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EpetraExt_View_CrsMatrix.cpp
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4// EpetraExt: Epetra Extended - Linear Algebra Services Package
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41
43
44#include <Epetra_CrsGraph.h>
45#include <Epetra_CrsMatrix.h>
46
47namespace EpetraExt {
48
51{
52 if( newObj_ ) delete newObj_;
53}
54
57operator()( OriginalTypeRef orig )
58{
59 origObj_ = &orig;
60
61 if( orig.IndicesAreGlobal() ) std::cout << "EDT_CrsMatrix_View: Indices must be LOCAL!\n";
62 assert( !orig.IndicesAreGlobal() );
63
64 //test graph, new graph must be contiguous subset of old
65
66 //intial construction of matrix
67 Epetra_CrsMatrix * newMatrix( new Epetra_CrsMatrix( View, NewGraph_ ) );
68
69 //insert views of row values
70 int * myIndices;
71 double * myValues;
72 int indicesCnt;
73 int numMyRows = newMatrix->NumMyRows();
74 for( int i = 0; i < numMyRows; ++i )
75 {
76 orig.ExtractMyRowView( i, indicesCnt, myValues, myIndices );
77
78 int newIndicesCnt = indicesCnt;
79 bool done = false;
80 for( int j = 0; j < indicesCnt; ++j )
81 if( !done && NewGraph_.GCID64( myIndices[j] ) == -1 )
82 {
83 newIndicesCnt = j;
84 done = true;
85 }
86
87 newMatrix->InsertMyValues( i, newIndicesCnt, myValues, myIndices );
88 }
89
90 newMatrix->FillComplete(false);
91
92 newObj_ = newMatrix;
93
94 return *newMatrix;
95}
96
97} // namespace EpetraExt
98
View
NewTypeRef operator()(OriginalTypeRef orig)
Transformation Operator.
const Epetra_CrsGraph & NewGraph_
long long GCID64(int LCID_in) const
int FillComplete(bool OptimizeDataStorage=true)
int NumMyRows() const
int InsertMyValues(int MyRow, int NumEntries, const double *Values, const int *Indices)
EpetraExt::BlockCrsMatrix: A class for constructing a distributed block matrix.