LU matrix decomposition

Performs $LU$ decomposition of square matrix $A=P*L*U$ (where $P$ is permutation matrix) and solves matrix equation $A*X=B$. More...

Collaboration diagram for LU matrix decomposition:

Functions
int	hal_ni_LU32f (float *src1, size_t src1_step, int m, float *src2, size_t src2_step, int n, int *info)
int	hal_ni_LU64f (double *src1, size_t src1_step, int m, double *src2, size_t src2_step, int n, int *info)

Detailed Description

Performs $LU$ decomposition of square matrix $A=P*L*U$ (where $P$ is permutation matrix) and solves matrix equation $A*X=B$.

Function returns the $sign$ of permutation $P$ via parameter info.

Parameters

src1	pointer to input matrix $A$ stored in row major order. After finish of work src1 contains at least $U$ part of $LU$ decomposition which is appropriate for determainant calculation: $det(A)=sign*\prod_{j=1}^{M}a_{jj}$.
src1_step	number of bytes between two consequent rows of matrix $A$.
m	size of square matrix $A$.
src2	pointer to $M\times N$ matrix $B$ which is the right-hand side of system $A*X=B$. $B$ stored in row major order. If src2 is null pointer only $LU$ decomposition will be performed. After finish of work src2 contains solution $X$ of system $A*X=B$.
src2_step	number of bytes between two consequent rows of matrix $B$.
n	number of right-hand vectors in $M\times N$ matrix $B$.
info	indicates success of decomposition. If *info is equals to zero decomposition failed, othervise *info is equals to $sign$.

Function Documentation

hal_ni_LU32f()

int hal_ni_LU32f ( float *  src1, size_t  src1_step, int  m, float *  src2, size_t  src2_step, int  n, int *  info  )

inline

#include <core/src/hal_replacement.hpp>

Referenced by hal_ni_dctFree2D().

Here is the caller graph for this function:

hal_ni_LU64f()

int hal_ni_LU64f ( double *  src1, size_t  src1_step, int  m, double *  src2, size_t  src2_step, int  n, int *  info  )

inline

#include <core/src/hal_replacement.hpp>

References CV_HAL_ERROR_NOT_IMPLEMENTED, and hal_ni_Cholesky32f().

Here is the call graph for this function: