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escript::DataConstant Class Reference

DataConstant stores a single data point which represents the entire function space. More...

#include <DataConstant.h>

Inheritance diagram for escript::DataConstant:
escript::DataReady escript::DataAbstract

Public Member Functions

 DataConstant (const WrappedArray &value, const FunctionSpace &what)
 Constructor for DataConstant objects. More...
 
 DataConstant (const DataConstant &other)
 Copy constructor. Performs a deep copy. More...
 
 DataConstant (const DataConstant &other, const DataTypes::RegionType &region)
 Alternative constructor for DataConstant objects. More...
 
 DataConstant (const FunctionSpace &what, const DataTypes::ShapeType &shape, const DataTypes::ValueType &data)
 Alternative constructor for DataConstant objects. More...
 
 DataConstant (const FunctionSpace &what, const DataTypes::ShapeType &shape, const double v)
 
bool isConstant () const
 
bool hasNaN () const
 Return true if the value contains a NaN. More...
 
void replaceNaN (double value)
 replaces all NaN values with value More...
 
std::string toString () const
 Write the data as a string. More...
 
virtual DataAbstractdeepCopy ()
 Return a deep copy of the current object. More...
 
virtual void dump (const std::string fileName) const
 dumps the object into a netCDF file More...
 
virtual void setToZero ()
 sets all values to zero More...
 
virtual DataTypes::ValueType::size_type getPointOffset (int sampleNo, int dataPointNo) const
 Return the offset for the given sample. This is a somewhat artificial notion but returns the offset in bytes for the given point into the container holding the point data. Only really necessary to avoid many DataArrayView objects. More...
 
virtual DataTypes::ValueType::size_type getPointOffset (int sampleNo, int dataPointNo)
 
virtual DataTypes::ValueType::size_type getLength () const
 Return the number of doubles stored for the Data object. More...
 
virtual DataAbstractgetSlice (const DataTypes::RegionType &region) const
 Factory method that returns a newly created DataConstant object sliced from the specified region of this object. The caller is reponsible for managing the object created. More...
 
virtual void setSlice (const DataAbstract *value, const DataTypes::RegionType &region)
 Copy the specified region from the given value. More...
 
virtual void symmetric (DataAbstract *ev)
 Computes a symmetric matrix (A + AT) / 2. More...
 
virtual void nonsymmetric (DataAbstract *ev)
 Computes a nonsymmetric matrix (A - AT) / 2. More...
 
virtual void trace (DataAbstract *ev, int axis_offset)
 Computes the trace of a matrix. More...
 
virtual void transpose (DataAbstract *ev, int axis_offset)
 Transpose each data point of this Data object around the given axis. More...
 
virtual void swapaxes (DataAbstract *ev, int axis0, int axis1)
 swaps components axis0 and axis1 More...
 
virtual void eigenvalues (DataAbstract *ev)
 solves the eigenvalue problem this*V=ev*V for the eigenvalues ev More...
 
virtual void eigenvalues_and_eigenvectors (DataAbstract *ev, DataAbstract *V, const double tol=1.e-13)
 solves the eigenvalue problem this*V=ev*V for the eigenvalues ev and eigenvectors V More...
 
virtual int matrixInverse (DataAbstract *out) const
 invert square matricies More...
 
DataTypes::ValueTypegetVectorRW ()
 Return a reference to the underlying DataVector. More...
 
const DataTypes::ValueTypegetVectorRO () const
 
- Public Member Functions inherited from escript::DataReady
 DataReady (const FunctionSpace &what, const ShapeType &shape, bool isDataEmpty=false)
 
 ~DataReady ()
 
double * getSampleDataRW (ValueType::size_type sampleNo)
 Return the sample data for the given sample number. More...
 
const double * getSampleDataRO (ValueType::size_type sampleNo) const
 
DataTypes::ValueType::const_reference getDataAtOffsetRO (DataTypes::ValueType::size_type i) const
 get a reference to the beginning of a data point More...
 
DataTypes::ValueType::reference getDataAtOffsetRW (DataTypes::ValueType::size_type i)
 
DataReady_ptr resolve ()
 Return a data object with all points resolved. More...
 
- Public Member Functions inherited from escript::DataAbstract
DataAbstract_ptr getPtr ()
 Return shared pointer managing this object. More...
 
const_DataAbstract_ptr getPtr () const
 
 DataAbstract (const FunctionSpace &what, const ShapeType &shape, bool isDataEmpty=false)
 Constructor for DataAbstract. More...
 
virtual ~DataAbstract ()
 Destructor for DataAbstract. More...
 
int getNumDPPSample () const
 Return the number of data points per sample. More...
 
int getNumSamples () const
 Return the number of samples. More...
 
const DataTypes::ShapeTypegetShape () const
 Return the shape information for the point data. More...
 
unsigned int getRank () const
 Return the rank information for the point data. More...
 
virtual double * getSampleDataByTag (int tag)
 Return the sample data for the given tag key. NB: If the data isn't tagged an exception will be thrown. More...
 
virtual size_t getTagCount () const
 Return number of tagged values stored in the data object. More...
 
void operandCheck (const DataAbstract &right) const
 Check this and the given RHS operands are compatible. Throws an exception if they aren't. More...
 
bool validSamplePointNo (int samplePointNo) const
 Return true if a valid sample point number. More...
 
bool validSampleNo (int sampleNo) const
 Return true if a valid sample number. More...
 
const FunctionSpacegetFunctionSpace () const
 Return the function space associated with this Data object. More...
 
virtual void setTaggedValue (int tagKey, const DataTypes::ShapeType &pointshape, const DataTypes::ValueType &value, int dataOffset=0)
 setTaggedValue More...
 
virtual void copyToDataPoint (const int sampleNo, const int dataPointNo, const double value)
 Copy a double value to the data point dataPointNo of sample sampleNo in this object. More...
 
virtual void copyToDataPoint (const int sampleNo, const int dataPointNo, const WrappedArray &value)
 Copy the array object to the data point dataPointNo of sample sampleNo in this object. More...
 
virtual int getTagNumber (int dpno)
 Return the tag number associated with the given data-point number. More...
 
virtual void reorderByReferenceIDs (dim_t *reference_ids)
 reorders data sample ordered by reference_ids to the ordering of the functions space More...
 
unsigned int getNoValues () const
 Return the number of values in the shape for this object. More...
 
bool isLazy () const
 
virtual bool isExpanded () const
 
virtual bool actsExpanded () const
 Return true if this Data is expanded or resolves to expanded. That is, if it has a separate value for each datapoint in the sample. More...
 
virtual bool isTagged () const
 
bool isEmpty () const
 
void addOwner (Data *)
 
void removeOwner (Data *)
 
bool isShared () const
 Is this object owned by more than one Data object. More...
 

Private Types

typedef DataReady parent
 

Private Attributes

DataTypes::ValueType m_data
 

Additional Inherited Members

- Public Types inherited from escript::DataAbstract
typedef DataTypes::ValueType ValueType
 
typedef DataTypes::ShapeType ShapeType
 
- Protected Member Functions inherited from escript::DataAbstract
bool checkNoSharing () const
 Returns true if this object is not shared. For internal use only. - It may not be particularly fast. More...
 
void makeLazyShared ()
 Marks this DataAbstract shared as LazyData For internal use only. More...
 
- Protected Attributes inherited from escript::DataAbstract
std::vector< Data * > m_owners
 
bool m_lazyshared
 

Detailed Description

DataConstant stores a single data point which represents the entire function space.

Description: DataConstant stores a single data point which represents the entire function space.

Member Typedef Documentation

Constructor & Destructor Documentation

escript::DataConstant::DataConstant ( const WrappedArray value,
const FunctionSpace what 
)

Constructor for DataConstant objects.

Description: Constructor for DataConstant objects.

Parameters
value- Input - Data value for a single point.
what- Input - A description of what this data object represents.

References escript::DataVector::copyFromArray(), and m_data.

Referenced by deepCopy(), and getSlice().

escript::DataConstant::DataConstant ( const DataConstant other)

Copy constructor. Performs a deep copy.

References m_data.

escript::DataConstant::DataConstant ( const DataConstant other,
const DataTypes::RegionType region 
)

Alternative constructor for DataConstant objects.

Description: Alternative Constructor for DataConstant objects.

Parameters
other- Input - Data object to copy from.
region- Input - region to copy.

References escript::DataTypes::copySlice(), escript::DataAbstract::getNoValues(), escript::DataAbstract::getShape(), escript::DataTypes::getSliceRegionLoopRange(), getVectorRO(), m_data, and escript::DataVector::resize().

escript::DataConstant::DataConstant ( const FunctionSpace what,
const DataTypes::ShapeType shape,
const DataTypes::ValueType data 
)

Alternative constructor for DataConstant objects.

Description: Alternative Constructor for DataConstant objects.

Parameters
what- Input - A description of what this data object represents.
shape- Input - the shape of each data-point.
data- the data values for each data-point.

References m_data.

escript::DataConstant::DataConstant ( const FunctionSpace what,
const DataTypes::ShapeType shape,
const double  v 
)

Member Function Documentation

DataAbstract * escript::DataConstant::deepCopy ( )
virtual

Return a deep copy of the current object.

Implements escript::DataAbstract.

References DataConstant().

Referenced by isConstant().

void escript::DataConstant::dump ( const std::string  fileName) const
virtual
void escript::DataConstant::eigenvalues ( DataAbstract ev)
virtual

solves the eigenvalue problem this*V=ev*V for the eigenvalues ev

Parameters
ev- Output - eigenvalues in increasing order at each data point

Reimplemented from escript::DataAbstract.

References escript::DataMaths::eigenvalues(), escript::DataAbstract::getShape(), getVectorRW(), and m_data.

Referenced by isConstant().

void escript::DataConstant::eigenvalues_and_eigenvectors ( DataAbstract ev,
DataAbstract V,
const double  tol = 1.e-13 
)
virtual

solves the eigenvalue problem this*V=ev*V for the eigenvalues ev and eigenvectors V

Parameters
ev- Output - eigenvalues in increasing order at each data point
V- Output - corresponding eigenvectors. They are normalized such that their length is one and the first nonzero component is positive.
tol- Input - eigenvalue with relative distance tol are treated as equal.

Reimplemented from escript::DataAbstract.

References escript::DataMaths::eigenvalues_and_eigenvectors(), escript::DataAbstract::getShape(), getVectorRW(), m_data, and V.

Referenced by isConstant().

DataTypes::ValueType::size_type escript::DataConstant::getLength ( ) const
virtual

Return the number of doubles stored for the Data object.

Implements escript::DataAbstract.

References m_data, and escript::DataVector::size().

Referenced by isConstant().

DataTypes::ValueType::size_type escript::DataConstant::getPointOffset ( int  sampleNo,
int  dataPointNo 
) const
virtual

Return the offset for the given sample. This is a somewhat artificial notion but returns the offset in bytes for the given point into the container holding the point data. Only really necessary to avoid many DataArrayView objects.

Parameters
sampleNo- Input - sample number.
dataPointNo- Input - data point number for the sample.

Implements escript::DataAbstract.

Referenced by escript::C_GeneralTensorProduct(), escript::C_TensorBinaryOperation(), and isConstant().

DataTypes::ValueType::size_type escript::DataConstant::getPointOffset ( int  sampleNo,
int  dataPointNo 
)
virtual

Implements escript::DataAbstract.

DataAbstract * escript::DataConstant::getSlice ( const DataTypes::RegionType region) const
virtual

Factory method that returns a newly created DataConstant object sliced from the specified region of this object. The caller is reponsible for managing the object created.

Parameters
region- Input - region to slice from this object.

Implements escript::DataAbstract.

References DataConstant().

Referenced by isConstant().

const DataTypes::ValueType & escript::DataConstant::getVectorRO ( ) const
virtual
DataTypes::ValueType & escript::DataConstant::getVectorRW ( )
virtual
bool escript::DataConstant::hasNaN ( ) const
virtual

Return true if the value contains a NaN.

Implements escript::DataReady.

References m_data, escript::nancheck(), and escript::DataVector::size().

Referenced by isConstant().

bool escript::DataConstant::isConstant ( ) const
inlinevirtual
int escript::DataConstant::matrixInverse ( DataAbstract out) const
virtual

invert square matricies

Parameters
out- Where to store the results
Returns
errorcode (0 indicates success)

Reimplemented from escript::DataAbstract.

References escript::DataAbstract::getRank(), escript::DataAbstract::getShape(), getVectorRW(), m_data, and escript::DataMaths::matrix_inverse().

Referenced by isConstant().

void escript::DataConstant::nonsymmetric ( DataAbstract ev)
virtual

Computes a nonsymmetric matrix (A - AT) / 2.

Parameters
ev- Output - nonsymmetric matrix

Reimplemented from escript::DataAbstract.

References escript::DataAbstract::getShape(), getVectorRW(), m_data, and escript::DataMaths::nonsymmetric().

Referenced by isConstant().

void escript::DataConstant::replaceNaN ( double  value)
virtual

replaces all NaN values with value

Implements escript::DataReady.

References m_data, escript::nancheck(), and escript::DataVector::size().

Referenced by isConstant().

void escript::DataConstant::setSlice ( const DataAbstract value,
const DataTypes::RegionType region 
)
virtual
void escript::DataConstant::setToZero ( )
virtual

sets all values to zero

Reimplemented from escript::DataAbstract.

References CHECK_FOR_EX_WRITE, m_data, and escript::DataVector::size().

Referenced by isConstant().

void escript::DataConstant::swapaxes ( DataAbstract ev,
int  axis0,
int  axis1 
)
virtual

swaps components axis0 and axis1

Parameters
ev- Output - swapped components
axis0
axis1

Reimplemented from escript::DataAbstract.

References escript::DataAbstract::getShape(), getVectorRW(), m_data, and escript::DataMaths::swapaxes().

Referenced by isConstant().

void escript::DataConstant::symmetric ( DataAbstract ev)
virtual

Computes a symmetric matrix (A + AT) / 2.

Parameters
ev- Output - symmetric matrix

Reimplemented from escript::DataAbstract.

References escript::DataAbstract::getShape(), getVectorRW(), m_data, and escript::DataMaths::symmetric().

Referenced by isConstant().

string escript::DataConstant::toString ( ) const
virtual

Write the data as a string.

Implements escript::DataAbstract.

References escript::DataAbstract::getShape(), m_data, and escript::DataTypes::pointToString().

Referenced by isConstant().

void escript::DataConstant::trace ( DataAbstract ev,
int  axis_offset 
)
virtual

Computes the trace of a matrix.

Parameters
ev- Output - trace of matrix
axis_offset

Reimplemented from escript::DataAbstract.

References escript::DataAbstract::getShape(), getVectorRW(), m_data, and escript::DataMaths::trace().

Referenced by isConstant().

void escript::DataConstant::transpose ( DataAbstract ev,
int  axis_offset 
)
virtual

Transpose each data point of this Data object around the given axis.

Parameters
ev- Output - transpose of matrix
axis_offset

Reimplemented from escript::DataAbstract.

References escript::DataAbstract::getShape(), getVectorRW(), m_data, and escript::DataMaths::transpose().

Referenced by isConstant().

Member Data Documentation

DataTypes::ValueType escript::DataConstant::m_data
private

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