WebSVN – gelsvn – Diff – /branches/cpp11-devel/src/CGLA/statistics.h


/* ----------------------------------------------------------------------- *
 * This file is part of GEL, http://www.imm.dtu.dk/GEL
 * Copyright (C) the authors and DTU Informatics
 * For license and list of authors, see ../../doc/intro.pdf
 * ----------------------------------------------------------------------- */
 
/** @file statistics.h
 * Compute mean and covariance of CGLA vectors - simple multivariate statistics.
 */
 
#ifndef __CGLA_STATISTICS_H__
#define __CGLA_STATISTICS_H__
 
#if (_MSC_VER >= 1200)
#pragma warning (disable: 4018 4244 4800)
#endif
 
#include <vector>
 
namespace CGLA
{
		template<class VT>
				VT mean(const std::vector<VT>& vec)
				{
						VT v(0);
						for(unsigned int i=0;i<vec.size();++i)
								v += vec[i];
						v /= vec.size();
 
						return v;
				}
 
 
		/** Function that computes the covariance of a set of points.
				This function returns the mean, and, upon completion, the
				final argument contains the covariance matrix.
 
				This template is instantiated for Vec3f, Vec2f, and Vec4f. */
			
		template<class VT, class MT>
				VT covariance(const std::vector<VT>& vec, MT& C_out);
}
 
 
 
 
#endif
 

Subversion Repositories gelsvn

(root)/branches/cpp11-devel/src/CGLA/statistics.h – Rev 595 → 630

Rev 595		Rev 630
1	`/* ----------------------------------------------------------------------- *`	1	`/* ----------------------------------------------------------------------- *`
2	`* This file is part of GEL, http://www.imm.dtu.dk/GEL`	2	`* This file is part of GEL, http://www.imm.dtu.dk/GEL`
3	`* Copyright (C) the authors and DTU Informatics`	3	`* Copyright (C) the authors and DTU Informatics`
4	`* For license and list of authors, see ../../doc/intro.pdf`	4	`* For license and list of authors, see ../../doc/intro.pdf`
5	`* ----------------------------------------------------------------------- */`	5	`* ----------------------------------------------------------------------- */`
6		6
7	`/** @file statistics.h`	7	`/** @file statistics.h`
8	`* Compute mean and covariance of CGLA vectors - simple multivariate statistics.`	8	`* Compute mean and covariance of CGLA vectors - simple multivariate statistics.`
9	`*/`	9	`*/`
10		10
11	`#ifndef __CGLA_STATISTICS_H__`	11	`#ifndef __CGLA_STATISTICS_H__`
12	`#define __CGLA_STATISTICS_H__`	12	`#define __CGLA_STATISTICS_H__`
13		13
14	`#if (_MSC_VER >= 1200)`	14	`#if (_MSC_VER >= 1200)`
15	`#pragma warning (disable: 4018 4244 4800)`	15	`#pragma warning (disable: 4018 4244 4800)`
16	`#endif`	16	`#endif`
17		17
18	`#include <vector>`	18	`#include <vector>`
19		19
20	`namespace CGLA`	20	`namespace CGLA`
21	`{`	21	`{`
22	`template<class VT>`	22	`template<class VT>`
23	`VT mean(const std::vector<VT>& vec)`	23	`VT mean(const std::vector<VT>& vec)`
24	`{`	24	`{`
25	`VT v(0);`	25	`VT v(0);`
26	`for(unsigned int i=0;i<vec.size();++i)`	26	`for(unsigned int i=0;i<vec.size();++i)`
27	`v += vec[i];`	27	`v += vec[i];`
28	`v /= vec.size();`	28	`v /= vec.size();`
29		29
30	`return v;`	30	`return v;`
31	`}`	31	`}`
32		32
33		33
34	`/** Function that computes the covariance of a set of points.`	34	`/** Function that computes the covariance of a set of points.`
35	`This function returns the mean, and, upon completion, the`	35	`This function returns the mean, and, upon completion, the`
36	`final argument contains the covariance matrix.`	36	`final argument contains the covariance matrix.`
37		37
38	`This template is instantiated for Vec3f, Vec2f, and Vec4f. */`	38	`This template is instantiated for Vec3f, Vec2f, and Vec4f. */`
39		39
40	`template<class VT, class MT>`	40	`template<class VT, class MT>`
41	`VT covariance(const std::vector<VT>& vec, MT& C_out);`	41	`VT covariance(const std::vector<VT>& vec, MT& C_out);`
42	`}`	42	`}`
43		43
44		44
45		45
46		46
47	`#endif`	47	`#endif`
48		48