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std::lgamma

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C++
 
Biblioteca numéricos
Funções matemáticas comuns
De ponto flutuante ambiente
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Matrizes numéricas
Pseudo-aleatório de geração de números
Tempo de compilação aritmética racional (C++11)
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Generic numeric operations
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iota(C++11)
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Funções matemáticas comuns
Funções
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Operações básicas
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remainder(C++11)
remquo(C++11)
fma(C++11)
fmax(C++11)
fmin(C++11)
fdim(C++11)
nan
nanf
nanl		(C++11)
(C++11)
(C++11)
Funções exponenciais
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Exponential functions
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exp
exp2(C++11)
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Funções de poder
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Power functions
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sinh
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Erro e funções gamma
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Error and gamma functions
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erf(C++11)
erfc(C++11)
lgamma(C++11)
tgamma(C++11)
Número inteiro mais próximo de operações de ponto flutuante
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Nearest integer floating point operations
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ceil
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(C++11)
(C++11)
trunc(C++11)
nearbyint(C++11)
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llrint		(C++11)
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ldexp
scalbn
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(C++11)
ilogb(C++11)
logb(C++11)
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modf
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isnan(C++11)
isnormal(C++11)
signbit(C++11)
isgreater(C++11)
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isless(C++11)
islessequal(C++11)
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FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN		(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
 
Defined in header <cmath>
float       lgamma( float arg );
 (a partir do C++ 11)
double      lgamma( double arg );
 (a partir do C++ 11)
long double lgamma( long double arg );
 (a partir do C++ 11)
double      lgamma( Integral arg );
 (a partir do C++ 11)
Calcula o logaritmo natural do valor absoluto do gama de funções de arg.
Original:
Computes the natural logarithm of the absolute value of the gama de funções of arg.
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Índice

[editar] Parâmetros

arg -
flutuando valor de ponto
Original:
floating point value
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[editar] Valor de retorno

O valor do logaritmo da função gama de arg, isto é log
e|∫∞
0targ-1
 e-t dt|.
Original:
The value of the logarithm of the gamma function of arg, that is log
e|∫∞
0targ-1
 e-t dt|.
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Se arg é um número natural, std::lgamma(arg) é o logaritmo do fatorial 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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[editar] Exceções

Se arg é zero ou um inteiro negativo, pode ocorrer erro pólo e FE_INVALID FE_DIVBYZERO ou podem ser levantadas.
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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Se arg for demasiado grande, intervalo de erro pode ocorrer e pode ser elevado FE_OVERFLOW.
Original:
If arg is too large, range error may occur and FE_OVERFLOW may be raised.
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[editar] Notas

POSIX specification requer adicionalmente que cada execução de lgamma armazena o sinal da função gama de arg no signgam variável externa.
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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[editar] Veja também

(C++11)
gama de funções
Original:
gamma function
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(função) [edit]
C documentation for lgamma

[editar] Links externos

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