log1p
(PHP 4 >= 4.1.0, PHP 5)
log1p --
Returns log(1 + number), computed in a way that is accurate even when
the value of number is close to zero
Description
float
log1p ( float number )
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log1p() returns log(1 +
number) computed in a way that is accurante even
when the value of number is close to zero.
See also expm1() and
log().