User login |
clog (3)
CLOG(3) Linux Programmer's Manual CLOG(3)
NAME
clog, clogf, clogl - natural logarithm of a complex number
SYNOPSIS
#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.
DESCRIPTION
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.
CONFORMING TO
C99
SEE ALSO
cabs(3), cexp(3), clog10(3), complex(7)
2002-07-28 CLOG(3)
|