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casacore::LatticeStatsDataProvider< T > Class Template Reference

Data provider which allows stats framework to iterate through an unmasked lattice. More...

#include <LatticeStatsDataProvider.h>

Inheritance diagram for casacore::LatticeStatsDataProvider< T >:
casacore::LatticeStatsDataProviderBase< T > casacore::StatsDataProvider< NumericTraits< T >::PrecisionType, const T *, const Bool * >

Public Member Functions

 LatticeStatsDataProvider ()
 default constructor, must set lattice after construction but before using the object More...
 
 LatticeStatsDataProvider (const Lattice< T > &lattice, uInt iteratorLimitBytes=4096 *4096)
 iteratorLimitBytes is related to the size of the lattice. More...
 
 ~LatticeStatsDataProvider ()
 
void operator++ ()
 increment the data provider to the next dataset, mask, range set, and weights. More...
 
uInt estimatedSteps () const
 estimated number of steps to iterate through the the lattice More...
 
Bool atEnd () const
 Are there any data sets left to provide? More...
 
void finalize ()
 Take any actions necessary to finalize the provider. More...
 
uInt64 getCount ()
 get the count of elements in the current data set. More...
 
const T * getData ()
 get the current data set More...
 
const BoolgetMask ()
 Get the associated mask of the current dataset. More...
 
uInt getNMaxThreads () const
 returns something reasonable based on the lattice size. More...
 
Bool hasMask () const
 Does the current data set have an associated mask? More...
 
void reset ()
 reset the provider to point to the first data set it manages. More...
 
void setLattice (const Lattice< T > &lattice, uInt iteratorLimitBytes=4096 *4096)
 set the lattice. More...
 
void updateMaxPos (const std::pair< Int64, Int64 > &maxpos)
 see base class documentation. More...
 
void updateMinPos (const std::pair< Int64, Int64 > &minpos)
 
- Public Member Functions inherited from casacore::LatticeStatsDataProviderBase< T >
virtual ~LatticeStatsDataProviderBase ()
 
uInt getMaskStride ()
 Get the stride for the current mask (only called if hasMask() returns True). More...
 
std::vector< std::pair
< typename NumericTraits< T >
::PrecisionType, typename
NumericTraits< T >
::PrecisionType > > 
getRanges ()
 Get the associated range(s) of the current dataset. More...
 
uInt getStride ()
 Get the stride for the current data set. More...
 
const T * getWeights ()
 Returns NULL; lattices do not have associated weights. More...
 
Bool hasRanges () const
 Does the current data set have associated range(s)? More...
 
Bool hasWeights () const
 returns False; lattices do not have associated weights. More...
 
Bool isInclude () const
 If the associated data set has ranges, are these include (return True) or exclude (return False) ranges? More...
 
void minMaxPos (IPosition &minpos, IPosition &maxpos) const
 get the positions of the min and max More...
 
void setProgressMeter (CountedPtr< LattStatsProgress > pm)
 
void setRanges (const std::vector< std::pair< typename NumericTraits< T >::PrecisionType, typename NumericTraits< T >::PrecisionType > > &ranges, Bool isInclude)
 set the data ranges More...
 
- Public Member Functions inherited from casacore::StatsDataProvider< NumericTraits< T >::PrecisionType, const T *, const Bool * >
virtual ~StatsDataProvider ()
 
virtual void updateMaxPos (const LocationType &)
 In general, unless you are writing statistics algorithm code, you shouldn't need to call these methods. More...
 
virtual void updateMinPos (const LocationType &)
 

Private Member Functions

void _freeStorage ()
 

Private Attributes

CountedPtr< RO_LatticeIterator
< T > > 
_iter
 
Array< T > _currentSlice
 
const T * _currentPtr
 
Bool _delData
 
Bool _atEnd
 
uInt _nMaxThreads
 

Additional Inherited Members

- Protected Member Functions inherited from casacore::LatticeStatsDataProviderBase< T >
 LatticeStatsDataProviderBase ()
 
void _updateMaxPos (const IPosition &maxPos)
 
void _updateMinPos (const IPosition &minPos)
 
void _updateProgress ()
 
- Protected Member Functions inherited from casacore::StatsDataProvider< NumericTraits< T >::PrecisionType, const T *, const Bool * >
 StatsDataProvider ()
 

Detailed Description

template<class T>
class casacore::LatticeStatsDataProvider< T >

Data provider which allows stats framework to iterate through an unmasked lattice.

Definition at line 39 of file LatticeStatsDataProvider.h.

Constructor & Destructor Documentation

default constructor, must set lattice after construction but before using the object

template<class T>
casacore::LatticeStatsDataProvider< T >::LatticeStatsDataProvider ( const Lattice< T > &  lattice,
uInt  iteratorLimitBytes = 4096 *4096 
)

iteratorLimitBytes is related to the size of the lattice.

If the lattice is greater than this size, then a lattice iterator will be used to step through the lattice. If less, then all the data in the values in the lattice are retrieved in a single chunk. The advantage of the iterator is that less memory is used. The disadvantage is there is a significant performace cost, so if the lattice is small, it is better to get all its values in a single chunk and forgo the iterator. This is particularly true when looping for a large number of iterations and creating a LatticeStatsDataProvider each loop (in that case, you probably will want to create a single object before the loop and use setLattice() to update its lattice).

Member Function Documentation

template<class T>
void casacore::LatticeStatsDataProvider< T >::_freeStorage ( )
private
template<class T>
Bool casacore::LatticeStatsDataProvider< T >::atEnd ( ) const
virtual
template<class T>
uInt casacore::LatticeStatsDataProvider< T >::estimatedSteps ( ) const
virtual

estimated number of steps to iterate through the the lattice

Implements casacore::LatticeStatsDataProviderBase< T >.

template<class T>
void casacore::LatticeStatsDataProvider< T >::finalize ( )
virtual

Take any actions necessary to finalize the provider.

This will be called when atEnd() returns True.

Reimplemented from casacore::LatticeStatsDataProviderBase< T >.

template<class T>
uInt64 casacore::LatticeStatsDataProvider< T >::getCount ( )
virtual

get the count of elements in the current data set.

When implementing this method, be certain to take stride into account; ie for a data set with nominally 100 elements that is to have a stride of two, this method should return 50.

Implements casacore::StatsDataProvider< NumericTraits< T >::PrecisionType, const T *, const Bool * >.

template<class T>
const T* casacore::LatticeStatsDataProvider< T >::getData ( )
virtual
template<class T>
const Bool* casacore::LatticeStatsDataProvider< T >::getMask ( )
virtual

Get the associated mask of the current dataset.

Only called if hasMask() returns True;

Implements casacore::StatsDataProvider< NumericTraits< T >::PrecisionType, const T *, const Bool * >.

template<class T>
uInt casacore::LatticeStatsDataProvider< T >::getNMaxThreads ( ) const
virtual

returns something reasonable based on the lattice size.

Reimplemented from casacore::StatsDataProvider< NumericTraits< T >::PrecisionType, const T *, const Bool * >.

template<class T>
Bool casacore::LatticeStatsDataProvider< T >::hasMask ( ) const
virtual

Does the current data set have an associated mask?

Implements casacore::StatsDataProvider< NumericTraits< T >::PrecisionType, const T *, const Bool * >.

template<class T>
void casacore::LatticeStatsDataProvider< T >::operator++ ( )
virtual

increment the data provider to the next dataset, mask, range set, and weights.

Implements casacore::StatsDataProvider< NumericTraits< T >::PrecisionType, const T *, const Bool * >.

template<class T>
void casacore::LatticeStatsDataProvider< T >::reset ( )
virtual

reset the provider to point to the first data set it manages.

Reimplemented from casacore::LatticeStatsDataProviderBase< T >.

template<class T>
void casacore::LatticeStatsDataProvider< T >::setLattice ( const Lattice< T > &  lattice,
uInt  iteratorLimitBytes = 4096 *4096 
)

set the lattice.

Automatically resets the lattice iterator iteratorLimitBytes is related to the size of the lattice. If the lattice is greater than this size, then a lattice iterator will be used to step through the lattice. If less, then all the data in the values in the lattice are retrieved in a single chunk. The advantage of the iterator is that less memory is used. The disadvantage is there is a significant performace cost, so if the lattice is small, it is better to get all its values in a single chunk and forgo the iterator. This is particularly true when looping for a large number of iterations and creating a LatticeStatsDataProvider each loop (in that case, you probably will want to create a single object before the loop and use setLattice() to update its lattice).

template<class T>
void casacore::LatticeStatsDataProvider< T >::updateMaxPos ( const std::pair< Int64, Int64 > &  maxpos)

see base class documentation.

template<class T>
void casacore::LatticeStatsDataProvider< T >::updateMinPos ( const std::pair< Int64, Int64 > &  minpos)

Member Data Documentation

template<class T>
Bool casacore::LatticeStatsDataProvider< T >::_atEnd
private

Definition at line 124 of file LatticeStatsDataProvider.h.

template<class T>
const T* casacore::LatticeStatsDataProvider< T >::_currentPtr
private

Definition at line 123 of file LatticeStatsDataProvider.h.

template<class T>
Array<T> casacore::LatticeStatsDataProvider< T >::_currentSlice
private

Definition at line 122 of file LatticeStatsDataProvider.h.

template<class T>
Bool casacore::LatticeStatsDataProvider< T >::_delData
private

Definition at line 124 of file LatticeStatsDataProvider.h.

template<class T>
CountedPtr<RO_LatticeIterator<T> > casacore::LatticeStatsDataProvider< T >::_iter
private

Definition at line 121 of file LatticeStatsDataProvider.h.

template<class T>
uInt casacore::LatticeStatsDataProvider< T >::_nMaxThreads
private

Definition at line 125 of file LatticeStatsDataProvider.h.


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