Epetra  Development
 All Classes Namespaces Files Functions Variables Enumerations Enumerator Pages
List of all members
Epetra_Vector Class Reference

Epetra_Vector: A class for constructing and using dense vectors on a parallel computer. More...

#include <Epetra_Vector.h>

Inheritance diagram for Epetra_Vector:
Inheritance graph
[legend]
Collaboration diagram for Epetra_Vector:
Collaboration graph
[legend]

Public Member Functions

Constructors/destructors
 Epetra_Vector (const Epetra_BlockMap &Map, bool zeroOut=true)
 Basic Epetra_Vector constuctor. More...
 
 Epetra_Vector (const Epetra_Vector &Source)
 Epetra_Vector copy constructor.
 
 Epetra_Vector (Epetra_DataAccess CV, const Epetra_BlockMap &Map, double *V)
 Set vector values from user array. More...
 
 Epetra_Vector (Epetra_DataAccess CV, const Epetra_MultiVector &Source, int Index)
 Set vector values from a vector in an existing Epetra_MultiVector. More...
 
virtual ~Epetra_Vector ()
 Epetra_Vector destructor.
 
Post-construction modification routines
int ReplaceGlobalValues (int NumEntries, const double *Values, const int *Indices)
 Replace values in a vector with a given indexed list of values, indices are in global index space. More...
 
int ReplaceGlobalValues (int NumEntries, const double *Values, const long long *Indices)
 
int ReplaceMyValues (int NumEntries, const double *Values, const int *Indices)
 Replace values in a vector with a given indexed list of values, indices are in local index space. More...
 
int SumIntoGlobalValues (int NumEntries, const double *Values, const int *Indices)
 Sum values into a vector with a given indexed list of values, indices are in global index space. More...
 
int SumIntoMyValues (int NumEntries, const double *Values, const int *Indices)
 Sum values into a vector with a given indexed list of values, indices are in local index space. More...
 
int ReplaceGlobalValues (int NumEntries, int BlockOffset, const double *Values, const int *Indices)
 Replace values in a vector with a given indexed list of values at the specified BlockOffset, indices are in global index space. More...
 
int ReplaceMyValues (int NumEntries, int BlockOffset, const double *Values, const int *Indices)
 Replace values in a vector with a given indexed list of values at the specified BlockOffset, indices are in local index space. More...
 
int SumIntoGlobalValues (int NumEntries, int BlockOffset, const double *Values, const int *Indices)
 Sum values into a vector with a given indexed list of values at the specified BlockOffset, indices are in global index space. More...
 
int SumIntoMyValues (int NumEntries, int BlockOffset, const double *Values, const int *Indices)
 Sum values into a vector with a given indexed list of values at the specified BlockOffset, indices are in local index space. More...
 
Extraction methods
int ExtractCopy (double *V) const
 Put vector values into user-provided array. More...
 
int ExtractView (double **V) const
 Set user-provided address of V. More...
 
Overloaded operators
double & operator[] (int index)
 Element access function. More...
 
const double & operator[] (int index) const
 Element access function. More...
 
Expert-only unsupported methods
int ResetView (double *Values_in)
 Reset the view of an existing vector to point to new user data. More...
 
- Public Member Functions inherited from Epetra_MultiVector
int ReplaceMap (const Epetra_BlockMap &map)
 
int Reduce ()
 
 Epetra_MultiVector (const Epetra_BlockMap &Map, int NumVectors, bool zeroOut=true)
 Basic Epetra_MultiVector constuctor. More...
 
 Epetra_MultiVector (const Epetra_MultiVector &Source)
 Epetra_MultiVector copy constructor.
 
 Epetra_MultiVector (Epetra_DataAccess CV, const Epetra_BlockMap &Map, double *A, int MyLDA, int NumVectors)
 Set multi-vector values from two-dimensional array. More...
 
 Epetra_MultiVector (Epetra_DataAccess CV, const Epetra_BlockMap &Map, double **ArrayOfPointers, int NumVectors)
 Set multi-vector values from array of pointers. More...
 
 Epetra_MultiVector (Epetra_DataAccess CV, const Epetra_MultiVector &Source, int *Indices, int NumVectors)
 Set multi-vector values from list of vectors in an existing Epetra_MultiVector. More...
 
 Epetra_MultiVector (Epetra_DataAccess CV, const Epetra_MultiVector &Source, int StartIndex, int NumVectors)
 Set multi-vector values from range of vectors in an existing Epetra_MultiVector. More...
 
virtual ~Epetra_MultiVector ()
 Epetra_MultiVector destructor.
 
int ReplaceGlobalValue (int GlobalRow, int VectorIndex, double ScalarValue)
 Replace current value at the specified (GlobalRow, VectorIndex) location with ScalarValue. More...
 
int ReplaceGlobalValue (long long GlobalRow, int VectorIndex, double ScalarValue)
 
int ReplaceGlobalValue (int GlobalBlockRow, int BlockRowOffset, int VectorIndex, double ScalarValue)
 Replace current value at the specified (GlobalBlockRow, BlockRowOffset, VectorIndex) location with ScalarValue. More...
 
int ReplaceGlobalValue (long long GlobalBlockRow, int BlockRowOffset, int VectorIndex, double ScalarValue)
 
int SumIntoGlobalValue (int GlobalRow, int VectorIndex, double ScalarValue)
 Adds ScalarValue to existing value at the specified (GlobalRow, VectorIndex) location. More...
 
int SumIntoGlobalValue (long long GlobalRow, int VectorIndex, double ScalarValue)
 
int SumIntoGlobalValue (int GlobalBlockRow, int BlockRowOffset, int VectorIndex, double ScalarValue)
 Adds ScalarValue to existing value at the specified (GlobalBlockRow, BlockRowOffset, VectorIndex) location. More...
 
int SumIntoGlobalValue (long long GlobalBlockRow, int BlockRowOffset, int VectorIndex, double ScalarValue)
 
int ReplaceMyValue (int MyRow, int VectorIndex, double ScalarValue)
 Replace current value at the specified (MyRow, VectorIndex) location with ScalarValue. More...
 
int ReplaceMyValue (int MyBlockRow, int BlockRowOffset, int VectorIndex, double ScalarValue)
 Replace current value at the specified (MyBlockRow, BlockRowOffset, VectorIndex) location with ScalarValue. More...
 
int SumIntoMyValue (int MyRow, int VectorIndex, double ScalarValue)
 Adds ScalarValue to existing value at the specified (MyRow, VectorIndex) location. More...
 
int SumIntoMyValue (int MyBlockRow, int BlockRowOffset, int VectorIndex, double ScalarValue)
 Adds ScalarValue to existing value at the specified (MyBlockRow, BlockRowOffset, VectorIndex) location. More...
 
int PutScalar (double ScalarConstant)
 Initialize all values in a multi-vector with constant value. More...
 
int Random ()
 Set multi-vector values to random numbers. More...
 
int ExtractCopy (double *A, int MyLDA) const
 Put multi-vector values into user-provided two-dimensional array. More...
 
int ExtractCopy (double **ArrayOfPointers) const
 Put multi-vector values into user-provided array of pointers. More...
 
int ExtractView (double **A, int *MyLDA) const
 Set user-provided addresses of A and MyLDA. More...
 
int ExtractView (double ***ArrayOfPointers) const
 Set user-provided addresses of ArrayOfPointers. More...
 
int Dot (const Epetra_MultiVector &A, double *Result) const
 Computes dot product of each corresponding pair of vectors. More...
 
int Abs (const Epetra_MultiVector &A)
 Puts element-wise absolute values of input Multi-vector in target. More...
 
int Reciprocal (const Epetra_MultiVector &A)
 Puts element-wise reciprocal values of input Multi-vector in target. More...
 
int Scale (double ScalarValue)
 Scale the current values of a multi-vector, this = ScalarValue*this. More...
 
int Scale (double ScalarA, const Epetra_MultiVector &A)
 Replace multi-vector values with scaled values of A, this = ScalarA*A. More...
 
int Update (double ScalarA, const Epetra_MultiVector &A, double ScalarThis)
 Update multi-vector values with scaled values of A, this = ScalarThis*this + ScalarA*A. More...
 
int Update (double ScalarA, const Epetra_MultiVector &A, double ScalarB, const Epetra_MultiVector &B, double ScalarThis)
 Update multi-vector with scaled values of A and B, this = ScalarThis*this + ScalarA*A + ScalarB*B. More...
 
int Norm1 (double *Result) const
 Compute 1-norm of each vector in multi-vector. More...
 
int Norm2 (double *Result) const
 Compute 2-norm of each vector in multi-vector. More...
 
int NormInf (double *Result) const
 Compute Inf-norm of each vector in multi-vector. More...
 
int NormWeighted (const Epetra_MultiVector &Weights, double *Result) const
 Compute Weighted 2-norm (RMS Norm) of each vector in multi-vector. More...
 
int MinValue (double *Result) const
 Compute minimum value of each vector in multi-vector. More...
 
int MaxValue (double *Result) const
 Compute maximum value of each vector in multi-vector. More...
 
int MeanValue (double *Result) const
 Compute mean (average) value of each vector in multi-vector. More...
 
int Multiply (char TransA, char TransB, double ScalarAB, const Epetra_MultiVector &A, const Epetra_MultiVector &B, double ScalarThis)
 Matrix-Matrix multiplication, this = ScalarThis*this + ScalarAB*A*B. More...
 
int Multiply (double ScalarAB, const Epetra_MultiVector &A, const Epetra_MultiVector &B, double ScalarThis)
 Multiply a Epetra_MultiVector with another, element-by-element. More...
 
int ReciprocalMultiply (double ScalarAB, const Epetra_MultiVector &A, const Epetra_MultiVector &B, double ScalarThis)
 Multiply a Epetra_MultiVector by the reciprocal of another, element-by-element. More...
 
int SetSeed (unsigned int Seed_in)
 Set seed for Random function. More...
 
unsigned int Seed ()
 Get seed from Random function. More...
 
Epetra_MultiVectoroperator= (const Epetra_MultiVector &Source)
 = Operator. More...
 
double *& operator[] (int i)
 Vector access function. More...
 
double *const & operator[] (int i) const
 Vector access function. More...
 
Epetra_Vector *& operator() (int i)
 Vector access function. More...
 
const Epetra_Vector *& operator() (int i) const
 Vector access function. More...
 
int NumVectors () const
 Returns the number of vectors in the multi-vector.
 
int MyLength () const
 Returns the local vector length on the calling processor of vectors in the multi-vector.
 
int GlobalLength () const
 Returns the global vector length of vectors in the multi-vector.
 
long long GlobalLength64 () const
 
int Stride () const
 Returns the stride between vectors in the multi-vector (only meaningful if ConstantStride() is true).
 
bool ConstantStride () const
 Returns true if this multi-vector has constant stride between vectors.
 
virtual void Print (std::ostream &os) const
 Print method.
 
int ResetView (double **ArrayOfPointers)
 Reset the view of an existing multivector to point to new user data. More...
 
double * Values () const
 Get pointer to MultiVector values.
 
double ** Pointers () const
 Get pointer to individual vector pointers.
 
- Public Member Functions inherited from Epetra_DistObject
 Epetra_DistObject (const Epetra_BlockMap &Map)
 Basic Epetra_DistObject constuctor. More...
 
 Epetra_DistObject (const Epetra_BlockMap &Map, const char *const Label)
 
 Epetra_DistObject (const Epetra_DistObject &Source)
 Epetra_DistObject copy constructor.
 
virtual ~Epetra_DistObject ()
 Epetra_DistObject destructor.
 
int Import (const Epetra_SrcDistObject &A, const Epetra_Import &Importer, Epetra_CombineMode CombineMode, const Epetra_OffsetIndex *Indexor=0)
 Imports an Epetra_DistObject using the Epetra_Import object. More...
 
int Import (const Epetra_SrcDistObject &A, const Epetra_Export &Exporter, Epetra_CombineMode CombineMode, const Epetra_OffsetIndex *Indexor=0)
 Imports an Epetra_DistObject using the Epetra_Export object. More...
 
int Export (const Epetra_SrcDistObject &A, const Epetra_Import &Importer, Epetra_CombineMode CombineMode, const Epetra_OffsetIndex *Indexor=0)
 Exports an Epetra_DistObject using the Epetra_Import object. More...
 
int Export (const Epetra_SrcDistObject &A, const Epetra_Export &Exporter, Epetra_CombineMode CombineMode, const Epetra_OffsetIndex *Indexor=0)
 Exports an Epetra_DistObject using the Epetra_Export object. More...
 
const Epetra_BlockMapMap () const
 Returns the address of the Epetra_BlockMap for this multi-vector.
 
const Epetra_CommComm () const
 Returns the address of the Epetra_Comm for this multi-vector.
 
bool DistributedGlobal () const
 Returns true if this multi-vector is distributed global, i.e., not local replicated.
 
- Public Member Functions inherited from Epetra_Object
 Epetra_Object (int TracebackModeIn=-1, bool set_label=true)
 Epetra_Object Constructor. More...
 
 Epetra_Object (const char *const Label, int TracebackModeIn=-1)
 Epetra_Object Constructor. More...
 
 Epetra_Object (const Epetra_Object &Object)
 Epetra_Object Copy Constructor. More...
 
virtual ~Epetra_Object ()
 Epetra_Object Destructor. More...
 
virtual int ReportError (const std::string Message, int ErrorCode) const
 Error reporting method.
 
virtual void SetLabel (const char *const Label)
 Epetra_Object Label definition using char *. More...
 
virtual const char * Label () const
 Epetra_Object Label access funtion. More...
 
- Public Member Functions inherited from Epetra_SrcDistObject
virtual ~Epetra_SrcDistObject ()
 Epetra_SrcDistObject destructor.
 
- Public Member Functions inherited from Epetra_CompObject
Epetra_CompObjectoperator= (const Epetra_CompObject &src)
 
 Epetra_CompObject ()
 Basic Epetra_CompObject constuctor.
 
 Epetra_CompObject (const Epetra_CompObject &Source)
 Epetra_CompObject copy constructor.
 
virtual ~Epetra_CompObject ()
 Epetra_CompObject destructor.
 
void SetFlopCounter (const Epetra_Flops &FlopCounter_in)
 Set the internal Epetra_Flops() pointer.
 
void SetFlopCounter (const Epetra_CompObject &CompObject)
 Set the internal Epetra_Flops() pointer to the flop counter of another Epetra_CompObject.
 
void UnsetFlopCounter ()
 Set the internal Epetra_Flops() pointer to 0 (no flops counted).
 
Epetra_FlopsGetFlopCounter () const
 Get the pointer to the Epetra_Flops() object associated with this object, returns 0 if none.
 
void ResetFlops () const
 Resets the number of floating point operations to zero for this multi-vector.
 
double Flops () const
 Returns the number of floating point operations with this multi-vector.
 
void UpdateFlops (int Flops_in) const
 Increment Flop count for this object.
 
void UpdateFlops (long int Flops_in) const
 Increment Flop count for this object.
 
void UpdateFlops (long long Flops_in) const
 Increment Flop count for this object.
 
void UpdateFlops (double Flops_in) const
 Increment Flop count for this object.
 
void UpdateFlops (float Flops_in) const
 Increment Flop count for this object.
 
- Public Member Functions inherited from Epetra_BLAS
 Epetra_BLAS (void)
 Epetra_BLAS Constructor. More...
 
 Epetra_BLAS (const Epetra_BLAS &BLAS)
 Epetra_BLAS Copy Constructor. More...
 
virtual ~Epetra_BLAS (void)
 Epetra_BLAS Destructor.
 
float ASUM (const int N, const float *X, const int INCX=1) const
 Epetra_BLAS one norm function (SASUM).
 
double ASUM (const int N, const double *X, const int INCX=1) const
 Epetra_BLAS one norm function (DASUM).
 
float DOT (const int N, const float *X, const float *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS dot product function (SDOT).
 
double DOT (const int N, const double *X, const double *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS dot product function (DDOT).
 
float NRM2 (const int N, const float *X, const int INCX=1) const
 Epetra_BLAS norm function (SNRM2).
 
double NRM2 (const int N, const double *X, const int INCX=1) const
 Epetra_BLAS norm function (DNRM2).
 
void SCAL (const int N, const float ALPHA, float *X, const int INCX=1) const
 Epetra_BLAS vector scale function (SSCAL)
 
void SCAL (const int N, const double ALPHA, double *X, const int INCX=1) const
 Epetra_BLAS vector scale function (DSCAL)
 
void COPY (const int N, const float *X, float *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS vector copy function (SCOPY)
 
void COPY (const int N, const double *X, double *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS vector scale function (DCOPY)
 
int IAMAX (const int N, const float *X, const int INCX=1) const
 Epetra_BLAS arg maximum of absolute value function (ISAMAX)
 
int IAMAX (const int N, const double *X, const int INCX=1) const
 Epetra_BLAS arg maximum of absolute value function (IDAMAX)
 
void AXPY (const int N, const float ALPHA, const float *X, float *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS vector update function (SAXPY)
 
void AXPY (const int N, const double ALPHA, const double *X, double *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS vector update function (DAXPY)
 
void GEMV (const char TRANS, const int M, const int N, const float ALPHA, const float *A, const int LDA, const float *X, const float BETA, float *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS matrix-vector multiply function (SGEMV)
 
void GEMV (const char TRANS, const int M, const int N, const double ALPHA, const double *A, const int LDA, const double *X, const double BETA, double *Y, const int INCX=1, const int INCY=1) const
 Epetra_BLAS matrix-vector multiply function (DGEMV)
 
void GEMM (const char TRANSA, const char TRANSB, const int M, const int N, const int K, const float ALPHA, const float *A, const int LDA, const float *B, const int LDB, const float BETA, float *C, const int LDC) const
 Epetra_BLAS matrix-matrix multiply function (SGEMM)
 
void GEMM (const char TRANSA, const char TRANSB, const int M, const int N, const int K, const double ALPHA, const double *A, const int LDA, const double *B, const int LDB, const double BETA, double *C, const int LDC) const
 Epetra_BLAS matrix-matrix multiply function (DGEMM)
 
void SYMM (const char SIDE, const char UPLO, const int M, const int N, const float ALPHA, const float *A, const int LDA, const float *B, const int LDB, const float BETA, float *C, const int LDC) const
 Epetra_BLAS symmetric matrix-matrix multiply function (SSYMM)
 
void SYMM (const char SIDE, const char UPLO, const int M, const int N, const double ALPHA, const double *A, const int LDA, const double *B, const int LDB, const double BETA, double *C, const int LDC) const
 Epetra_BLAS matrix-matrix multiply function (DSYMM)
 
void TRMM (const char SIDE, const char UPLO, const char TRANSA, const char DIAG, const int M, const int N, const float ALPHA, const float *A, const int LDA, float *B, const int LDB) const
 Epetra_BLAS triangular matrix-matrix multiply function (STRMM)
 
void TRMM (const char SIDE, const char UPLO, const char TRANSA, const char DIAG, const int M, const int N, const double ALPHA, const double *A, const int LDA, double *B, const int LDB) const
 Epetra_BLAS triangular matrix-matrix multiply function (DTRMM)
 
void SYRK (const char UPLO, const char TRANS, const int N, const int K, const float ALPHA, const float *A, const int LDA, const float BETA, float *C, const int LDC) const
 Eperta_BLAS symetric rank k funtion (ssyrk)
 
void SYRK (const char UPLO, const char TRANS, const int N, const int K, const double ALPHA, const double *A, const int LDA, const double BETA, double *C, const int LDC) const
 Eperta_BLAS symetric rank k funtion (dsyrk)
 

Additional Inherited Members

- Static Public Member Functions inherited from Epetra_Object
static void SetTracebackMode (int TracebackModeValue)
 Set the value of the Epetra_Object error traceback report mode. More...
 
static int GetTracebackMode ()
 Get the value of the Epetra_Object error report mode.
 
static std::ostream & GetTracebackStream ()
 Get the output stream for error reporting.
 
- Static Public Attributes inherited from Epetra_Object
static int TracebackMode
 
- Protected Member Functions inherited from Epetra_MultiVector
void Assign (const Epetra_MultiVector &rhs)
 
int CheckInput ()
 
- Protected Member Functions inherited from Epetra_DistObject
virtual int DoTransfer (const Epetra_SrcDistObject &A, Epetra_CombineMode CombineMode, int NumSameIDs, int NumPermuteIDs, int NumRemoteIDs, int NumExportIDs, int *PermuteToLIDs, int *PermuteFromLIDs, int *RemoteLIDs, int *ExportLIDs, int &LenExports, char *&Exports, int &LenImports, char *&Imports, Epetra_Distributor &Distor, bool DoReverse, const Epetra_OffsetIndex *Indexor)
 Perform actual transfer (redistribution) of data across memory images, using Epetra_Distributor object.
 
- Protected Member Functions inherited from Epetra_Object
std::string toString (const int &x) const
 
std::string toString (const long long &x) const
 
std::string toString (const double &x) const
 
- Protected Attributes inherited from Epetra_MultiVector
double * Values_
 
- Protected Attributes inherited from Epetra_DistObject
Epetra_BlockMap Map_
 
const Epetra_CommComm_
 
char * Exports_
 
char * Imports_
 
int LenExports_
 
int LenImports_
 
int * Sizes_
 
- Protected Attributes inherited from Epetra_CompObject
Epetra_FlopsFlopCounter_
 

Detailed Description

Epetra_Vector: A class for constructing and using dense vectors on a parallel computer.

The Epetra_Vector class enables the construction and use of real-valued, double-precision dense vectors in a distributed memory environment. The distribution of the dense vector is determined in part by a Epetra_Comm object and a Epetra_Map (or Epetra_LocalMap or Epetra_BlockMap).

This class is derived from the Epetra_MultiVector class. As such, it has full access to all of the functionality provided in the Epetra_MultiVector class.

Distributed Global vs. Replicated Local

Constructing Epetra_Vectors

There are four Epetra_Vector constructors. The first is a basic constructor that allocates space and sets all values to zero, the second is a copy constructor. The third and fourth constructors work with user data. These constructors have two data access modes:

  1. Copy mode - Allocates memory and makes a copy of the user-provided data. In this case, the user data is not needed after construction.
  2. View mode - Creates a "view" of the user data. In this case, the user data is required to remain intact for the life of the vector.
Warning
View mode is extremely dangerous from a data hiding perspective. Therefore, we strongly encourage users to develop code using Copy mode first and only use the View mode in a secondary optimization phase.

All Epetra_Vector constructors require a map argument that describes the layout of elements on the parallel machine. Specifically, map is a Epetra_Map, Epetra_LocalMap or Epetra_BlockMap object describing the desired memory layout for the vector.

There are four different Epetra_Vector constructors:

Extracting Data from Epetra_Vectors

Once a Epetra_Vector is constructed, it is possible to extract a copy of the values or create a view of them.

Warning
ExtractView functions are extremely dangerous from a data hiding perspective. For both ExtractView fuctions, there is a corresponding ExtractCopy function. We strongly encourage users to develop code using ExtractCopy functions first and only use the ExtractView functions in a secondary optimization phase.

There are two Extract functions:

Vector and Utility Functions

Once a Epetra_Vector is constructed, a variety of mathematical functions can be applied to the vector. Specifically:

The final useful function is Flops(). Each Epetra_Vector object keep track of the number of serial floating point operations performed using the specified object as the this argument to the function. The Flops() function returns this number as a double precision number. Using this information, in conjunction with the Epetra_Time class, one can get accurate parallel performance numbers.

Warning
A Epetra_Map, Epetra_LocalMap or Epetra_BlockMap object is required for all Epetra_Vector constructors.

Constructor & Destructor Documentation

Epetra_Vector::Epetra_Vector ( const Epetra_BlockMap Map,
bool  zeroOut = true 
)

Basic Epetra_Vector constuctor.

Creates a Epetra_Vector object and fills with zero values.

Parameters
InMap - A Epetra_LocalMap, Epetra_Map or Epetra_BlockMap.
InzeroOut - If true then the allocated memory will be zeroed out initialy. If false then this memory will not be touched which can be significantly faster.
Warning
Note that, because Epetra_LocalMap derives from Epetra_Map and Epetra_Map derives from Epetra_BlockMap, this constructor works for all three types of Epetra map classes.
Returns
Pointer to a Epetra_Vector.
Epetra_Vector::Epetra_Vector ( Epetra_DataAccess  CV,
const Epetra_BlockMap Map,
double *  V 
)

Set vector values from user array.

Parameters
InEpetra_DataAccess - Enumerated type set to Copy or View.
InMap - A Epetra_LocalMap, Epetra_Map or Epetra_BlockMap.
InV - Pointer to an array of double precision numbers..
Returns
Integer error code, set to 0 if successful.

See Detailed Description section for further discussion.

Epetra_Vector::Epetra_Vector ( Epetra_DataAccess  CV,
const Epetra_MultiVector Source,
int  Index 
)

Set vector values from a vector in an existing Epetra_MultiVector.

Parameters
InEpetra_DataAccess - Enumerated type set to Copy or View.
InMap - A Epetra_LocalMap, Epetra_Map or Epetra_BlockMap.
InSource - An existing fully constructed Epetra_MultiVector.
InIndex - Index of vector to access.
Returns
Integer error code, set to 0 if successful.

See Detailed Description section for further discussion.

Member Function Documentation

int Epetra_Vector::ExtractCopy ( double *  V) const

Put vector values into user-provided array.

Parameters
OutV - Pointer to memory space that will contain the vector values.
Returns
Integer error code, set to 0 if successful.
int Epetra_Vector::ExtractView ( double **  V) const

Set user-provided address of V.

Parameters
OutV - Address of a pointer to that will be set to point to the values of the vector.
Returns
Integer error code, set to 0 if successful.
double& Epetra_Vector::operator[] ( int  index)
inline

Element access function.

Returns
V[Index].

References Epetra_MultiVector::MyLength().

const double& Epetra_Vector::operator[] ( int  index) const
inline

Element access function.

Returns
V[Index].

References Epetra_MultiVector::MyLength().

int Epetra_Vector::ReplaceGlobalValues ( int  NumEntries,
const double *  Values,
const int *  Indices 
)

Replace values in a vector with a given indexed list of values, indices are in global index space.

Replace the Indices[i] entry in the this object with Values[i], for i=0; i<NumEntries. The indices are in global index space.

Parameters
InNumEntries - Number of vector entries to modify.
InValues - Values which will replace existing values in vector, of length NumEntries.
InIndices - Indices in global index space corresponding to Values.
Returns
Integer error code, set to 0 if successful, set to 1 if one or more indices are not associated with calling processor.
int Epetra_Vector::ReplaceGlobalValues ( int  NumEntries,
int  BlockOffset,
const double *  Values,
const int *  Indices 
)

Replace values in a vector with a given indexed list of values at the specified BlockOffset, indices are in global index space.

Replace the Indices[i] entry in the this object with Values[i], for i=0; i<NumEntries. The indices are in global index space. This method is intended for vector that are defined using block maps. In this situation, an index value is associated with one or more vector entries, depending on the element size of the given index. The BlockOffset argument indicates which vector entry to modify as an offset from the first vector entry associated with the given index. The offset is used for each entry in the input list.

Parameters
InNumEntries - Number of vector entries to modify.
InBlockOffset - Offset from the first vector entry associated with each of the given indices.
InValues - Values which will replace existing values in vector, of length NumEntries.
InIndices - Indices in global index space corresponding to Values.
Returns
Integer error code, set to 0 if successful, set to 1 if one or more indices are not associated with calling processor.
int Epetra_Vector::ReplaceMyValues ( int  NumEntries,
const double *  Values,
const int *  Indices 
)

Replace values in a vector with a given indexed list of values, indices are in local index space.

Replace the Indices[i] entry in the this object with Values[i], for i=0; i<NumEntries. The indices are in local index space.

Parameters
InNumEntries - Number of vector entries to modify.
InValues - Values which will replace existing values in vector, of length NumEntries.
InIndices - Indices in local index space corresponding to Values.
Returns
Integer error code, set to 0 if successful, set to 1 if one or more indices are not associated with calling processor.
int Epetra_Vector::ReplaceMyValues ( int  NumEntries,
int  BlockOffset,
const double *  Values,
const int *  Indices 
)

Replace values in a vector with a given indexed list of values at the specified BlockOffset, indices are in local index space.

Replace the (Indices[i], BlockOffset) entry in the this object with Values[i], for i=0; i<NumEntries. The indices are in local index space. This method is intended for vector that are defined using block maps. In this situation, an index value is associated with one or more vector entries, depending on the element size of the given index. The BlockOffset argument indicates which vector entry to modify as an offset from the first vector entry associated with the given index. The offset is used for each entry in the input list.

Parameters
InNumEntries - Number of vector entries to modify.
InBlockOffset - Offset from the first vector entry associated with each of the given indices.
InValues - Values which will replace existing values in vector, of length NumEntries.
InIndices - Indices in local index space corresponding to Values.
Returns
Integer error code, set to 0 if successful, set to 1 if one or more indices are not associated with calling processor.
int Epetra_Vector::ResetView ( double *  Values_in)
inline

Reset the view of an existing vector to point to new user data.

Allows the (very) light-weight replacement of multivector values for an existing vector that was constructed using an Epetra_DataAccess mode of View. No checking is performed to see if the values passed in contain valid data. It is assumed that the user has verified the integrity of data before calling this method. This method is useful for situations where a vector is needed for use with an Epetra operator or matrix and the user is not passing in a multivector, or the multivector is being passed in with another map that is not exactly compatible with the operator, but has the correct number of entries.

This method is used by AztecOO and Ifpack in the matvec and solve methods to improve performance and reduce repeated calls to constructors and destructors.

Parameters
ValuesVector data.
Returns
Integer error code, set to 0 if successful, -1 if the multivector was not created as a View.
Warning
This method is extremely dangerous and should only be used by experts.

References Epetra_MultiVector::ResetView().

int Epetra_Vector::SumIntoGlobalValues ( int  NumEntries,
const double *  Values,
const int *  Indices 
)

Sum values into a vector with a given indexed list of values, indices are in global index space.

Sum Values[i] into the Indices[i] entry in the this object, for i=0; i<NumEntries. The indices are in global index space.

Parameters
InNumEntries - Number of vector entries to modify.
InValues - Values which will replace existing values in vector, of length NumEntries.
InIndices - Indices in global index space corresponding to Values.
Returns
Integer error code, set to 0 if successful, set to 1 if one or more indices are not associated with calling processor.
int Epetra_Vector::SumIntoGlobalValues ( int  NumEntries,
int  BlockOffset,
const double *  Values,
const int *  Indices 
)

Sum values into a vector with a given indexed list of values at the specified BlockOffset, indices are in global index space.

Sum Values[i] into the Indices[i] entry in the this object, for i=0; i<NumEntries. The indices are in global index space. This method is intended for vector that are defined using block maps. In this situation, an index value is associated with one or more vector entries, depending on the element size of the given index. The BlockOffset argument indicates which vector entry to modify as an offset from the first vector entry associated with the given index. The offset is used for each entry in the input list.

Parameters
InNumEntries - Number of vector entries to modify.
InBlockOffset - Offset from the first vector entry associated with each of the given indices.
InValues - Values which will replace existing values in vector, of length NumEntries.
InIndices - Indices in global index space corresponding to Values.
Returns
Integer error code, set to 0 if successful, set to 1 if one or more indices are not associated with calling processor.
int Epetra_Vector::SumIntoMyValues ( int  NumEntries,
const double *  Values,
const int *  Indices 
)

Sum values into a vector with a given indexed list of values, indices are in local index space.

Sum Values[i] into the Indices[i] entry in the this object, for i=0; i<NumEntries. The indices are in local index space.

Parameters
InNumEntries - Number of vector entries to modify.
InValues - Values which will replace existing values in vector, of length NumEntries.
InIndices - Indices in local index space corresponding to Values.
Returns
Integer error code, set to 0 if successful, set to 1 if one or more indices are not associated with calling processor.
int Epetra_Vector::SumIntoMyValues ( int  NumEntries,
int  BlockOffset,
const double *  Values,
const int *  Indices 
)

Sum values into a vector with a given indexed list of values at the specified BlockOffset, indices are in local index space.

Sum Values[i] into the Indices[i] entry in the this object, for i=0; i<NumEntries. The indices are in local index space. This method is intended for vector that are defined using block maps. In this situation, an index value is associated with one or more vector entries, depending on the element size of the given index. The BlockOffset argument indicates which vector entry to modify as an offset from the first vector entry associated with the given index. The offset is used for each entry in the input list.

Parameters
InNumEntries - Number of vector entries to modify.
InBlockOffset - Offset from the first vector entry associated with each of the given indices.
InValues - Values which will replace existing values in vector, of length NumEntries.
InIndices - Indices in local index space corresponding to Values.
Returns
Integer error code, set to 0 if successful, set to 1 if one or more indices are not associated with calling processor.

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