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Ifpack_Utils.h File Reference
#include "Ifpack_ConfigDefs.h"
#include "Epetra_Comm.h"
#include "unistd.h"
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Classes

class  Ifpack_Element
 

Functions

void Ifpack_PrintLine ()
 Prints a line of `=' on cout.
 
void Ifpack_BreakForDebugger (Epetra_Comm &Comm)
 Stops the execution of code, so that a debugger can be attached.
 
Epetra_CrsMatrix * Ifpack_CreateOverlappingCrsMatrix (const Epetra_RowMatrix *Matrix, const int OverlappingLevel)
 Creates an overlapping Epetra_CrsMatrix. Returns 0 if OverlappingLevel is 0.
 
Epetra_CrsGraph * Ifpack_CreateOverlappingCrsMatrix (const Epetra_CrsGraph *Graph, const int OverlappingLevel)
 Creates an overlapping Epetra_CrsGraph. Returns 0 if OverlappingLevel is 0.
 
string Ifpack_toString (const int &x)
 Convertes an integer to string.
 
string Ifpack_toString (const double &x)
 Convertes a double to string.
 
int Ifpack_PrintResidual (char *Label, const Epetra_RowMatrix &A, const Epetra_MultiVector &X, const Epetra_MultiVector &Y)
 Prints on cout the true residual.
 
int Ifpack_PrintResidual (const int iter, const Epetra_RowMatrix &A, const Epetra_MultiVector &X, const Epetra_MultiVector &Y)
 
void Ifpack_PrintSparsity_Simple (const Epetra_RowMatrix &A)
 
int Ifpack_Analyze (const Epetra_RowMatrix &A, const bool Cheap=false, const int NumPDEEqns=1)
 Analyzes the basic properties of the input matrix A; see Usage of Ifpack_Analyze()..
 
int Ifpack_AnalyzeMatrixElements (const Epetra_RowMatrix &A, const bool abs=false, const int steps=10)
 Analyzes the distribution of values of the input matrix A. More...
 
int Ifpack_AnalyzeVectorElements (const Epetra_Vector &Diagonal, const bool abs=false, const int steps=10)
 Analyzes the distribution of values of the input vector Diagonal. More...
 
Largely inspired from Yousef Saad's SPARSKIT plot function.

Plots the sparsity pattern of an Epetra_RowMatrix into a PS file.

Parameters
A(In) - Epetra_RowMatrix whose sparsity pattern will be plotted.
FileName(In) - char string containing the filename. If 0, then the matrix label is used as file name, after appending .ps.
NumPDEEqns(In) - number of PDE equations. The function will plot the block structure of the matrix if NumPDEEqns > 1
int Ifpack_PrintSparsity (const Epetra_RowMatrix &A, const char *FileName=0, const int NumPDEEqns=1)
 

Function Documentation

int Ifpack_AnalyzeMatrixElements ( const Epetra_RowMatrix &  A,
const bool  abs = false,
const int  steps = 10 
)

Analyzes the distribution of values of the input matrix A.

Parameters
A- (In) matrix to be analyzed.
abs- (In) if true, the function will analyze matrix B, whose elements are defined as \( B_{i,i} = | A_{i,i}| \).
steps- (In) number of intervals for the analysis.

An example of output is reported Usage of Ifpack_AnalyzeMatrixElements().

Definition at line 884 of file Ifpack_Utils.cpp.

References Ifpack_PrintLine().

int Ifpack_AnalyzeVectorElements ( const Epetra_Vector &  Diagonal,
const bool  abs = false,
const int  steps = 10 
)

Analyzes the distribution of values of the input vector Diagonal.

Parameters
Diagonal- (In) Vector to be analyzed.
abs- (In) if true, the function will analyze vector B, whose elements are defined as \( B_{i} = | D_{i}| \).
steps- (In) number of intervals for the analysis.

An example of output is reported Usage of Ifpack_AnalyzeVectorElements().

Definition at line 827 of file Ifpack_Utils.cpp.

References Ifpack_PrintLine().