std::valarray

 

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Génériques des opérations numériques Original: Generic numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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std::valarray

Les fonctions membres Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
valarray::valarray valarray::~valarray valarray::operator= valarray::operator[] valarray::swap valarray::size valarray::resize valarray::sum valarray::min valarray::max valarray::shift valarray::cshift valarray::apply	valarray::operator+ valarray::operator- valarray::operator~ valarray::operator! valarray::operator+= valarray::operator-= valarray::operator*= valarray::operator/= valarray::operator%= valarray::operator&= valarray::operator|= valarray::operator^= valarray::operator<<= valarray::operator>>=
Tiers fonctions Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
swap (C++11) begin (C++11) end (C++11) abs exp log log10 pow sqrt sin cos tan asin acos atan atan2 sinh cosh tanh	operator* operator/ operator% operator+ operator- operator^ None operator& operator| operator<< operator>> operator&& operator None operator== operator!= operator< operator> operator<= operator>=
Classes d'aide Original: Helper classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
slice_array gslice_array indirect_array	slice gslice mask_array

 

Déclaré dans l'en-tête <valarray>
template<class T > class valarray;

std::valarray est la classe qui représente et permet de manipuler des tableaux de valeurs. Il prend en charge des opérations mathématiques et diverses formes d'opérateurs utilisables sur l'ensemble du tableau, sur une tranche (slice) et en accès indirect .

Original:

std::valarray is the class for representing and manipulating arrays of values. It supports element-wise mathematical operations and various forms of generalized subscript operators, slicing and indirect access.

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Notes

Les classes std::valarray et aide sont définis pour être à l'abri de certaines formes de l'aliasing, ce qui permet des opérations sur ces classes d'optimiser semblable à l'effet du mot-clé restrict dans le langage de programmation C. En outre, les fonctions et les opérateurs qui prennent des arguments valarray sont autorisés à retourner des objets proxy pour permettre au compilateur d'optimiser une expression telle que v1 = a*v2 + v3; comme une simple boucle qui exécute v1[i]= a*v2[i]+ v3[i]; éviter toute temporaires ou des passes multiples. Toutefois, modèles d'expression faire la même technique d'optimisation disponibles pour chaque conteneur C + +, et la majorité des bibliothèques numériques préfère modèles d'expression de valarrays de flexibilité. Certaines implémentations C + + bibliothèque standard utilisent des modèles d'expression pour mettre en œuvre des opérations efficaces sur std::valarray (par exemple libstdc + + GNU libc et LLVM + +), et rarement valarrays sont optimisés plus loin, par exemple, dans Intel Parallel Studio .

Original:

std::valarray and helper classes are defined to be free of certain forms of aliasing, thus allowing operations on these classes to be optimized similar to the effect of the keyword restrict in the C programming language. In addition, functions and operators that take valarray arguments are allowed to return proxy objects to make it possible for the compiler to optimize an expression such as v1 = a*v2 + v3; as a single loop that executes v1[i]= a*v2[i]+ v3[i]; avoiding any temporaries or multiple passes. However, modèles d'expression make the same optimization technique available for any C++ container, and the majority of numeric libraries prefer expression templates to valarrays for flexibility. Some C++ standard library implementations use expression templates to implement efficient operations on std::valarray (e.g. GNU libstdc++ and LLVM libc++), and only rarely valarrays are optimized any further, e.g. in Intel Parallel Studio.

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Types de membres

Type du membre	Définition
value_type	T

Fonctions membres

(constructeur)	construit une nouvelle matrice numérique Original: constructs new numeric array The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
(destructeur)	Détruit le tableau numérique Original: destructs the numeric array The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
operator=	affecte le contenu Original: assigns the contents The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
operator[]	get / set élément valarray, tranche, ou un masque Original: get/set valarray element, slice, or mask The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
operator+ operator- operator~ operator!	applique un opérateur arithmétique unaire pour chaque élément de la valarray Original: applies a unary arithmetic operator to each element of the valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
operator+= operator-= operator*= operator/= operator%= operator&= operator|= operator^= operator<<= operator>>=	s'applique opérateur d'affectation composé à chaque élément de la valarray Original: applies compound assignment operator to each element of the valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
swap	swaps avec une autre valarray Original: swaps with another valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
size	renvoie la taille du valarray Original: returns the size of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
resize	modifie la taille du valarray Original: changes the size of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
sum	calcule la somme de tous les éléments Original: calculates the sum of all elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
min	retourne le plus petit élément Original: returns the smallest element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
max	retourne le plus grand élément Original: returns the largest element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
shift	zéro de remplissage déplacer les éléments de la valarray Original: zero-filling shift the elements of the valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
cshift	décalage circulaire des éléments de la valarray Original: circular shift of the elements of the valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique)
apply	applies a function to every element of a valarray (fonction membre publique)

Fonctions annexes

std::swap(std::valarray) (C++11)	l'algorithme spécialisé std::swap() Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
std::begin(std::valarray) (C++11)	std::begin spécialisée Original: specializes std::begin The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
std::end(std::valarray) (C++11)	std::end spécialisée Original: specializes std::end The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
operator+ operator- operator* operator/ operator% operator& operator| operator^ operator<< operator>> operator&& operator||	des opérateurs binaires s'applique à chaque élément de valarrays deux, ou un valarray et une valeur Original: applies binary operators to each element of two valarrays, or a valarray and a value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
operator== operator!= operator< operator<= operator> operator>=	compare deux valarrays ou un valarray avec une valeur Original: compares two valarrays or a valarray with a value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
abs(std::valarray)	applique la fonction std::abs à chaque élément de valarray Original: applies the function std::abs to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
Les fonctions exponentielles Original: Exponential functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
exp(std::valarray)	applique la fonction std::exp à chaque élément de valarray Original: applies the function std::exp to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
log(std::valarray)	applique la fonction std::log à chaque élément de valarray Original: applies the function std::log to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
log10(std::valarray)	applique la fonction std::log10 à chaque élément de valarray Original: applies the function std::log10 to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
Les fonctions de puissance Original: Power functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
pow(std::valarray)	applique la fonction à deux std::pow valarrays ou un valarray et une valeur Original: applies the function std::pow to two valarrays or a valarray and a value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
sqrt(std::valarray)	applique la fonction std::sqrt à chaque élément de valarray Original: applies the function std::sqrt to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
Les fonctions trigonométriques Original: Trigonometric functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sin(std::valarray)	applique la fonction std::sin à chaque élément de valarray Original: applies the function std::sin to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
cos(std::valarray)	applique la fonction std::cos à chaque élément de valarray Original: applies the function std::cos to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
tan(std::valarray)	applique la fonction std::tan à chaque élément de valarray Original: applies the function std::tan to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
asin(std::valarray)	applique la fonction std::asin à chaque élément de valarray Original: applies the function std::asin to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
acos(std::valarray)	applique la fonction std::acos à chaque élément de valarray Original: applies the function std::acos to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
atan(std::valarray)	applique la fonction std::atan à chaque élément de valarray Original: applies the function std::atan to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
atan2(std::valarray)	applique la fonction de std::atan2 un valarray et une valeur Original: applies the function std::atan2 to a valarray and a value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
Fonctions hyperboliques Original: Hyperbolic functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sinh(std::valarray)	applique la fonction std::sinh à chaque élément de valarray Original: applies the function std::sinh to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
cosh(std::valarray)	applique la fonction std::cosh à chaque élément de valarray Original: applies the function std::cosh to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
tanh(std::valarray)	applique la fonction std::tanh à chaque élément de valarray Original: applies the function std::tanh to each element of valarray The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)

Classes d'aide

slice	BLAS-like tranche d'un valarray: indice de départ, la longueur de foulée Original: BLAS-like slice of a valarray: starting index, length, stride The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe)
slice_array	procuration d'un sous-ensemble d'un valarray après l'application d'une tranche Original: proxy to a subset of a valarray after applying a slice The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe générique)
gslice	tranche généralisée d'une valarray: indice de départ, un ensemble de longueurs, jeu de progrès Original: generalized slice of a valarray: starting index, set of lengths, set of strides The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe)
gslice_array	procuration d'un sous-ensemble d'un valarray après l'application d'une GSlice Original: proxy to a subset of a valarray after applying a gslice The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe générique)
mask_array	procuration d'un sous-ensemble d'un valarray après l'application d'un opérateur booléen masque [] Original: proxy to a subset of a valarray after applying a boolean mask operator[] The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe générique)
indirect_array	procuration d'un sous-ensemble d'un valarray après l'application de l'opérateur indirect [] Original: proxy to a subset of a valarray after applying indirect operator[] The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe générique)