::MSIter::restFrequency_p

protected

Definition at line 502 of file MSIter.h.

bool casacore::MSIter::spwDepFeed_p

mutableprotected

Definition at line 459 of file MSIter.h.

Bool casacore::MSIter::storeSorted_p

protected

Globally control disk storage of SORTED_TABLE.

Definition at line 466 of file MSIter.h.

PtrBlock<TableIterator* > casacore::MSIter::tabIter_p

protected

Definition at line 432 of file MSIter.h.

Block<Bool> casacore::MSIter::tabIterAtStart_p

protected

Definition at line 433 of file MSIter.h.

MPosition casacore::MSIter::telescopePosition_p

protected

Definition at line 503 of file MSIter.h.

Referenced by telescopePosition().

MSIter* casacore::MSIter::This

protected

Definition at line 430 of file MSIter.h.

CountedPtr<MSInterval> casacore::MSIter::timeComp_p

protected

Definition at line 505 of file MSIter.h.

Bool casacore::MSIter::timeInSort_p

protected

This booleans determine if given columns are part of the sorting.

Definition at line 436 of file MSIter.h.

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

ms/MeasurementSets/MSIter.h

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Intended use:

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Etymology

Synopsis

Example

Example

Motivation

To Do

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