详细描述

Class which collects generic mathematical functions.

在文件 Math.h 第 134 行定义.

类 CMath 继承关系图:

类
struct	IndexSorter

Public 成员函数
virtual const char *	get_name () const

template<>
float64_t *	linspace (complex128_t start, complex128_t end, int32_t n)
	linspace not implemented for complex128_t, returns null instead 更多...

virtual CSGObject *	shallow_copy () const

virtual CSGObject *	deep_copy () const

virtual bool	is_generic (EPrimitiveType *generic) const

template<class T >
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

template<>
void	set_generic ()

void	unset_generic ()

virtual void	print_serializable (const char *prefix="")

virtual bool	save_serializable (CSerializableFile file, const char prefix="")

virtual bool	load_serializable (CSerializableFile file, const char prefix="")

void	set_global_io (SGIO *io)

SGIO *	get_global_io ()

void	set_global_parallel (Parallel *parallel)

Parallel *	get_global_parallel ()

void	set_global_version (Version *version)

Version *	get_global_version ()

SGStringList< char >	get_modelsel_names ()

void	print_modsel_params ()

char *	get_modsel_param_descr (const char *param_name)

index_t	get_modsel_param_index (const char *param_name)

void	build_gradient_parameter_dictionary (CMap< TParameter , CSGObject > *dict)

virtual void	update_parameter_hash ()

virtual bool	parameter_hash_changed ()

virtual bool	equals (CSGObject *other, float64_t accuracy=0.0, bool tolerant=false)

virtual CSGObject *	clone ()

Constructor/Destructor.
	CMath ()
	Constructor - initializes log-table. 更多...

virtual	~CMath ()
	Destructor - frees logtable. 更多...

静态 Public 成员函数
template<class T >
static T	min (T *vec, int32_t len)

template<class T >
static T	max (T *vec, int32_t len)

template<class T >
static T	clamp (T value, T lb, T ub)

template<class T >
static int32_t	arg_max (T vec, int32_t inc, int32_t len, T maxv_ptr=NULL)

template<class T >
static int32_t	arg_min (T vec, int32_t inc, int32_t len, T minv_ptr=NULL)

static float64_t	exp (float64_t x)

static float64_t	dot (const bool v1, const bool v2, int32_t n)
	Compute dot product between v1 and v2 (blas optimized) 更多...

static floatmax_t	dot (const floatmax_t v1, const floatmax_t v2, int32_t n)
	Compute dot product between v1 and v2 (blas optimized) 更多...

static float64_t	dot (const float64_t v1, const float64_t v2, int32_t n)
	Compute dot product between v1 and v2 (blas optimized) 更多...

static float32_t	dot (const float32_t v1, const float32_t v2, int32_t n)
	Compute dot product between v1 and v2 (blas optimized) 更多...

static float64_t	dot (const uint64_t v1, const uint64_t v2, int32_t n)
	compute dot product between v1 and v2 (for 64bit unsigned ints) 更多...

static float64_t	dot (const int64_t v1, const int64_t v2, int32_t n)
	Compute dot product between v1 and v2 (for 64bit ints) 更多...

static float64_t	dot (const int32_t v1, const int32_t v2, int32_t n)
	Compute dot product between v1 and v2 (for 32bit ints) 更多...

static float64_t	dot (const uint32_t v1, const uint32_t v2, int32_t n)
	Compute dot product between v1 and v2 (for 32bit unsigned ints) 更多...

static float64_t	dot (const uint16_t v1, const uint16_t v2, int32_t n)
	Compute dot product between v1 and v2 (for 16bit unsigned ints) 更多...

static float64_t	dot (const int16_t v1, const int16_t v2, int32_t n)
	Compute dot product between v1 and v2 (for 16bit unsigned ints) 更多...

static float64_t	dot (const char v1, const char v2, int32_t n)
	Compute dot product between v1 and v2 (for 8bit (un)signed ints) 更多...

static float64_t	dot (const uint8_t v1, const uint8_t v2, int32_t n)
	Compute dot product between v1 and v2 (for 8bit (un)signed ints) 更多...

static float64_t	dot (const int8_t v1, const int8_t v2, int32_t n)
	Compute dot product between v1 and v2 (for 8bit (un)signed ints) 更多...

static float64_t	dot (const float64_t v1, const char v2, int32_t n)
	Compute dot product between v1 and v2. 更多...

static float64_t	area_under_curve (float64_t *xy, int32_t len, bool reversed)

static bool	strtof (const char str, float32_t float_result)

static bool	strtod (const char str, float64_t double_result)

static bool	strtold (const char str, floatmax_t long_double_result)

static int64_t	factorial (int32_t n)

template<class T >
static void	permute (SGVector< T > v, CRandom *rand=NULL)

template<class T >
static int32_t	get_num_nonzero (T *vec, int32_t len)

static int32_t	get_num_nonzero (complex128_t *vec, int32_t len)

static int64_t	nchoosek (int32_t n, int32_t k)

static void	linspace (float64_t *output, float64_t start, float64_t end, int32_t n=100)

template<class T >
static float64_t *	linspace (T start, T end, int32_t n)

template<class T >
static SGVector< float64_t >	linspace_vec (T start, T end, int32_t n)

template<class T >
static T	log_sum_exp (SGVector< T > values)

template<class T >
static T	log_mean_exp (SGVector< T > values)

static void	sort (int32_t *a, int32_t cols, int32_t sort_col=0)

static void	sort (float64_t a, int32_t idx, int32_t N)

template<class T >
static void	qsort (T *output, int32_t size)

template<class T >
static void	insertion_sort (T *output, int32_t size)

template<class T >
static void	radix_sort (T *array, int32_t size)

template<class T >
static uint8_t	byte (T word, uint16_t p)

static uint8_t	byte (complex128_t word, uint16_t p)
	byte not implemented for complex128_t 更多...

template<class T >
static void	radix_sort_helper (T *array, int32_t size, uint16_t i)

static void	radix_sort_helper (complex128_t *array, int32_t size, uint16_t i)
	radix_sort_helper not implemented for complex128_t 更多...

template<class T >
static void	qsort (T **vector, index_t length)

static void	qsort (complex128_t **vector, index_t length)
	qsort not implemented for complex128_t 更多...

template<class T >
static void	qsort (SGVector< T > vector)

template<class T >
static SGVector< index_t >	argsort (SGVector< T > vector)

template<class T >
static bool	is_sorted (SGVector< T > vector)

template<class T >
static void	display_bits (T word, int32_t width=8 *sizeof(T))

static void	display_bits (complex128_t word, int32_t width=8 *sizeof(complex128_t))
	disply_bits not implemented for complex128_t 更多...

template<class T1 , class T2 >
static void	qsort_index (T1 output, T2 index, uint32_t size)

template<class T >
static void	qsort_index (complex128_t output, T index, uint32_t size)
	qsort_index not implemented for complex128_t 更多...

template<class T1 , class T2 >
static void	qsort_backward_index (T1 output, T2 index, int32_t size)

template<class T >
static void	qsort_backword_index (complex128_t output, T index, uint32_t size)
	qsort_backword_index not implemented for complex128_t 更多...

template<class T1 , class T2 >
static void	parallel_qsort_index (T1 output, T2 index, uint32_t size, int32_t n_threads, int32_t limit=262144)

template<class T >
static void	parallel_qsort_index (complex128_t output, T index, uint32_t size, int32_t n_threads, int32_t limit=0)
	parallel_qsort_index not implemented for complex128_t 更多...

template<class T1 , class T2 >
static void *	parallel_qsort_index (void *p)
	helper function for parallel_qsort_index. 更多...

template<class T >
static void	min (float64_t output, T index, int32_t size)

static void	min (float64_t output, complex128_t index, int32_t size)
	complex128_t cannot be used as index 更多...

template<class T >
static void	nmin (float64_t output, T index, int32_t size, int32_t n)

static void	nmin (float64_t output, complex128_t index, int32_t size, int32_t n)
	complex128_t cannot be used as index 更多...

template<class T >
static int32_t	binary_search_helper (T *output, int32_t size, T elem)

static int32_t	binary_search_helper (complex128_t *output, int32_t size, complex128_t elem)
	binary_search_helper not implemented for complex128_t 更多...

template<class T >
static int32_t	binary_search (T *output, int32_t size, T elem)

static int32_t	binary_search (complex128_t *output, int32_t size, complex128_t elem)
	binary_search not implemented for complex128_t 更多...

template<class T >
static int32_t	binary_search (T *vector, index_t length, T elem)

static int32_t	binary_search (complex128_t *vector, index_t length, complex128_t elem)
	binary_search not implemented for complex128_t 更多...

template<class T >
static int32_t	binary_search_max_lower_equal (T *output, int32_t size, T elem)

static int32_t	binary_search_max_lower_equal (complex128_t *output, int32_t size, complex128_t elem)
	binary_search_max_lower_equal not implemented for complex128_t 更多...

static float64_t	Align (char seq1, char seq2, int32_t l1, int32_t l2, float64_t gapCost)

static float64_t	real (complex128_t c)

static float64_t	imag (complex128_t c)

static uint32_t	get_seed ()
	returns number generator seed 更多...

static uint32_t	get_log_range ()
	returns range of logtable 更多...

static int	is_finite (double f)
	checks whether a float is finite 更多...

static int	is_infinity (double f)
	checks whether a float is infinity 更多...

static int	is_nan (double f)
	checks whether a float is nan 更多...

min/max/abs functions.
template<class T >
static T	min (T a, T b)

template<class T >
static T	max (T a, T b)

template<class T >
static T	abs (T a)

static float64_t	abs (complex128_t a)

misc functions
template<class T >
static bool	fequals_abs (const T &a, const T &b, const float64_t eps)

template<class T >
static bool	fequals (const T &a, const T &b, const float64_t eps, bool tolerant=false)

static float64_t	get_abs_tolerance (float64_t true_value, float64_t rel_tolerance)

static float64_t	round (float64_t d)

static float64_t	floor (float64_t d)

static float64_t	ceil (float64_t d)

template<class T >
static T	sign (T a)

template<class T >
static void	swap (T &a, T &b)

template<class T >
static T	sq (T x)

static float32_t	sqrt (float32_t x)

static float64_t	sqrt (float64_t x)

static floatmax_t	sqrt (floatmax_t x)

static float32_t	invsqrt (float32_t x)
	x^0.5, x being a complex128_t 更多...

Exponential methods (x^n)
static floatmax_t	powl (floatmax_t x, floatmax_t n)

static int32_t	pow (bool x, int32_t n)

static int32_t	pow (int32_t x, int32_t n)

static float64_t	pow (float64_t x, int32_t n)

static float64_t	pow (float64_t x, float64_t n)

static complex128_t	pow (complex128_t x, int32_t n)

static complex128_t	pow (complex128_t x, complex128_t n)

static complex128_t	pow (complex128_t x, float64_t n)

static complex128_t	pow (float64_t x, complex128_t n)

Trignometric and Hyperbolic Functions
exp(x), x being a complex128_t
static float64_t	tan (float64_t x)

static float64_t	atan (float64_t x)
	tan(x), x being a complex128_t 更多...

static float64_t	atan2 (float64_t y, float64_t x)
	atan(x), x being a complex128_t not implemented 更多...

static float64_t	tanh (float64_t x)
	atan2(x), x being a complex128_t not implemented 更多...

static float64_t	sin (float64_t x)
	tanh(x), x being a complex128_t 更多...

static float64_t	asin (float64_t x)
	sin(x), x being a complex128_t 更多...

static float64_t	sinh (float64_t x)
	asin(x), x being a complex128_t not implemented 更多...

static float64_t	cos (float64_t x)
	sinh(x), x being a complex128_t 更多...

static float64_t	acos (float64_t x)
	cos(x), x being a complex128_t 更多...

static float64_t	cosh (float64_t x)
	acos(x), x being a complex128_t not implemented 更多...

Logarithmic functions
cosh(x), x being a complex128_t
static float64_t	log10 (float64_t v)

static float64_t	log2 (float64_t v)
	log10(x), x being a complex128_t 更多...

static float64_t	log (float64_t v)

static index_t	floor_log (index_t n)
	log(x), x being a complex128_t 更多...

Random Functions
static void	init_random (uint32_t initseed=0)

static uint64_t	random ()

static uint64_t	random (uint64_t min_value, uint64_t max_value)

static int64_t	random (int64_t min_value, int64_t max_value)

static uint32_t	random (uint32_t min_value, uint32_t max_value)

static int32_t	random (int32_t min_value, int32_t max_value)

static float32_t	random (float32_t min_value, float32_t max_value)

static float64_t	random (float64_t min_value, float64_t max_value)

static floatmax_t	random (floatmax_t min_value, floatmax_t max_value)

static float32_t	normal_random (float32_t mean, float32_t std_dev)

static float64_t	normal_random (float64_t mean, float64_t std_dev)

static float32_t	randn_float ()

static float64_t	randn_double ()

summing functions
static float64_t	logarithmic_sum (float64_t p, float64_t q)

Public 属性
SGIO *	io

Parallel *	parallel

Version *	version

Parameter *	m_parameters

Parameter *	m_model_selection_parameters

Parameter *	m_gradient_parameters

uint32_t	m_hash

Protected 成员函数
virtual void	load_serializable_pre () throw (ShogunException)

virtual void	load_serializable_post () throw (ShogunException)

virtual void	save_serializable_pre () throw (ShogunException)

virtual void	save_serializable_post () throw (ShogunException)

constants
static const float64_t	NOT_A_NUMBER = NAN
	not a number 更多...

static const float64_t	INFTY = INFINITY
	infinity 更多...

static const float64_t	ALMOST_INFTY = +1e+300

static const float64_t	ALMOST_NEG_INFTY = -1e+300
	almost neg (log) infinity 更多...

static const float64_t	PI =M_PI

static const float64_t	MACHINE_EPSILON =DBL_EPSILON

static const float64_t	MAX_REAL_NUMBER =DBL_MAX

static const float64_t	MIN_REAL_NUMBER =DBL_MIN

static const float32_t	F_MAX_VAL32 =FLT_MAX

static const float32_t	F_MIN_NORM_VAL32 =FLT_MIN

static const float64_t	F_MAX_VAL64 =DBL_MAX

static const float64_t	F_MIN_NORM_VAL64 =DBL_MIN

static const float32_t	F_MIN_VAL32 =(FLT_MIN * FLT_EPSILON)

static const float64_t	F_MIN_VAL64 =(DBL_MIN * DBL_EPSILON)

static int32_t	LOGRANGE = 0
	range for logtable: log(1+exp(x)) -LOGRANGE <= x <= 0 更多...

static uint32_t	seed = 0
	random generator seed 更多...

构造及析构函数说明

CMath ( )

Constructor - initializes log-table.

在文件 Math.cpp 第 65 行定义.

~CMath ( )

virtual

Destructor - frees logtable.

在文件 Math.cpp 第 82 行定义.

成员函数说明

static T abs ( T a )

static

Returns the absolute value of a number, that is if a>0, output is a; if a<0 ,output is -a

参数

a	complex number

返回: the corresponding absolute value

在文件 Math.h 第 179 行定义.

static float64_t abs ( complex128_t a )

static

Returns the absolute value of a complex number

参数

a	complex number

返回: the corresponding absolute value

在文件 Math.h 第 195 行定义.

static float64_t acos ( float64_t x )

static

cos(x), x being a complex128_t

Computes arc cosine of input

参数

x input

返回: arccos(x)

在文件 Math.h 第 868 行定义.

float64_t Align	(	char *	seq1,
		char *	seq2,
		int32_t	l1,
		int32_t	l2,
		float64_t	gapCost
	)

static

Align two sequences seq1 & seq2 of length l1 and l2 using gapCost

参数

seq1	first sequence
seq2	second sequence
l1	length of first sequence
l2	length of second sequence
gapCost

返回: alignment cost

在文件 Math.cpp 第 194 行定义.

static float64_t area_under_curve	(	float64_t *	xy,
		int32_t	len,
		bool	reversed
	)

static

Computes area under the curve

参数

xy
len	length
reversed	boolean

返回: area

在文件 Math.h 第 946 行定义.

static int32_t arg_max	(	T *	vec,
		int32_t	inc,
		int32_t	len,
		T *	maxv_ptr = `NULL`
	)

static

Returns the index of the maximum value

参数

vec	input vector
inc	increment factor
len	length of the input vector
maxv_ptr	pointer to store the maximum value

返回: index of the maximum value

在文件 Math.h 第 262 行定义.

static int32_t arg_min	(	T *	vec,
		int32_t	inc,
		int32_t	len,
		T *	minv_ptr = `NULL`
	)

static

Returns the index of the minimum value

参数

vec	input vector
inc	increment factor
len	length of the input vector
minv_ptr	pointer to store the minimum value

返回: index of the minimum value

在文件 Math.h 第 289 行定义.

static SGVector<index_t> argsort ( SGVector< T > vector )

static

Get sorted index.

idx = v.argsort() is similar to Matlab [~, idx] = sort(v)

参数

vector vector to be sorted

返回: sorted index for this vector

在文件 Math.h 第 1599 行定义.

static float64_t asin ( float64_t x )

static

sin(x), x being a complex128_t

Computes arc sine of input

参数

x input

返回: arcsin(x)

在文件 Math.h 第 832 行定义.

static float64_t atan ( float64_t x )

static

tan(x), x being a complex128_t

Computes arc tangent of input

参数

x input

返回: arctan(x)

在文件 Math.h 第 783 行定义.

static float64_t atan2	(	float64_t	y,
		float64_t	x
	)

static

atan(x), x being a complex128_t not implemented

Computes arc tangent with 2 parameters

参数

y	input(numerator)
x	input(denominator)

返回: arctan(y/x)

在文件 Math.h 第 796 行定义.

static int32_t binary_search	(	T *	output,
		int32_t	size,
		T	elem
	)

static

Finds an element in a sorted array via binary search

参数

output	array to search
size	size of array
elem	element to search

返回: -1 if not found

在文件 Math.h 第 1809 行定义.

static int32_t binary_search	(	complex128_t *	output,
		int32_t	size,
		complex128_t	elem
	)

static

binary_search not implemented for complex128_t

在文件 Math.h 第 1818 行定义.

static int32_t binary_search	(	T **	vector,
		index_t	length,
		T *	elem
	)

static

Finds an element in a sorted array of pointers via binary search Every element is dereferenced once before being compared

参数

vector	array of pointers to search in (assumed being sorted)
length	length of array
elem	pointer to element to search for

返回: index of elem, -1 if not found

在文件 Math.h 第 1833 行定义.

static int32_t binary_search	(	complex128_t **	vector,
		index_t	length,
		complex128_t *	elem
	)

static

binary_search not implemented for complex128_t

在文件 Math.h 第 1864 行定义.

static int32_t binary_search_helper	(	T *	output,
		int32_t	size,
		T	elem
	)

static

Finds an element in a sorted array via binary search returns -1 if not found

在文件 Math.h 第 1772 行定义.

static int32_t binary_search_helper	(	complex128_t *	output,
		int32_t	size,
		complex128_t	elem
	)

static

binary_search_helper not implemented for complex128_t

在文件 Math.h 第 1796 行定义.

static int32_t binary_search_max_lower_equal	(	T *	output,
		int32_t	size,
		T	elem
	)

static

Finds greatest element which is less than or equal to the searched element (query).

参数

output	array to search
size	size of the array
elem	element that needs to be searched

在文件 Math.h 第 1877 行定义.

static int32_t binary_search_max_lower_equal	(	complex128_t *	output,
		int32_t	size,
		complex128_t	elem
	)

static

binary_search_max_lower_equal not implemented for complex128_t

在文件 Math.h 第 1890 行定义.

void build_gradient_parameter_dictionary ( CMap< TParameter *, CSGObject * > * dict )

inherited

Builds a dictionary of all parameters in SGObject as well of those of SGObjects that are parameters of this object. Dictionary maps parameters to the objects that own them.

参数

dict	dictionary of parameters to be built.

在文件 SGObject.cpp 第 597 行定义.

static uint8_t byte	(	T	word,
		uint16_t	p
	)

static

Extract the byte at position p (from left) of a 64 bit integer. The function is somewhat identical to accessing an array of characters via [].

参数

word	input from which byte is extracted
p	position

返回: byte

在文件 Math.h 第 1391 行定义.

static uint8_t byte	(	complex128_t	word,
		uint16_t	p
	)

static

byte not implemented for complex128_t

在文件 Math.h 第 1397 行定义.

static float64_t ceil ( float64_t d )

static

The value of x rounded upward (as a floating-point value)

参数

d	input decimal value

返回: rounded off value

在文件 Math.h 第 416 行定义.

static T clamp	(	T	value,
		T	lb,
		T	ub
	)

static

Returns the value clamped to interval [lb,ub]

参数

value	input value
lb	lower bound
ub	upper bound

返回: the corresponding clamped value

在文件 Math.h 第 244 行定义.

CSGObject * clone ( )

virtualinherited

Creates a clone of the current object. This is done via recursively traversing all parameters, which corresponds to a deep copy. Calling equals on the cloned object always returns true although none of the memory of both objects overlaps.

返回: an identical copy of the given object, which is disjoint in memory. NULL if the clone fails. Note that the returned object is SG_REF'ed

在文件 SGObject.cpp 第 714 行定义.

static float64_t cos ( float64_t x )

static

sinh(x), x being a complex128_t

Computes cosine of input

参数

x input

返回: cos(x)

在文件 Math.h 第 856 行定义.

static float64_t cosh ( float64_t x )

static

acos(x), x being a complex128_t not implemented

Computes hyperbolic cosine of input

参数

x input

返回: cosh(x)

在文件 Math.h 第 880 行定义.

CSGObject * deep_copy ( ) const

virtualinherited

A deep copy. All the instance variables will also be copied.

在文件 SGObject.cpp 第 198 行定义.

static void display_bits	(	T	word,
		int32_t	width = `8*sizeof(T)`
	)

static

Display bits (useful for debugging)

参数

word	input to be displayed as bits
width	number of bits displayed

在文件 Math.h 第 1635 行定义.

static void display_bits	(	complex128_t	word,
		int32_t	width = `8*sizeof(complex128_t)`
	)

static

disply_bits not implemented for complex128_t

在文件 Math.h 第 1654 行定义.

static float64_t dot	(	const bool *	v1,
		const bool *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (blas optimized)

在文件 Math.h 第 627 行定义.

static floatmax_t dot	(	const floatmax_t *	v1,
		const floatmax_t *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (blas optimized)

在文件 Math.h 第 636 行定义.

float64_t dot	(	const float64_t *	v1,
		const float64_t *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (blas optimized)

在文件 Math.cpp 第 90 行定义.

float32_t dot	(	const float32_t *	v1,
		const float32_t *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (blas optimized)

在文件 Math.cpp 第 107 行定义.

static float64_t dot	(	const uint64_t *	v1,
		const uint64_t *	v2,
		int32_t	n
	)

static

compute dot product between v1 and v2 (for 64bit unsigned ints)

在文件 Math.h 第 652 行定义.

static float64_t dot	(	const int64_t *	v1,
		const int64_t *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (for 64bit ints)

在文件 Math.h 第 662 行定义.

static float64_t dot	(	const int32_t *	v1,
		const int32_t *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (for 32bit ints)

在文件 Math.h 第 673 行定义.

static float64_t dot	(	const uint32_t *	v1,
		const uint32_t *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (for 32bit unsigned ints)

在文件 Math.h 第 684 行定义.

static float64_t dot	(	const uint16_t *	v1,
		const uint16_t *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (for 16bit unsigned ints)

在文件 Math.h 第 695 行定义.

static float64_t dot	(	const int16_t *	v1,
		const int16_t *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (for 16bit unsigned ints)

在文件 Math.h 第 706 行定义.

static float64_t dot	(	const char *	v1,
		const char *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (for 8bit (un)signed ints)

在文件 Math.h 第 717 行定义.

static float64_t dot	(	const uint8_t *	v1,
		const uint8_t *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (for 8bit (un)signed ints)

在文件 Math.h 第 728 行定义.

static float64_t dot	(	const int8_t *	v1,
		const int8_t *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2 (for 8bit (un)signed ints)

在文件 Math.h 第 739 行定义.

static float64_t dot	(	const float64_t *	v1,
		const char *	v2,
		int32_t	n
	)

static

Compute dot product between v1 and v2.

在文件 Math.h 第 750 行定义.

bool equals	(	CSGObject *	other,
		float64_t	accuracy = `0.0`,
		bool	tolerant = `false`
	)

virtualinherited

Recursively compares the current SGObject to another one. Compares all registered numerical parameters, recursion upon complex (SGObject) parameters. Does not compare pointers!

May be overwritten but please do with care! Should not be necessary in most cases.

参数

other	object to compare with
accuracy	accuracy to use for comparison (optional)
tolerant	allows linient check on float equality (within accuracy)

返回: true if all parameters were equal, false if not

在文件 SGObject.cpp 第 618 行定义.

static float64_t exp ( float64_t x )

static

Computes e^x where e=2.71828 approx.

参数

x exponent

在文件 Math.h 第 621 行定义.

static int64_t factorial ( int32_t n )

static

Computes factorial of input

参数

n input

返回: factorial of n (n!)

在文件 Math.h 第 991 行定义.

static bool fequals	(	const T &	a,
		const T &	b,
		const float64_t	eps,
		bool	tolerant = `false`
	)

static

Compares the value of two floats (handles special cases, such as NaN, Inf etc.) Note: returns true if a == b == NAN Implementation inspired by http://floating-point-gui.de/errors/comparison/

参数

a	first value to compare
b	second value to compare
eps	threshold for values to be equal/different
tolerant	allows linient check on float equality (within accuracy)

返回: true if values are equal within eps accuracy, false if not.

在文件 Math.h 第 335 行定义.

static bool fequals_abs	(	const T &	a,
		const T &	b,
		const float64_t	eps
	)

static

Compares the value of two floats based on eps only

参数

a	first value to compare
b	second value to compare
eps	threshold for values to be equal/different

返回: true if values are equal within eps accuracy, false if not.

在文件 Math.h 第 318 行定义.

static float64_t floor ( float64_t d )

static

The value of x rounded downward (as a floating-point value)

参数

d	input decimal value

返回: rounded off value

在文件 Math.h 第 407 行定义.

static index_t floor_log ( index_t n )

static

log(x), x being a complex128_t

在文件 Math.h 第 930 行定义.

float64_t get_abs_tolerance	(	float64_t	true_value,
		float64_t	rel_tolerance
	)

static

在文件 Math.cpp 第 397 行定义.

SGIO * get_global_io ( )

inherited

get the io object

返回: io object

在文件 SGObject.cpp 第 235 行定义.

Parallel * get_global_parallel ( )

inherited

get the parallel object

返回: parallel object

在文件 SGObject.cpp 第 277 行定义.

Version * get_global_version ( )

inherited

get the version object

返回: version object

在文件 SGObject.cpp 第 290 行定义.

static uint32_t get_log_range ( )

static

returns range of logtable

在文件 Math.h 第 1937 行定义.

SGStringList< char > get_modelsel_names ( )

inherited

返回: vector of names of all parameters which are registered for model selection

在文件 SGObject.cpp 第 498 行定义.

char * get_modsel_param_descr ( const char * param_name )

inherited

Returns description of a given parameter string, if it exists. SG_ERROR otherwise

参数

param_name name of the parameter

返回: description of the parameter

在文件 SGObject.cpp 第 522 行定义.

index_t get_modsel_param_index ( const char * param_name )

inherited

Returns index of model selection parameter with provided index

参数

param_name name of model selection parameter

返回: index of model selection parameter with provided name, -1 if there is no such

在文件 SGObject.cpp 第 535 行定义.

virtual const char* get_name ( ) const

virtual

返回: object name

实现了 CSGObject.

在文件 Math.h 第 2041 行定义.

static int32_t get_num_nonzero	(	T *	vec,
		int32_t	len
	)

static

Computes sum of non-zero elements

参数

vec	vector
len	length

返回: non-zero sum

在文件 Math.h 第 1164 行定义.

static int32_t get_num_nonzero	(	complex128_t *	vec,
		int32_t	len
	)

static

Computes sum of non-zero elements

参数

vec	vector of complex numbers
len	length

返回: non-zero sum

在文件 Math.h 第 1178 行定义.

static uint32_t get_seed ( )

static

returns number generator seed

在文件 Math.h 第 1931 行定义.

static float64_t imag ( complex128_t c )

static

Returns imaginary part of a complex128_t number

参数

c	complex number

返回: imaginary part of the complex number

在文件 Math.h 第 1925 行定义.

static void init_random ( uint32_t initseed = 0 )

static

Initiates seed for pseudo random generator

参数

initseed value of seed

在文件 Math.h 第 1006 行定义.

static void insertion_sort	(	T *	output,
		int32_t	size
	)

static

Performs insertion sort of an array output of length size it is sorted from in ascending (for type T)

参数

output	array to be sorted
size	size of array

在文件 Math.h 第 1358 行定义.

static float32_t invsqrt ( float32_t x )

static

x^0.5, x being a complex128_t

Computes inverse square-root of the input

参数

x	input value

返回: x^-0.5

在文件 Math.h 第 495 行定义.

int is_finite ( double f )

static

checks whether a float is finite

在文件 Math.cpp 第 282 行定义.

bool is_generic ( EPrimitiveType * generic ) const

virtualinherited

If the SGSerializable is a class template then TRUE will be returned and GENERIC is set to the type of the generic.

参数

generic set to the type of the generic if returning TRUE

返回: TRUE if a class template.

在文件 SGObject.cpp 第 296 行定义.

int is_infinity ( double f )

static

checks whether a float is infinity

在文件 Math.cpp 第 263 行定义.

int is_nan ( double f )

static

checks whether a float is nan

在文件 Math.cpp 第 250 行定义.

static bool is_sorted ( SGVector< T > vector )

static

Check if vector is sorted

参数

vector input vector

返回: true if vector is sorted, false otherwise

在文件 Math.h 第 1617 行定义.

void linspace	(	float64_t *	output,
		float64_t	start,
		float64_t	end,
		int32_t	n = `100`
	)

static

Builds an array with n linearly spaced elements between start and end.

参数

output	array with linearly spaced elements within the interval
start	beginning of the interval to divide
end	upper bound of the interval to divide
n	number of elements used to divide the interval

在文件 Math.cpp 第 237 行定义.

static float64_t* linspace	(	T	start,
		T	end,
		int32_t	n
	)

static

Returns an array with n linearly spaced elements between start and end.

参数

start	beginning of the interval to divide
end	upper bound of the interval to divide
n	number of elements used to divide the interval

返回: array with linearly spaced elements within the interval

在文件 Math.h 第 1216 行定义.

float64_t* linspace	(	complex128_t	start,
		complex128_t	end,
		int32_t	n
	)

linspace not implemented for complex128_t, returns null instead

在文件 Math.h 第 2322 行定义.

static SGVector<float64_t> linspace_vec	(	T	start,
		T	end,
		int32_t	n
	)

static

Returns a vector with n linearly spaced elements between start and end.

参数

start	beginning of the interval to divide
end	upper bound of the interval to divide
n	number of elements used to divide the interval

返回: vector with linearly spaced elements within the interval

在文件 Math.h 第 1231 行定义.

bool load_serializable	(	CSerializableFile *	file,
		const char *	prefix = `""`
	)

virtualinherited

Load this object from file. If it will fail (returning FALSE) then this object will contain inconsistent data and should not be used!

参数

file	where to load from
prefix	prefix for members

返回: TRUE if done, otherwise FALSE

在文件 SGObject.cpp 第 369 行定义.

void load_serializable_post	(		)
throw	(	ShogunException
	)

protectedvirtualinherited

Can (optionally) be overridden to post-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::LOAD_SERIALIZABLE_POST is called.

异常

ShogunException will be thrown if an error occurs.

被 CKernel, CWeightedDegreePositionStringKernel, CList, CAlphabet, CLinearHMM, CGaussianKernel, CInverseMultiQuadricKernel, CCircularKernel , 以及 CExponentialKernel 重载.

在文件 SGObject.cpp 第 426 行定义.

void load_serializable_pre	(		)
throw	(	ShogunException
	)

protectedvirtualinherited

Can (optionally) be overridden to pre-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::LOAD_SERIALIZABLE_PRE is called.

异常

ShogunException will be thrown if an error occurs.

被 CDynamicArray< T >, CDynamicArray< float64_t >, CDynamicArray< float32_t >, CDynamicArray< int32_t >, CDynamicArray< char >, CDynamicArray< bool > , 以及 CDynamicObjectArray 重载.

在文件 SGObject.cpp 第 421 行定义.

static float64_t log ( float64_t v )

static

Computes natural logarithm input

参数

v input

返回: log base e of v or ln(v)

在文件 Math.h 第 922 行定义.

static float64_t log10 ( float64_t v )

static

Computes logarithm base 10 of input

参数

v input

返回: log base 10 of v

在文件 Math.h 第 897 行定义.

static float64_t log2 ( float64_t v )

static

log10(x), x being a complex128_t

Computes logarithm base 2 of input

参数

v input

返回: log base 2 of v

在文件 Math.h 第 909 行定义.

static T log_mean_exp ( SGVector< T > values )

static

Computes \(\log(\frac{1}{n}\sum_{i=1}^n \exp(x_i))\) for given \(x_i\) using the log-sum-exp trick which avoids numerical problems.

参数

values the vector of \(x_i\)

返回: \(\log(\frac{1}{n}\sum_{i=1}^n \exp(x_i))\)

在文件 Math.h 第 1285 行定义.

static T log_sum_exp ( SGVector< T > values )

static

Computes \(\log(\sum_{i=1}^n \exp(x_i))\) for given \(x_i\) using the log-sum-exp trick which avoids numerical problems.

参数

values the vector of \(x_i\)

返回: \(\log(\sum_{i=1}^n \exp(x_i))\) for given \(x_i\)

在文件 Math.h 第 1242 行定义.

static float64_t logarithmic_sum	(	float64_t	p,
		float64_t	q
	)

static

Sum logarithmic probabilities. Probability measures are summed up but are now given in logspace where direct summation of exp(operand) is not possible due to numerical problems, i.e. eg. exp(-1000)=0. Therefore we do log( exp(a) + exp(b)) = a + log (1 + exp (b-a)) where a = max(p,q) and b min(p,q).

在文件 Math.h 第 1996 行定义.

static T max	(	T	a,
		T	b
	)

static

Returns the greatest element amongst two input values

参数

a	first value
b	second value

返回: maximum value amongst a and b

在文件 Math.h 第 168 行定义.

static T max	(	T *	vec,
		int32_t	len
	)

static

Returns the greatest element in the vector

参数

vec	input vector
len	length of vector

返回: maximum value in the vector

在文件 Math.h 第 226 行定义.

static T min	(	T	a,
		T	b
	)

static

Returns the smallest element amongst two input values

参数

a	first value
b	second value

返回: minimum value amongst a and b

在文件 Math.h 第 157 行定义.

static T min	(	T *	vec,
		int32_t	len
	)

static

Returns the smallest element in the vector

参数

vec	input vector
len	length of vector

返回: minimum value in the vector

在文件 Math.h 第 209 行定义.

void min	(	float64_t *	output,
		T *	index,
		int32_t	size
	)

static

Finds the smallest element in output and puts that element as the first element

参数

output	element array
index	index array
size	size of arrays

在文件 Math.h 第 2302 行定义.

static void min	(	float64_t *	output,
		complex128_t *	index,
		int32_t	size
	)

static

complex128_t cannot be used as index

在文件 Math.h 第 1747 行定义.

static int64_t nchoosek	(	int32_t	n,
		int32_t	k
	)

static

Computes binomial coefficient or all possible combinations of n items taken k at a time.

参数

n	total number of items
k	number of items to be chosen

在文件 Math.h 第 1191 行定义.

void nmin	(	float64_t *	output,
		T *	index,
		int32_t	size,
		int32_t	n
	)

static

Finds the n smallest elements in output and puts these elements as the first n elements

在文件 Math.h 第 2291 行定义.

static void nmin	(	float64_t *	output,
		complex128_t *	index,
		int32_t	size,
		int32_t	n
	)

static

complex128_t cannot be used as index

在文件 Math.h 第 1760 行定义.

static float32_t normal_random	(	float32_t	mean,
		float32_t	std_dev
	)

static

Returns a Gaussian or Normal random number. Using the polar form of the Box-Muller transform. http://en.wikipedia.org/wiki/Box%E2%80%93Muller_transform#Polar_form

在文件 Math.h 第 1095 行定义.

static float64_t normal_random	(	float64_t	mean,
		float64_t	std_dev
	)

static

Returns a Gaussian or Normal random number. Using the polar form of the Box-Muller transform. http://en.wikipedia.org/wiki/Box%E2%80%93Muller_transform#Polar_form

在文件 Math.h 第 1118 行定义.

static void parallel_qsort_index	(	T1 *	output,
		T2 *	index,
		uint32_t	size,
		int32_t	n_threads,
		int32_t	limit = `262144`
	)

static

Performs a quicksort on an array output of length size it is sorted in ascending order (for type T1) and returns the index (type T2) matlab alike [sorted,index]=sort(output) parallel version

参数

output	input array
index	index array
size	size of the array
n_threads	number of threads
limit	sort limit

在文件 Math.h 第 1711 行定义.

static void parallel_qsort_index	(	complex128_t *	output,
		T *	index,
		uint32_t	size,
		int32_t	n_threads,
		int32_t	limit = `0`
	)

static

parallel_qsort_index not implemented for complex128_t

在文件 Math.h 第 1726 行定义.

void * parallel_qsort_index ( void * p )

static

helper function for parallel_qsort_index.

在文件 Math.h 第 2093 行定义.

bool parameter_hash_changed ( )

virtualinherited

返回: whether parameter combination has changed since last update

在文件 SGObject.cpp 第 262 行定义.

static void permute	(	SGVector< T >	v,
		CRandom *	rand = `NULL`
	)

static

Permute randomly the elements of the vector. If provided, use the random object to generate the permutations.

参数

v	the vector to permute.
rand	random object that might be used to generate the permutations.

在文件 Math.h 第 1144 行定义.

static int32_t pow	(	bool	x,
		int32_t	n
	)

static

在文件 Math.h 第 535 行定义.

static int32_t pow	(	int32_t	x,
		int32_t	n
	)

static

参数

x	base (integer)
n	exponent (integer)

在文件 Math.h 第 544 行定义.

static float64_t pow	(	float64_t	x,
		int32_t	n
	)

static

参数

x	base (decimal)
n	exponent (integer)

在文件 Math.h 第 558 行定义.

static float64_t pow	(	float64_t	x,
		float64_t	n
	)

static

参数

x	base (decimal)
n	exponent (decimal)

在文件 Math.h 第 576 行定义.

static complex128_t pow	(	complex128_t	x,
		int32_t	n
	)

static

参数

x	base (complex)
n	exponent (integer)

在文件 Math.h 第 585 行定义.

static complex128_t pow	(	complex128_t	x,
		complex128_t	n
	)

static

参数

x	base (complex)
n	exponent (complex)

在文件 Math.h 第 594 行定义.

static complex128_t pow	(	complex128_t	x,
		float64_t	n
	)

static

参数

x	base (complex)
n	exponent (decimal)

在文件 Math.h 第 603 行定义.

static complex128_t pow	(	float64_t	x,
		complex128_t	n
	)

static

参数

x	base (decimal)
n	exponent (complex)

在文件 Math.h 第 612 行定义.

static floatmax_t powl	(	floatmax_t	x,
		floatmax_t	n
	)

static

Computes x raised to the power n

参数

x	base
n	exponent

返回: x^n

在文件 Math.h 第 524 行定义.

void print_modsel_params ( )

inherited

prints all parameter registered for model selection and their type

在文件 SGObject.cpp 第 474 行定义.

void print_serializable ( const char * prefix = "" )

virtualinherited

prints registered parameters out

参数

prefix prefix for members

在文件 SGObject.cpp 第 308 行定义.

static void qsort	(	T *	output,
		int32_t	size
	)

static

Performs a quicksort on an array output of length size it is sorted from in ascending (for type T)

参数

output	array to be sorted
size	size of array

在文件 Math.h 第 1313 行定义.

static void qsort	(	T **	vector,
		index_t	length
	)

static

Performs a quicksort on an array of pointers. It is sorted from in ascending (for type T) Every element is dereferenced once before being compared

参数

vector	array of pointers to sort
length	length of array

在文件 Math.h 第 1520 行定义.

static void qsort	(	complex128_t **	vector,
		index_t	length
	)

static

qsort not implemented for complex128_t

在文件 Math.h 第 1559 行定义.

static void qsort ( SGVector< T > vector )

static

Quicksort the vector in ascending order (for type T)

参数

vector vector to be sorted

在文件 Math.h 第 1568 行定义.

void qsort_backward_index	(	T1 *	output,
		T2 *	index,
		int32_t	size
	)

static

Performs a quicksort on an array output of length size it is sorted in descending order (for type T1) and returns the index (type T2) matlab alike [sorted,index]=sort(output)

参数

output	array to be sorted
index	index array
size	size of array

在文件 Math.h 第 2246 行定义.

static void qsort_backword_index	(	complex128_t *	output,
		T *	index,
		uint32_t	size
	)

static

qsort_backword_index not implemented for complex128_t

在文件 Math.h 第 1692 行定义.

void qsort_index	(	T1 *	output,
		T2 *	index,
		uint32_t	size
	)

static

Performs a quicksort on an array output of length size it is sorted in ascending order (for type T1) and returns the index (type T2) matlab alike [sorted,index]=sort(output)

参数

output	array to be sorted
index	index array
size	size of arrays

在文件 Math.h 第 2202 行定义.

static void qsort_index	(	complex128_t *	output,
		T *	index,
		uint32_t	size
	)

static

qsort_index not implemented for complex128_t

在文件 Math.h 第 1673 行定义.

static void radix_sort	(	T *	array,
		int32_t	size
	)

static

Performs a in-place radix sort in ascending order

参数

array	array to be sorted
size	size of array

在文件 Math.h 第 1378 行定义.

static void radix_sort_helper	(	T *	array,
		int32_t	size,
		uint16_t	i
	)

static

Helper function for radix sort.

参数

array	array to be sorted
size	size of array
i	index

在文件 Math.h 第 1409 行定义.

static void radix_sort_helper	(	complex128_t *	array,
		int32_t	size,
		uint16_t	i
	)

static

radix_sort_helper not implemented for complex128_t

在文件 Math.h 第 1508 行定义.

static float64_t randn_double ( )

static

Convenience method for generating Standard Normal random numbers Double: Mean = 0 and Standard Deviation = 1

在文件 Math.h 第 1132 行定义.

static float32_t randn_float ( )

static

Convenience method for generating Standard Normal random numbers Float: Mean = 0 and Standard Deviation = 1

在文件 Math.h 第 1125 行定义.

static uint64_t random ( )

static

Returns random number

返回: unsigned 64 bit integer

在文件 Math.h 第 1019 行定义.

static uint64_t random	(	uint64_t	min_value,
		uint64_t	max_value
	)

static

Returns random number

返回: unsigned 64 bit integer

在文件 Math.h 第 1027 行定义.

static int64_t random	(	int64_t	min_value,
		int64_t	max_value
	)

static

Returns random number between minimum and maximum value

参数

min_value	minimum value (64 bit integer)
max_value	maximum value (64 bit integer)

返回: signed 64 bit integer

在文件 Math.h 第 1037 行定义.

static uint32_t random	(	uint32_t	min_value,
		uint32_t	max_value
	)

static

Returns random number between minimum and maximum value

参数

min_value	minimum value (32 bit unsigned integer)
max_value	maximum value (32 bit unsigned integer)

返回: unsigned 32 bit integer

在文件 Math.h 第 1047 行定义.

static int32_t random	(	int32_t	min_value,
		int32_t	max_value
	)

static

Returns random number between minimum and maximum value

参数

min_value	minimum value (32 bit signed integer)
max_value	maximum value (32 bit signed integer)

返回: signed 32 bit integer

在文件 Math.h 第 1057 行定义.

static float32_t random	(	float32_t	min_value,
		float32_t	max_value
	)

static

Returns random number between minimum and maximum value

参数

min_value	minimum value (32 bit float)
max_value	maximum value (32 bit float)

返回: 32 bit float

在文件 Math.h 第 1067 行定义.

static float64_t random	(	float64_t	min_value,
		float64_t	max_value
	)

static

Returns random number between minimum and maximum value

参数

min_value	minimum value (64 bit float)
max_value	maximum value (64 bit float)

返回: 64 bit float

在文件 Math.h 第 1077 行定义.

static floatmax_t random	(	floatmax_t	min_value,
		floatmax_t	max_value
	)

static

Returns random number between minimum and maximum value

参数

min_value	minimum value (128 bit float)
max_value	maximum value (128 bit float)

返回: 128 bit float

在文件 Math.h 第 1087 行定义.

static float64_t real ( complex128_t c )

static

Returns real part of a complex128_t number

参数

c	complex number

返回: real part of the complex number

在文件 Math.h 第 1916 行定义.

static float64_t round ( float64_t d )

static

Rounds off the input value to it's nearest integer (as a floating-point value)

参数

d	input decimal value

返回: rounded off value

在文件 Math.h 第 398 行定义.

bool save_serializable	(	CSerializableFile *	file,
		const char *	prefix = `""`
	)

virtualinherited

Save this object to file.

参数

file	where to save the object; will be closed during returning if PREFIX is an empty string.
prefix	prefix for members

返回: TRUE if done, otherwise FALSE

在文件 SGObject.cpp 第 314 行定义.

void save_serializable_post	(		)
throw	(	ShogunException
	)

protectedvirtualinherited

Can (optionally) be overridden to post-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::SAVE_SERIALIZABLE_POST is called.

异常

ShogunException will be thrown if an error occurs.

被 CKernel 重载.

在文件 SGObject.cpp 第 436 行定义.

void save_serializable_pre	(		)
throw	(	ShogunException
	)

protectedvirtualinherited

Can (optionally) be overridden to pre-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::SAVE_SERIALIZABLE_PRE is called.

异常

ShogunException will be thrown if an error occurs.

被 CKernel, CDynamicArray< T >, CDynamicArray< float64_t >, CDynamicArray< float32_t >, CDynamicArray< int32_t >, CDynamicArray< char >, CDynamicArray< bool > , 以及 CDynamicObjectArray 重载.

在文件 SGObject.cpp 第 431 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 41 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 46 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 51 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 56 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 61 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 66 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 71 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 76 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 81 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 86 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 91 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 96 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 101 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 106 行定义.

void set_generic ( )

inherited

在文件 SGObject.cpp 第 111 行定义.

void set_generic ( )

inherited

set generic type to T

void set_global_io ( SGIO * io )

inherited

set the io object

参数

io	io object to use

在文件 SGObject.cpp 第 228 行定义.

void set_global_parallel ( Parallel * parallel )

inherited

set the parallel object

参数

parallel parallel object to use

在文件 SGObject.cpp 第 241 行定义.

void set_global_version ( Version * version )

inherited

set the version object

参数

version version object to use

在文件 SGObject.cpp 第 283 行定义.

CSGObject * shallow_copy ( ) const

virtualinherited

A shallow copy. All the SGObject instance variables will be simply assigned and SG_REF-ed.

被 CGaussianKernel 重载.

在文件 SGObject.cpp 第 192 行定义.

static T sign ( T a )

static

Signum of input value

参数

a	input value

返回: 1 if a>0, -1 if a<0

在文件 Math.h 第 426 行定义.

static float64_t sin ( float64_t x )

static

tanh(x), x being a complex128_t

Computes sine of input

参数

x input

返回: sin(x)

在文件 Math.h 第 820 行定义.

static float64_t sinh ( float64_t x )

static

asin(x), x being a complex128_t not implemented

Computes hyperbolic sine of input

参数

x input

返回: sinh(x)

在文件 Math.h 第 844 行定义.

void sort	(	int32_t *	a,
		int32_t	cols,
		int32_t	sort_col = `0`
	)

static

Performs a bubblesort on a given matrix a. it is sorted in ascending order from top to bottom and left to right

参数

a	matrix to be sorted
cols	number of columns
sort_col

在文件 Math.cpp 第 155 行定义.

void sort	(	float64_t *	a,
		int32_t *	idx,
		int32_t	N
	)

static

Performs a bubblesort on a given array a. it is sorted in ascending order from left to right

参数

a	array to be sorted
idx	index array
N	length of array

在文件 Math.cpp 第 175 行定义.

static T sq ( T x )

static

Computes square of the input

参数

x	input value

返回: x*x (x^2)

在文件 Math.h 第 450 行定义.

static float32_t sqrt ( float32_t x )

static

Computes square-root of the input

参数

x	input value

返回: x^0.5

在文件 Math.h 第 459 行定义.

static float64_t sqrt ( float64_t x )

static

Computes square-root of the input

参数

x	input value

返回: x^0.5

在文件 Math.h 第 468 行定义.

static floatmax_t sqrt ( floatmax_t x )

static

Computes square-root of the input

参数

x	input value

返回: x^0.5

在文件 Math.h 第 477 行定义.

bool strtod	(	const char *	str,
		float64_t *	double_result
	)

static

Converts string to double

参数

str	input string
double_result	double pointer

返回: returns true if successful, else returns false

在文件 Math.cpp 第 328 行定义.

bool strtof	(	const char *	str,
		float32_t *	float_result
	)

static

Converts string to float

参数

str	input string
float_result	float pointer

返回: returns true if successful, else returns false

在文件 Math.cpp 第 297 行定义.

bool strtold	(	const char *	str,
		floatmax_t *	long_double_result
	)

static

Converts string to long double

参数

str	input string
long_double_result	long double pointer

返回: returns true if successful, else returns false

在文件 Math.cpp 第 359 行定义.

static void swap	(	T &	a,
		T &	b
	)

static

Swaps a and b

参数

a	first input value
b	second input value

在文件 Math.h 第 438 行定义.

static float64_t tan ( float64_t x )

static

Computes tangent of input

参数

x input

返回: tan(x)

在文件 Math.h 第 771 行定义.

static float64_t tanh ( float64_t x )

static

atan2(x), x being a complex128_t not implemented

Computes hyperbolic tangent of input

参数

x input

返回: tanh(x)

在文件 Math.h 第 808 行定义.

void unset_generic ( )

inherited

unset generic type

this has to be called in classes specializing a template class

在文件 SGObject.cpp 第 303 行定义.

void update_parameter_hash ( )

virtualinherited

Updates the hash of current parameter combination

在文件 SGObject.cpp 第 248 行定义.

类成员变量说明

const float64_t ALMOST_INFTY = +1e+300

static

在文件 Math.h 第 2049 行定义.

const float64_t ALMOST_NEG_INFTY = -1e+300

static

almost neg (log) infinity

在文件 Math.h 第 2052 行定义.

const float32_t F_MAX_VAL32 =FLT_MAX

static

在文件 Math.h 第 2065 行定义.

const float64_t F_MAX_VAL64 =DBL_MAX

static

在文件 Math.h 第 2067 行定义.

const float32_t F_MIN_NORM_VAL32 =FLT_MIN

static

在文件 Math.h 第 2066 行定义.

const float64_t F_MIN_NORM_VAL64 =DBL_MIN

static

在文件 Math.h 第 2068 行定义.

const float32_t F_MIN_VAL32 =(FLT_MIN * FLT_EPSILON)

static

在文件 Math.h 第 2071 行定义.

const float64_t F_MIN_VAL64 =(DBL_MIN * DBL_EPSILON)

static

在文件 Math.h 第 2072 行定义.

const float64_t INFTY = INFINITY

static

infinity

在文件 Math.h 第 2048 行定义.

SGIO* io

inherited

io

在文件 SGObject.h 第 369 行定义.

int32_t LOGRANGE = 0

staticprotected

range for logtable: log(1+exp(x)) -LOGRANGE <= x <= 0

在文件 Math.h 第 2076 行定义.

Parameter* m_gradient_parameters

inherited

parameters wrt which we can compute gradients

在文件 SGObject.h 第 384 行定义.

uint32_t m_hash

inherited

Hash of parameter values

在文件 SGObject.h 第 387 行定义.

Parameter* m_model_selection_parameters

inherited

model selection parameters

在文件 SGObject.h 第 381 行定义.

Parameter* m_parameters

inherited

parameters

在文件 SGObject.h 第 378 行定义.

const float64_t MACHINE_EPSILON =DBL_EPSILON

static

Machine epsilon for float64_t

在文件 Math.h 第 2058 行定义.

const float64_t MAX_REAL_NUMBER =DBL_MAX

static

在文件 Math.h 第 2061 行定义.

const float64_t MIN_REAL_NUMBER =DBL_MIN

static

在文件 Math.h 第 2062 行定义.

const float64_t NOT_A_NUMBER = NAN

static

not a number

在文件 Math.h 第 2046 行定义.

Parallel* parallel

inherited

parallel

在文件 SGObject.h 第 372 行定义.

const float64_t PI =M_PI

static

The number pi

在文件 Math.h 第 2055 行定义.

uint32_t seed = 0

staticprotected

random generator seed

在文件 Math.h 第 2079 行定义.

Version* version

inherited

version

在文件 SGObject.h 第 375 行定义.

该类的文档由以下文件生成:

详细描述

类

Public 成员函数

静态 Public 成员函数

Public 属性

Protected 成员函数

constants

构造及析构函数说明

成员函数说明

类成员变量说明