Namespace
Varianti

std::valarray

Da cppreference.com.
< cpp‎ | numeric

 
 
Numeri libreria
Comuni funzioni matematiche
Virgola mobile ambiente
I numeri complessi
Array numerici
Pseudo-casuale generazione
In fase di compilazione aritmetica razionale (C++11)
Generici operazioni numeriche
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.
iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
std::valarray
 
Defined in header <valarray>
template< class T >
class valarray;
std::valarray è la classe per la rappresentazione e la manipolazione di array di valori. Supporta operazioni matematiche elemento-saggi e varie forme di generalizzate operatori pedice, affettare e accesso indiretto.
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.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Indice

[modifica] Note

Classi helper std::valarray e sono definiti per essere liberi di certe forme di aliasing, consentendo in tal modo le operazioni su queste classi di ottimizzare simile all'effetto della parola chiave restrict nel linguaggio di programmazione C. Inoltre, le funzioni e gli operatori che accettano argomenti valarray sono permesso di tornare oggetti proxy per rendere possibile per il compilatore di ottimizzare espressioni quali v1 = a*v2 + v3; come un ciclo unico che esegue v1[i] = a*v2[i] + v3[i]; evitando provvisori o più passaggi. Tuttavia, espressione modelli fare la stessa tecnica di ottimizzazione disponibili per qualsiasi contenitore C + +, e la maggior parte delle librerie di modelli numerici preferiscono espressione di valarrays di flessibilità. Alcune implementazioni della libreria C + + standard, utilizzare i modelli di espressione per implementare operazioni efficienti sul std::valarray (ad esempio GNU libstdc + + e LLVM libc + +), e solo raramente valarrays sono ottimizzati ulteriormente, ad esempio, in 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, espressione modelli 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.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[modifica] Membri tipi

Membro tipo
Original:
Member type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Definition
value_type T

[modifica] Membri funzioni

costruisce nuova matrice numerica
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.

(membro pubblico funzione) [edit]
distrugge la matrice numerica
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.

(membro pubblico funzione) [edit]
assegna il contenuto
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.

(membro pubblico funzione) [edit]
get / set elemento valarray, fetta, o maschera
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.

(membro pubblico funzione) [edit]
applica un operatore unario aritmetica per ogni elemento del 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.

(membro pubblico funzione) [edit]
vale assegnazione operatore composto ad ogni elemento della 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.

(membro pubblico funzione) [edit]
swap con un'altra 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.

(membro pubblico funzione) [edit]
restituisce la dimensione di 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.

(membro pubblico funzione) [edit]
cambia le dimensioni del 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.

(membro pubblico funzione) [edit]
calcola la somma di tutti gli elementi
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.

(membro pubblico funzione) [edit]
restituisce l'elemento più piccolo
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.

(membro pubblico funzione) [edit]
restituisce l'elemento più grande
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.

(membro pubblico funzione) [edit]
zero-riempimento spostare gli elementi del 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.

(membro pubblico funzione) [edit]
shift circolare degli elementi del 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.

(membro pubblico funzione) [edit]
applies a function to every element of a valarray
(membro pubblico funzione) [edit]

[modifica] Non membri funzioni

specializzata l'algoritmo 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.

(funzione di modello) [edit]
specializzata std::begin
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.

(funzione di modello) [edit]
specializzata std::end
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.

(funzione di modello) [edit]
vale operatori binari a ciascun elemento di due valarrays, o un valarray e un valore
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.

(funzione di modello) [edit]
confronta due valarrays o un valarray con un valore
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.

(funzione di modello) [edit]
applica la std::abs funzione a ogni elemento di 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.

(funzione di modello) [edit]
Funzioni esponenziali
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.
applica la std::exp funzione a ogni elemento di 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.

(funzione di modello) [edit]
applica la std::log funzione a ogni elemento di 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.

(funzione di modello) [edit]
applica la std::log10 funzione a ogni elemento di 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.

(funzione di modello) [edit]
Funzioni di risparmio energia
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.
applica la std::pow funzione a due valarrays o un valarray e un valore
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.

(funzione di modello) [edit]
applica la std::sqrt funzione a ogni elemento di 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.

(funzione di modello) [edit]
Funzioni trigonometriche
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.
applica la std::sin funzione a ogni elemento di 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.

(funzione di modello) [edit]
applica la std::cos funzione a ogni elemento di 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.

(funzione di modello) [edit]
applica la std::tan funzione a ogni elemento di 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.

(funzione di modello) [edit]
applica la std::asin funzione a ogni elemento di 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.

(funzione di modello) [edit]
applica la std::acos funzione a ogni elemento di 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.

(funzione di modello) [edit]
applica la std::atan funzione a ogni elemento di 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.

(funzione di modello) [edit]
applica la funzione di un std::atan2 valarray e un valore
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.

(funzione di modello) [edit]
Funzioni iperboliche
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.
applica la std::sinh funzione a ogni elemento di 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.

(funzione di modello) [edit]
applica la std::cosh funzione a ogni elemento di 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.

(funzione di modello) [edit]
applica la std::tanh funzione a ogni elemento di 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.

(funzione di modello) [edit]

[modifica] Helper classi

BLAS-come una fetta di valarray: indice iniziale, lunghezza, passo
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) [edit]
proxy per un sottoinsieme di un valarray dopo l'applicazione di una fetta
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 template) [edit]
fetta generalizzata di un valarray: indice iniziale, set di lunghezze, serie di passi
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) [edit]
proxy per un sottoinsieme di un valarray dopo aver applicato un 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 template) [edit]
proxy per un sottoinsieme di un valarray dopo l'applicazione di un operatore booleano maschera []
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 template) [edit]
proxy per un sottoinsieme di un valarray dopo l'applicazione dell'operatore indiretta []
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 template) [edit]