template<typename _MatrixType> class Eigen::BDCSVD< _MatrixType >
class Bidiagonal Divide and Conquer SVD
Template Parameters
_MatrixType
the type of the matrix of which we are computing the SVD decomposition
This class first reduces the input matrix to bi-diagonal form using class UpperBidiagonalization, and then performs a divide-and-conquer diagonalization. Small blocks are diagonalized using class JacobiSVD. You can control the switching size with the setSwitchSize() method, default is 16. For small matrice (<16), it is thus preferable to directly use JacobiSVD. For larger ones, BDCSVD is highly recommended and can several order of magnitude faster.
Warning
this algorithm is unlikely to provide accurate result when compiled with unsafe math optimizations. For instance, this concerns Intel's compiler (ICC), which performs such optimization by default unless you compile with the -fp-modelprecise option. Likewise, the -ffast-math option of GCC or clang will significantly degrade the accuracy.
Constructor performing the decomposition of given matrix.
Parameters
matrix
the matrix to decompose
computationOptions
optional parameter allowing to specify if you want full or thin U or V unitaries to be computed. By default, none is computed. This is a bit - field, the possible bits are ComputeFullU, ComputeThinU, ComputeFullV, ComputeThinV.
Thin unitaries are only available if your matrix type has a Dynamic number of columns (for example MatrixXf). They also are not available with the (non - default) FullPivHouseholderQR preconditioner.
Method performing the decomposition of given matrix using custom options.
Parameters
matrix
the matrix to decompose
computationOptions
optional parameter allowing to specify if you want full or thin U or V unitaries to be computed. By default, none is computed. This is a bit - field, the possible bits are ComputeFullU, ComputeThinU, ComputeFullV, ComputeThinV.
Thin unitaries are only available if your matrix type has a Dynamic number of columns (for example MatrixXf). They also are not available with the (non - default) FullPivHouseholderQR preconditioner.
Public Member Functions inherited from Eigen::SVDBase< BDCSVD< _MatrixType > >
