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 )

警告

�o�Ө�ƬO����ʽ��C�o�Ө�ƪ�欰�B�W�١B�M����ƪ����L���b��PHP�o�椤�i��|�b�q�p�U���ܡC �ϥΦ��ݦۦ�Ӿ᭷�I�C

log1p() returns log(1 + number) computed in a way that is accurante even when the value of number is close to zero.

注: ��Ƥ�A�Ω� Windows �x�C

See also expm1() and log().