public static LSqrSparseMatrix TransposeFromDenseMatrix(double[,] mat)
{
LSqrSparseMatrix lsqr_mat = new LSqrSparseMatrix();
for (int col = 0; col < mat.GetLength(1); col++)
{
lsqr_mat.NewRow();
for (int row = 0; row < mat.GetLength(0); row++)
{
if (mat[row, col] != 0)
{
lsqr_mat.InsertValue(row, mat[row, col]);
}
}
}
return(lsqr_mat);
}
