44#include "Teuchos_ParameterList.hpp"
45#include "Teuchos_RefCountPtr.hpp"
46#include "Epetra_MultiVector.h"
48#include "Epetra_RowMatrix.h"
64 RootNode_(
RHS.RootNode()),
65 NumMyRows_(
RHS.NumMyRows()),
66 IsComputed_(
RHS.IsComputed())
103 if (Name ==
"reorder: root node")
154 std::vector<int> tmp;
158 int Length =
Graph.MaxMyNumEntries();
159 std::vector<int> Indices(Length);
168 std::vector<int> tmp2;
172 for (
int i = 0 ; i < (int)tmp.size() ; ++i) {
175 NumEntries, &Indices[0]));
178 std::sort(Indices.begin(), Indices.begin() + Length);
180 for (
int j = 0 ; j < NumEntries ; ++j) {
181 int col = Indices[j];
199 if ((tmp2.size() == 0) && (count != -1)) {
270 X[j][np] = Xorig[j][i];
286 X[j][i] = Xorig[j][np];
298 os <<
"*** Ifpack_RCMReordering" << endl << endl;
300 os <<
"*** Reordering not yet computed." << endl;
302 os <<
"*** Number of local rows = " <<
NumMyRows_ << endl;
303 os <<
"*** Root node = " <<
RootNode_ << endl;
305 os <<
"Local Row\tReorder[i]\tInvReorder[i]" << endl;
#define IFPACK_CHK_ERR(ifpack_err)
adjacency_list< vecS, vecS, undirectedS, no_property, property< edge_weight_t, double > > Graph
Ifpack_Graph_Epetra_RowMatrix: a class to define Ifpack_Graph as a light-weight conversion of Epetra_...
Ifpack_Graph: a pure virtual class that defines graphs for IFPACK.
Ifpack_RCMReordering: reverse Cuthill-McKee reordering.
virtual std::ostream & Print(std::ostream &os) const
Prints basic information on iostream. This function is used by operator<<.
virtual int Pinv(const Epetra_MultiVector &Xorig, Epetra_MultiVector &Xinvreord) const
Applies inverse reordering to multivector X, whose local length equals the number of local rows.
virtual int SetParameters(Teuchos::ParameterList &List)
Sets all parameters.
int RootNode_
Defines the root node (defaulted to 0).
virtual int NumMyRows() const
Returns the number of local rows.
virtual int SetParameter(const std::string Name, const int Value)
Sets integer parameters ‘Name’.
virtual bool IsComputed() const
Returns true is the reordering object has been successfully initialized, false otherwise.
Ifpack_RCMReordering & operator=(const Ifpack_RCMReordering &RHS)
Assignment operator.
std::vector< int > Reorder_
Contains the reordering.
virtual int InvReorder(const int i) const
Returns the inverse reordered index of row i.
Ifpack_RCMReordering()
Constructor for Ifpack_Graph's.
bool IsComputed_
If true, the reordering has been successfully computed.
virtual int Reorder(const int i) const
Returns the reordered index of row i.
virtual int P(const Epetra_MultiVector &Xorig, Epetra_MultiVector &Xreord) const
Applies reordering to multivector X, whose local length equals the number of local rows.
virtual int Compute(const Ifpack_Graph &Graph)
Computes all it is necessary to initialize the reordering object.
std::vector< int > InvReorder_
Contains the inverse reordering.
int NumMyRows_
Number of local rows in the graph.