#include "BLI_math_base.h"
#include "BLI_math_statistics.h"
#include "BLI_math_vector.h"
#include "BLI_task.h"
#include "BLI_utildefines.h"
#include "BLI_strict_flags.h"

Classes
struct	CovarianceData

Typedefs
typedef struct CovarianceData	CovarianceData

Functions
static void	covariance_m_vn_ex_task_cb (void __restrict userdata, const int a, const TaskParallelTLS __restrict UNUSED(tls))

void	BLI_covariance_m_vn_ex (const int n, const float cos_vn, const int cos_vn_num, const float center, const bool use_sample_correction, float *r_covmat)
	Compute the covariance matrix of given set of nD coordinates.

void	BLI_covariance_m3_v3n (const float(*cos_v3)[3], const int cos_v3_num, const bool use_sample_correction, float r_covmat[3][3], float r_center[3])
	Compute the covariance matrix of given set of 3D coordinates.

Typedef Documentation

◆ CovarianceData

typedef struct CovarianceData CovarianceData

Function Documentation

◆ BLI_covariance_m3_v3n()

void BLI_covariance_m3_v3n	(	const float(*)	cos_v3[3],
		int	cos_v3_num,
		bool	use_sample_correction,
		float	r_covmat[3][3],
		float	r_center[3] )

Compute the covariance matrix of given set of 3D coordinates.

Parameters

cos_v3	the 3D points to compute covariance from.
cos_v3_num	the number of 3D coordinates in cos_v3.

Returns: r_covmat the computed covariance matrix.; r_center the computed center (mean) of 3D points (may be NULL).

Definition at line 105 of file math_statistics.c.

References BLI_covariance_m_vn_ex(), copy_v3_v3(), float, madd_v3_v3fl(), and zero_v3().

Referenced by mesh_calc_eigen_matrix().

◆ BLI_covariance_m_vn_ex()

void BLI_covariance_m_vn_ex	(	int	n,
		const float *	cos_vn,
		int	cos_vn_num,
		const float *	center,
		bool	use_sample_correction,
		float *	r_covmat )

Compute the covariance matrix of given set of nD coordinates.

Parameters

n	the dimension of the vectors (and hence, of the covariance matrix to compute).
cos_vn	the nD points to compute covariance from.
cos_vn_num	the number of nD coordinates in cos_vn.
center	the center (or mean point) of cos_vn. If NULL, it is assumed cos_vn is already centered.
use_sample_correction	whether to apply sample correction (i.e. get 'sample variance' instead of 'population variance').

Returns: r_covmat the computed covariance matrix.

Definition at line 76 of file math_statistics.c.

References BLI_parallel_range_settings_defaults(), BLI_task_parallel_range(), CovarianceData::cos_vn, covariance_m_vn_ex_task_cb(), and float.

Referenced by BLI_covariance_m3_v3n().

◆ covariance_m_vn_ex_task_cb()

static void covariance_m_vn_ex_task_cb	(	void *__restrict	userdata,
		const int	a,
		const TaskParallelTLS *__restrict	UNUSEDtls )

static

Definition at line 29 of file math_statistics.c.

References CovarianceData::cos_vn.

Referenced by BLI_covariance_m_vn_ex().

Classes