Namespace
Varianti

lgamma

Da cppreference.com.
< c‎ | numeric‎ | math

 
 
 
Comuni funzioni matematiche
Funzioni
Original:
Functions
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Operazioni di base
Original:
Basic operations
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remainder(C99)
remquo(C99)
fma(C99)
fmax(C99)
fmin(C99)
fdim(C99)
nan
nanf
nanl
(C99)
(C99)
(C99)
Funzioni esponenziali
Original:
Exponential functions
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exp
exp2(C99)
expm1(C99)
log
log10
log1p(C99)
log2(C99)
Funzioni di risparmio energia
Original:
Power functions
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sqrt
cbrt(C99)
hypot(C99)
pow
Funzioni trigonometriche e iperboliche
Original:
Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C99)
acosh(C99)
atanh(C99)
Errore e gamma funzioni
Original:
Error and gamma functions
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erf(C99)
erfc(C99)
lgamma(C99)
tgamma(C99)
Più vicini operazioni di interi in virgola mobile
Original:
Nearest integer floating point operations
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ceil
floor
round
lround
llround
(C99)
(C99)
(C99)
trunc(C99)
nearbyint(C99)
rint
lrint
llrint
(C99)
(C99)
(C99)
Floating funzioni di manipolazione di punti
Original:
Floating point manipulation functions
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ldexp
scalbn
scalbln
(C99)
(C99)
ilogb(C99)
logb(C99)
Classificazione
Original:
Classification
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fpclassify(C99)
isfinite(C99)
isinf(C99)
isnan(C99)
isnormal(C99)
signbit(C99)
Macro costanti
Original:
Macro constants
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Defined in header <math.h>
float       lgammaf( float arg );
double      lgamma( double arg );
long double lgammal( long double arg );
Calcola il logaritmo naturale del valore assoluto della funzione gamma di arg.
Original:
Computes the natural logarithm of the absolute value of the funzione gamma of arg.
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Indice

[modifica] Parametri

arg -
valore in virgola mobile
Original:
floating point value
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[modifica] Valore di ritorno

Il valore del logaritmo della funzione gamma di arg, che è 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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Se arg è un numero naturale, lgamma(arg) è il logaritmo del fattoriale di arg-1.
Original:
If arg is a natural number, lgamma(arg) is the logarithm of the factorial of arg-1.
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[modifica] Eccezioni

Se arg è zero o un numero intero negativo, errore può verificarsi polo e FE_INVALID o FE_DIVBYZERO può essere sollevata.
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 è troppo grande, l'errore può verificarsi gamma e FE_OVERFLOW può essere sollevata.
Original:
If arg is too large, range error may occur and FE_OVERFLOW may be raised.
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[modifica] Note

POSIX specification richiede inoltre che ogni esecuzione del lgamma memorizza il segno della funzione gamma di arg nel signgam variabile esterna.
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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[modifica] Vedi anche

(C99)
funzione gamma
Original:
gamma function
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(funzione) [edit]

[modifica] Collegamenti esterni

Weisstein, Eric W. "Log Gamma Function." Da MathWorld - Una risorsa Web Wolfram.
Original:
Weisstein, Eric W. "Log Gamma Function." From MathWorld--A Wolfram Web Resource.
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