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clog10(3) [php man page]

CLOG10(3)						     Linux Programmer's Manual							 CLOG10(3)

NAME
clog10, clog10f, clog10l - base-10 logarithm of a complex number SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <complex.h> double complex clog10(double complex z); float complex clog10f(float complex z); long double complex clog10l(long double complex z); Link with -lm. DESCRIPTION
The call clog10(z) is equivalent to: clog(z)/log(10) or equally: log10(cabs(c)) + I * carg(c) / log(10) The other functions perform the same task for float and long double. Note that z close to zero will cause an overflow. 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 | +-------------------------------+---------------+---------+ |clog10(), clog10f(), clog10l() | Thread safety | MT-Safe | +-------------------------------+---------------+---------+ CONFORMING TO
These functions are GNU extensions. The identifiers are reserved for future use in C99 and C11. SEE ALSO
cabs(3), cexp(3), clog(3), clog2(3), complex(7) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2017-09-15 CLOG10(3)

Check Out this Related Man Page

CATANH(3)						     Linux Programmer's Manual							 CATANH(3)

NAME
catanh, catanhf, catanhl - complex arc tangents hyperbolic SYNOPSIS
#include <complex.h> double complex catanh(double complex z); float complex catanhf(float complex z); long double complex catanhl(long double complex z); Link with -lm. DESCRIPTION
These functions calculate the complex arc hyperbolic tangent of z. If y = catanh(z), then z = ctanh(y). The imaginary part of y is chosen in the interval [-pi/2,pi/2]. One has: catanh(z) = 0.5 * (clog(1 + z) - clog(1 - z)) 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 | +-------------------------------+---------------+---------+ |catanh(), catanhf(), catanhl() | Thread safety | MT-Safe | +-------------------------------+---------------+---------+ CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008. EXAMPLE
/* Link with "-lm" */ #include <complex.h> #include <stdlib.h> #include <unistd.h> #include <stdio.h> int main(int argc, char *argv[]) { double complex z, c, f; if (argc != 3) { fprintf(stderr, "Usage: %s <real> <imag> ", argv[0]); exit(EXIT_FAILURE); } z = atof(argv[1]) + atof(argv[2]) * I; c = catanh(z); printf("catanh() = %6.3f %6.3f*i ", creal(c), cimag(c)); f = 0.5 * (clog(1 + z) - clog(1 - z)); printf("formula = %6.3f %6.3f*i ", creal(f2), cimag(f2)); exit(EXIT_SUCCESS); } SEE ALSO
atanh(3), cabs(3), cimag(3), ctanh(3), complex(7) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2015-04-19 CATANH(3)

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