NAME | SYNOPSIS | DESCRIPTION | VERSIONS | CONFORMING TO | SEE ALSO | COLOPHON
CLOG(3) Linux Programmer's Manual CLOG(3)
clog, clogf, clogl - natural logarithm of a complex number
#include <complex.h>
double complex clog(double complex z);
float complex clogf(float complex z);
long double complex clogl(long double complex z);
Link with -lm.
The logarithm clog() is the inverse function of the exponential cexp(3).
Thus, if y = clog(z), then z = cexp(y). The imaginary part of y is chosen in
the interval [-pi,pi].
One has:
clog(z) = log(cabs(z)) + I * carg(z)
Note that z close to zero will cause an overflow.
These functions first appeared in glibc in version 2.1.
C99.
cabs(3), cexp(3), clog10(3), complex(7)
This page is part of release 3.23 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be found
at http://www.kernel.org/doc/man-pages/.
2008-08-11 CLOG(3)