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    std::valarray

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    <metanoindex/>

     
    C++
     
    Bibliothque Numerics
    Fonctions mathmatiques courantes
    Virgule flottante environnement
    Nombres complexes
    Tableaux numriques
    La gnration de nombres pseudo-alatoires
    Moment de la compilation arithmtique rationnelle (C++11)
    Gnriques des oprations numriques
    Original:
    Generic numeric operations
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    iota (C++11)
    accumulate
    inner_product
    adjacent_difference
    partial_sum
     
    std::valarray
    Les fonctions membres
    Original:
    Member functions
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    Tiers fonctions
    Original:
    Non-member functions
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    Classes d'aide
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    Helper classes
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    <tbody> </tbody>
    Dclar dans l'en-tte <valarray>
    template< class T > class valarray;
    std::valarray est la classe qui reprsente et permet de manipuler des tableaux de valeurs. Il prend en charge des oprations mathmatiques et diverses formes d'oprateurs utilisables sur l'ensemble du tableau, sur une tranche (slice) et en accs 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 dfinis pour tre l'abri de certaines formes de l'aliasing, ce qui permet des oprations sur ces classes d'optimiser semblable l'effet du mot-cl restrict dans le langage de programmation C. En outre, les fonctions et les oprateurs qui prennent des arguments valarray sont autoriss retourner des objets proxy pour permettre au compilateur d'optimiser une expression telle que v1 = a*v2 + v3; comme une simple boucle qui excute v1[i] = a*v2[i] + v3[i]; viter toute temporaires ou des passes multiples. Toutefois, modles d'expression faire la mme technique d'optimisation disponibles pour chaque conteneur C + +, et la majorit des bibliothques numriques prfre modles d'expression de valarrays de flexibilit. Certaines implmentations C + + bibliothque standard utilisent des modles d'expression pour mettre en uvre des oprations efficaces sur std::valarray (par exemple libstdc + + GNU libc et LLVM + +), et rarement valarrays sont optimiss 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, modles 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 Dfinition
    value_type T

    Fonctions membres
    construit une nouvelle matrice numrique
    Original:
    constructs new numeric array
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    (fonction membre publique) [edit]
    Dtruit le tableau numrique
    Original:
    destructs the numeric array
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    (fonction membre publique) [edit]
    affecte le contenu
    Original:
    assigns the contents
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    (fonction membre publique) [edit]
    get / set lment valarray, tranche, ou un masque
    Original:
    get/set valarray element, slice, or mask
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    (fonction membre publique) [edit]
    applique un oprateur arithmtique unaire pour chaque lment de la valarray
    Original:
    applies a unary arithmetic operator to each element of the valarray
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    (fonction membre publique) [edit]
    s'applique oprateur d'affectation compos chaque lment de la valarray
    Original:
    applies compound assignment operator to each element of the valarray
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    (fonction membre publique) [edit]
    swaps avec une autre valarray
    Original:
    swaps with another valarray
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    (fonction membre publique) [edit]
    renvoie la taille du valarray
    Original:
    returns the size of valarray
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    (fonction membre publique) [edit]
    modifie la taille du valarray
    Original:
    changes the size of valarray
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    (fonction membre publique) [edit]
    calcule la somme de tous les lments
    Original:
    calculates the sum of all elements
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    (fonction membre publique) [edit]
    retourne le plus petit lment
    Original:
    returns the smallest element
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    (fonction membre publique) [edit]
    retourne le plus grand lment
    Original:
    returns the largest element
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    (fonction membre publique) [edit]
    zro de remplissage dplacer les lments de la valarray
    Original:
    zero-filling shift the elements of the valarray
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    (fonction membre publique) [edit]
    dcalage circulaire des lments de la valarray
    Original:
    circular shift of the elements of the valarray
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    (fonction membre publique) [edit]
    		applies a function to every element of a valarray
    (fonction membre publique) [edit]

    Fonctions annexes

    (C++11)
    l'algorithme spcialis std::swap()
    Original:
    specializes the std::swap() algorithm
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    (fonction gnrique) [edit]
    (C++11)
    std::begin spcialise
    Original:
    specializes std::begin
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    (fonction gnrique) [edit]
    (C++11)
    std::end spcialise
    Original:
    specializes std::end
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    (fonction gnrique) [edit]
    des oprateurs binaires s'applique chaque lment 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
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    (fonction gnrique) [edit]
    compare deux valarrays ou un valarray avec une valeur
    Original:
    compares two valarrays or a valarray with a value
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    (fonction gnrique) [edit]
    applique la fonction std::abs chaque lment de valarray
    Original:
    applies the function std::abs to each element of valarray
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    (fonction gnrique) [edit]
    Les fonctions exponentielles
    Original:
    Exponential functions
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    applique la fonction std::exp chaque lment de valarray
    Original:
    applies the function std::exp to each element of valarray
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    (fonction gnrique) [edit]
    applique la fonction std::log chaque lment de valarray
    Original:
    applies the function std::log to each element of valarray
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    (fonction gnrique) [edit]
    applique la fonction std::log10 chaque lment de valarray
    Original:
    applies the function std::log10 to each element of valarray
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    (fonction gnrique) [edit]
    Les fonctions de puissance
    Original:
    Power functions
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    applique la fonction 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
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    (fonction gnrique) [edit]
    applique la fonction std::sqrt chaque lment de valarray
    Original:
    applies the function std::sqrt to each element of valarray
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    (fonction gnrique) [edit]
    Les fonctions trigonomtriques
    Original:
    Trigonometric functions
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    applique la fonction std::sin chaque lment de valarray
    Original:
    applies the function std::sin to each element of valarray
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    (fonction gnrique) [edit]
    applique la fonction std::cos chaque lment de valarray
    Original:
    applies the function std::cos to each element of valarray
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    (fonction gnrique) [edit]
    applique la fonction std::tan chaque lment de valarray
    Original:
    applies the function std::tan to each element of valarray
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    (fonction gnrique) [edit]
    applique la fonction std::asin chaque lment de valarray
    Original:
    applies the function std::asin to each element of valarray
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    (fonction gnrique) [edit]
    applique la fonction std::acos chaque lment de valarray
    Original:
    applies the function std::acos to each element of valarray
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    (fonction gnrique) [edit]
    applique la fonction std::atan chaque lment de valarray
    Original:
    applies the function std::atan to each element of valarray
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    (fonction gnrique) [edit]
    applique la fonction de std::atan2 un valarray et une valeur
    Original:
    applies the function std::atan2 to a valarray and a value
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    (fonction gnrique) [edit]
    Fonctions hyperboliques
    Original:
    Hyperbolic functions
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    applique la fonction std::sinh chaque lment de valarray
    Original:
    applies the function std::sinh to each element of valarray
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    (fonction gnrique) [edit]
    applique la fonction std::cosh chaque lment de valarray
    Original:
    applies the function std::cosh to each element of valarray
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    (fonction gnrique) [edit]
    applique la fonction std::tanh chaque lment de valarray
    Original:
    applies the function std::tanh to each element of valarray
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    (fonction gnrique) [edit]

    Classes d'aide
    BLAS-like tranche d'un valarray: indice de dpart, la longueur de foule
    Original:
    BLAS-like slice of a valarray: starting index, length, stride
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    (classe) [edit]
    procuration d'un sous-ensemble d'un valarray aprs l'application d'une tranche
    Original:
    proxy to a subset of a valarray after applying a slice
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    (classe gnrique) [edit]
    tranche gnralise d'une valarray: indice de dpart, un ensemble de longueurs, jeu de progrs
    Original:
    generalized slice of a valarray: starting index, set of lengths, set of strides
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    (classe) [edit]
    procuration d'un sous-ensemble d'un valarray aprs l'application d'une GSlice
    Original:
    proxy to a subset of a valarray after applying a gslice
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    (classe gnrique) [edit]
    procuration d'un sous-ensemble d'un valarray aprs l'application d'un oprateur boolen masque []
    Original:
    proxy to a subset of a valarray after applying a boolean mask operator[]
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    (classe gnrique) [edit]
    procuration d'un sous-ensemble d'un valarray aprs l'application de l'oprateur indirect []
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    proxy to a subset of a valarray after applying indirect operator[]
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    (classe gnrique) [edit]
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