# std::atan2<div class="t-tr-text">(Std :: valarray)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">(std::valarray)</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

< cpp‎ | numeric‎ | valarray

Bibliothèque Numerics
Fonctions mathématiques courantes
Virgule flottante environnement
Nombres complexes
Tableaux numériques
La génération de nombres pseudo-aléatoires
Moment de la compilation arithmétique rationnelle (C++11)
Génériques des opérations numériques
Original:
Generic numeric operations
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 iota (C++11)
 accumulate
 inner_product
 partial_sum

`std::valarray`
Les fonctions membres
Original:
Member functions
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 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
Tiers fonctions
Original:
Non-member functions
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 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
Classes d'aide
Original:
Helper classes
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 slice_array
 gslice_array
 indirect_array
 slice
 gslice

 Defined in header template< class T > valarray atan2( const valarray& y, const valarray& x ); (1) template< class T > valarray atan2( const valarray& y, const T& vx ); (2) template< class T > valarray atan2( const T& vy, const valarray& x ); (3)
Calcule la tangente inverse de `y/x` en utilisant les signes d'arguments pour déterminer correctement le quadrant .
Original:
Computes the inverse tangent of `y/x` using the signs of arguments to correctly determine quadrant.
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1)
Calcule la tangente inverse de chaque paire de valeurs correspondantes de `y` et `x` .
Original:
Computes the inverse tangent of each pair of corresponding values from `y` and `x`.
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Le comportement est indéfini si x.size() != y.size() .
Original:
The behavior is undefined if x.size() != y.size().
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2)
Calcule la tangente inverse de `vx` et chaque valeur de la `y` tableau numérique .
Original:
Computes the inverse tangent of `vx` and each value in the numeric array `y`.
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3)
Calcule la tangente inverse de `vy` et chaque valeur de la `x` tableau numérique .
Original:
Computes the inverse tangent of `vy` and each value in the numeric array `x`.
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## Sommaire

### [modifier]Paramètres

 x, y - tableaux numériques pour calculer la tangente inverse d'Original: numeric arrays to compute inverse tangent ofThe text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. vy, vx - pour calculer les valeurs de tangente inverseOriginal: values to compute inverse tangent ofThe text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

### [modifier]Retourne la valeur

Un tableau numérique contenant les résultats du calcul de la tangente inverse .
Original:
A numeric array containing the results of computation of inverse tangent.
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### [modifier]Notes

Fonction sans réserve (atan2) est utilisé pour effectuer le calcul. Si cette fonction n'est pas disponible, std::atan2 est utilisé en raison de l'argument de recherche sous la g .
Original:
Unqualified function (atan2) is used to perform the computation. If such function is not available, std::atan2 is used due to argument dependent lookup.
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La fonction peut être mise en œuvre avec le type de retour différent de std::valarray. Dans ce cas, le type de remplacement a les propriétés suivantes:
Original:
The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:
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• Toutes les fonctions de membre de const std::valarray sont fournis .
Original:
All const member functions of std::valarray are provided.
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• std::valarray, std::slice_array, std::gslice_array, std::mask_array et std::indirect_array peut être construit à partir du type de remplacement .
Original:
std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the replacement type.
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• Toutes les fonctions acceptant un argument de type de const std::valarray& devrait également accepter le type de remplacement .
Original:
All functions accepting a arguments of type const std::valarray& should also accept the replacement type.
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• Toutes les fonctions qui acceptent deux arguments de type de const std::valarray& devrait accepter toutes les combinaisons de const std::valarray& et le type de remplacement .
Original:
All functions accepting two arguments of type const std::valarray& should accept every combination of const std::valarray& and the replacement type.
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### [modifier]Voir aussi

 atan2 arc tangente, en utilisant des signes pour déterminer quadrants Original:arc tangent, using signs to determine quadrants The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction)