NAME
carg, cargf, cargl - calculate the complex argument SYNOPSIS
#include
double carg(double complex z); float cargf(float complex z); long double cargl(long double complex z); Link with -lm. DESCRIPTION A complex number can be described by two real coordinates. One may use rectangular coordinates and gets z = x + I * y where x = creal(z) and y = cimag(z). Or one may use polar coordinates and gets z = r * cexp(I * a) where r = cabs(z) is the "radius", the "modulus", the absolute value of z, and a = carg(z) is the "phase angle", the argument of z. One has: tan(carg(z)) = cimag(z) / creal(z) RETURN VALUE
The return value is the range of [-pi,pi]. VERSIONS These functions first appeared in glibc in version 2.1. ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌─────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├─────────────────────────┼───────────────┼─────────┤
│carg(), cargf(), cargl() │ Thread safety │ MT-Safe │ └─────────────────────────┴───────────────┴─────────┘ CONFORMING TO C99. SEE ALSO cabs(3), complex(7) COLOPHON
This page is part of release 3.53 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 CARG(3)