void add_matrix_to_matrix(double scalar,
const fei::Matrix& src_matrix,
fei::Matrix& dest_matrix)
{
fei::SharedPtr<fei::VectorSpace> vspace = src_matrix.getMatrixGraph()->getRowSpace();
int numRows = vspace->getNumIndices_Owned();
std::vector<int> rows(numRows);
vspace->getIndices_Owned(numRows, &rows[0], numRows);
std::vector<int> indices;
std::vector<double> coefs;
for(size_t i=0; i<rows.size(); ++i) {
int rowlen = 0;
src_matrix.getRowLength(rows[i], rowlen);
if ((int)indices.size() < rowlen) {
indices.resize(rowlen);
coefs.resize(rowlen);
}
src_matrix.copyOutRow(rows[i], rowlen, &coefs[0], &indices[0]);
for(int j=0; j<rowlen; ++j) {
coefs[j] *= scalar;
}
double* coefPtr = &coefs[0];
dest_matrix.sumIn(1, &rows[i], rowlen, &indices[0], &coefPtr);
}
}
bool confirm_matrix_values(const fei::Matrix& mat, double expected_value)
{
std::vector<int> rows;
fei::SharedPtr<fei::VectorSpace> rspace = mat.getMatrixGraph()->getRowSpace();
rspace->getIndices_Owned(rows);
bool result = true;
std::vector<int> indices;
std::vector<double> coefs;
for(size_t i=0; i<rows.size(); ++i) {
int rowlength = 0;
mat.getRowLength(rows[i], rowlength);
indices.resize(rowlength);
coefs.resize(rowlength);
mat.copyOutRow(rows[i], rowlength, &coefs[0], &indices[0]);
for(size_t j=0; j<indices.size(); ++j) {
if (std::abs(coefs[j] - expected_value) > 1.e-13) {
result = false;
break;
}
}
}
return result;
}