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std::log1p

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Defined in header <cmath>
float       log1p( float arg );
(seit C++11)
double      log1p( double arg );
(seit C++11)
long double log1p( long double arg );
(seit C++11)
double      log1p( Integral arg );
(seit C++11)
Berechnet den natürlichen (Basis e) Logarithmus 1+arg. Diese Funktion ist genauer als der Ausdruck std::log(1+arg) wenn arg nahe Null ist .
Original:
Computes the natural (base e) logarithm of 1+arg. This function is more precise than the expression std::log(1+arg) if arg is close to zero.
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[Bearbeiten] Parameter

arg -
Floating-Point-Wert
Original:
floating point value
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[Bearbeiten] Rückgabewert

ln(1+arg)

Domain-Fehler tritt auf, wenn arg negativ ist. NAN wird in diesem Fall wieder .
Original:
Domain error occurs if arg is negative. NAN is returned in that case.
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Bereichs-Fehler tritt auf, wenn arg ist 0. -HUGE_VAL wird in diesem Fall wieder .
Original:
Range error occurs if arg is 0. -HUGE_VAL is returned in that case.
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[Bearbeiten] Siehe auch

berechnet natürlichen (base e) Logarithmus (zur Basis e) (ln(x))
Original:
computes natural (base e) logarithm (to base e) (ln(x))
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(Funktion) [edit]
(C++11)
Renditen e an die angegebene Potenz, minus eins (ex-1)
Original:
returns e raised to the given power, minus one (ex-1)
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(Funktion) [edit]
berechnet gemeinsamen (base 10) Logarithmus (log10(x))
Original:
computes common (base 10) logarithm (log10(x))
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(Funktion) [edit]
(C++11)
Logarithmus zur Basis 2 der bestimmten Anzahl
Original:
base 2 logarithm of the given number
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(Funktion) [edit]