BLI_math_statistics.h File Reference

#include "BLI_compiler_attrs.h"
#include "BLI_math_inline.h"

Go to the source code of this file.

Functions
Covariance Matrices
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.
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.

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().