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std::lgamma

De cppreference.com
< cpp‎ | numeric‎ | math

 
 
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</div>
 
</div>
Defined in header <cmath>
float       lgamma( float arg );
(depuis C++11)
double      lgamma( double arg );
(depuis C++11)
long double lgamma( long double arg );
(depuis C++11)
double      lgamma( Integral arg );
(depuis C++11)
Calcule le logarithme naturel de la valeur absolue de la fonction gamma de arg .
Original:
Computes the natural logarithm of the absolute value of the fonction gamma of arg.
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Sommaire

[modifier] Paramètres

arg -
valeur du point flottant
Original:
floating point value
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[modifier] Retourne la valeur

La valeur du logarithme de la fonction de gamma d'arg, qui est log
e
|
0
targ-1
e-t dt|
.
Original:
The value of the logarithm of the gamma function of arg, that is log
e
|
0
targ-1
e-t dt|
.
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Si arg est un nombre naturel, std::lgamma(arg) est le logarithme de la factorielle de arg-1 .
Original:
If arg is a natural number, std::lgamma(arg) is the logarithm of the factorial of arg-1.
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[modifier] Exceptions

Si arg est zéro ou un entier négatif, une erreur peut se produire pôle et FE_INVALID ou FE_DIVBYZERO peut être soulevée .
Original:
If arg is zero or a negative integer, pole error may occur and FE_INVALID or FE_DIVBYZERO may be raised.
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Si arg est trop grande, l'erreur peut se produire plage et FE_OVERFLOW peut être soulevée .
Original:
If arg is too large, range error may occur and FE_OVERFLOW may be raised.
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[modifier] Notes

POSIX specification nécessite en outre que chaque exécution de lgamma stocke le signe de la fonction gamma d'arg dans la variable externe signgam .
Original:
POSIX specification additionally requires that each execution of lgamma stores the sign of the gamma function of arg in the external variable signgam.
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[modifier] Voir aussi

(C++11)
fonction gamma
Original:
gamma function
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(fonction) [edit]
C documentation for lgamma

[modifier] Liens externes

Weisstein, Eric W. "Log Gamma Function." De MathWorld - Une ressource Web Wolfram .
Original:
Weisstein, Eric W. "Log Gamma Function." From MathWorld--A Wolfram Web Resource.
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