Mathematical function definitions. More...

#include <cmath>

Functions
double	gammalib::acos (const double &arg)
	Computes acos by avoiding NaN due to rounding errors.

double	gammalib::atan2 (const double &y, const double &x)
	Compute arc tangens in radians.

double	gammalib::cosd (const double &angle)
	Compute cosine of angle in degrees.

double	gammalib::sind (const double &angle)
	Compute sine of angle in degrees.

double	gammalib::tand (const double &angle)
	Compute tangens of angle in degrees.

double	gammalib::asind (const double &value)
	Compute arc sine in degrees.

double	gammalib::acosd (const double &value)
	Compute arc cosine in degrees.

double	gammalib::atand (const double &value)
	Compute arc tangens in degrees.

double	gammalib::atan2d (const double &y, const double &x)
	Compute arc tangens in degrees.

void	gammalib::sincosd (const double &angle, double s, double c)
	Compute sine and cosine of angle in degrees.

double	gammalib::gammln (const double &arg)
	Computes logarithm of gamma function.

double	gammalib::erf (const double &arg)
	Computes error function.

double	gammalib::erfc (const double &arg)
	Computes complementary error function.

double	gammalib::erfinv (const double &arg)
	Computes inverse error function.

double	gammalib::modulo (const double &v1, const double &v2)
	Returns the remainder of the division.

double	gammalib::plaw_integral (const double &x1, const double &f1, const double &x2, const double &f2)
	Returns the integral of a power law.

double	gammalib::gauss_integral (const double &x1, const double &x2)
	Returns the integral of a Gaussian function.

Variables
const double	gammalib::pi = 3.141592653589793238462643383279502884197

const double	gammalib::twopi = 6.283185307179586476925286766559005768394

const double	gammalib::fourpi = 12.56637061435917295385057353311801153679

const double	gammalib::pihalf = 1.570796326794896619231321691639751442099

const double	gammalib::inv_pihalf = 0.6366197723675813430755350534900574

const double	gammalib::inv_sqrt4pi = 0.2820947917738781434740397257803862929220

const double	gammalib::inv_sqrt2pi = 0.3989422804014327028632180827116826549172

const double	gammalib::pi2 = pi*pi

const double	gammalib::deg2rad = 0.0174532925199432954743717

const double	gammalib::rad2deg = 57.295779513082322864647722

const double	gammalib::ln2 = 0.6931471805599453094172321214581766

const double	gammalib::ln10 = 2.3025850929940456840179914546843642

const double	gammalib::inv_ln2 = 1.4426950408889634073599246810018921

const double	gammalib::inv_ln10 = 1.0/ln10

const double	gammalib::inv_loge = 1.0/std::log10(std::exp(1.0))

const double	gammalib::onethird = 1.0/3.0

const double	gammalib::twothird = 2.0/3.0

const double	gammalib::fourthird = 4.0/3.0

const double	gammalib::sqrt_onehalf = std::sqrt(1.0/2.0)

const double	gammalib::sqrt_two = std::sqrt(2.0)

const double	gammalib::sqrt_pihalf = std::sqrt(pihalf)

const double	gammalib::sqrt_twopi = std::sqrt(twopi)

const double	gammalib::sigma2fwhm = 2.0 * std::sqrt(2.0 * ln2)

Detailed Description

Mathematical function definitions.

Definition in file GMath.hpp.

Namespaces