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EpetraLinearOpTestHelpers.hpp
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5// Thyra: Interfaces and Support for Abstract Numerical Algorithms
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43
45
46
47namespace {
48
49
50RCP<Epetra_CrsMatrix> getEpetraMatrix(int numRows, int numCols, double shift=0.0)
51{
52
53 const RCP<const Epetra_Comm> comm = getEpetraComm();
54
55 const Epetra_Map rowMap(numRows, 0, *comm);
56 const Epetra_Map domainMap(numCols, numCols, 0, *comm);
57
58 const RCP<Epetra_CrsMatrix> epetraCrsM =
59 rcp(new Epetra_CrsMatrix(Copy, rowMap, numCols));
60
61 Array<double> rowEntries(numCols);
62 Array<int> columnIndices(numCols);
63 for (int j = 0; j < numCols; ++j) {
64 columnIndices[j] = j;
65 }
66
67 const int numLocalRows = rowMap.NumMyElements();
68
69 for (int i = 0; i < numLocalRows; ++i) {
70
71 for (int j = 0; j < numCols; ++j) {
72 rowEntries[j] = as<double>(i+1) + as<double>(j+1) / 10 + shift;
73 }
74
75 epetraCrsM->InsertMyValues( i, numCols, &rowEntries[0], &columnIndices[0] );
76
77 }
78
79 epetraCrsM->FillComplete(domainMap, rowMap);
80
81 return epetraCrsM;
82}
83
84
85} // namespace