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    std::lgamma

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    <metanoindex/>

     
    C++
     
    Numerik-Bibliothek
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    tgamma(C++11)
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    (C++11)
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    <tbody> </tbody>
    definiert in Header <cmath>
    float lgamma( float arg );
    		 (seit C++11)
    double lgamma( double arg );
    		 (seit C++11)
    long double lgamma( long double arg );
    		 (seit C++11)
    double lgamma( Integral arg );
    		 (seit C++11)
    Berechnet den natürlichen Logarithmus des absoluten Wertes des Gamma-Funktion von arg .
    Original:
    Computes the natural logarithm of the absolute value of the Gamma-Funktion of arg.
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    Parameter

    arg -
    Floating-Point-Wert
    Original:
    floating point value
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    Rückgabewert

    Der Wert des Logarithmus der Gammafunktion arg, das heißt 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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    Wenn arg eine natürliche Zahl ist, ist std::lgamma(arg) der Logarithmus der Fakultät 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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    Ausnahmen

    Wenn arg Null oder eine negative ganze Zahl ist, kann pole Fehler auftreten und FE_INVALID oder FE_DIVBYZERO angehoben werden kann .
    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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    Wenn arg zu groß ist, können die Reichweite Fehler auftreten und FE_OVERFLOW angehoben werden kann .
    Original:
    If arg is too large, range error may occur and FE_OVERFLOW may be raised.
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    Notes

    POSIX specification zusätzlich erfordert, dass jede Ausführung des lgamma das Vorzeichen der Gammafunktion arg in der externen Variable speichert 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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    Siehe auch

    (C++11)
    Gamma-Funktion
    Original:
    gamma function
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    (Funktion) [edit]
    C documentation for lgamma

    Externer Links

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