Numerical Routines
[Common]

Defines
#define	ADDRESS(i)   ((void *)CHADDR(i))
#define	CHADDR(i)   ((void *)(&(((char *)base)[(i)*size])))
#define	SWAP(i, j)   {memcpy(tmpbuf,CHADDR(i),size); memcpy(CHADDR(i),CHADDR(j),size); memcpy(CHADDR(j),tmpbuf,size);}
Functions
double	gan_sqr_d (double x)
	Real square function.
float	gan_sqr_f (float x)
	Real square function (single precision).
int	gan_sqr_i (int x)
	Integer square function.
unsigned	gan_sqr_ui (unsigned x)
	Unsigned integer square function.
long	gan_sqr_l (long x)
	Long integer square function.
double	gan_cbrt (double x)
	Real cube root function.
double	gan_normal_sample (double mu, double sigma)
	Returns a sample of a normally distributed random variable.
int	gan_solve_quadratic (double a, double b, double c, Gan_Complex x[2])
	Find roots of a quadratic equation with real coefficients.
int	gan_solve_cubic (double a, double b, double c, double d, Gan_Complex x[3])
	Find roots of a cubic equation with real coefficients.
void *	gan_kth_highest (void *base, size_t nmemb, size_t size, unsigned int k, int(*compar)(const void *, const void *))
	Return k'th highest element of an array.
double	gan_sqr (double x)
	Macro: Computes square of a number.
long	gan_random (void)
	Macro: Integer random number generator function.
void	gan_random_set_seed (unsigned seed)
	Macro: Integer random number seed setter function.
double	gan_random_01 (void)
	Macro: Random floating point number between 0 and 1.
double	gan_random_m11 (void)
	Macro: Random floating point number between -1 and 1.

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Function Documentation

double gan_cbrt (  double  x  )

Real cube root function. Parameters: x  Input real value Returns: The cube root of x. Real cube root function.

double gan_normal_sample (  double  mu, double  sigma )

Returns a sample of a normally distributed random variable. Parameters: mu  The mean of the normal distribution sigma  The standard deviation of the Gaussian distribution Returns: The sample taken from the normal distribution. Returns a sample from a normal distribution. Two values are computed, but only one is returned.

int gan_solve_cubic (  double  a, double  b, double  c, double  d, Gan_Complex  x[3] )

Find roots of a cubic equation with real coefficients. Parameters: a  The coeffient in b  The coeffient in c  The coeffient in d  The scalar coeffient x  The roots of the equation Returns: The number of roots, or -1 on error. Solve cubic equation using method given in Numerical Recipes.

int gan_solve_quadratic (  double  a, double  b, double  c, Gan_Complex  x[2] )

Find roots of a quadratic equation with real coefficients. Parameters: a  The coeffient in b  The coeffient in c  The scalar coeffient x  The roots of the equation Returns: The number of roots, or -1 on error. Solve quadratic equation using method given in Numerical Recipes.

double gan_sqr_d (  double  x  )

Real square function. Parameters: x  Input real value Returns: The square of x Real square function. See also: gan_sqr_i(), gan_cbrt().

float gan_sqr_f (  float  x  )

Real square function (single precision). Parameters: x  Input real value Returns: The square of x Real square function See also: gan_sqr_d(), gan_cbrt().

int gan_sqr_i (  int  x  )

Integer square function. Parameters: x  Input integer value Returns: The square of x Integer square function See also: gan_sqr_d(), gan_cbrt().

long gan_sqr_l (  long  x  )

Long integer square function. Parameters: x  Input long integer value Returns: The square of x Long integer square function See also: gan_sqr_i(), gan_cbrt().

unsigned gan_sqr_ui (  unsigned  x  )

Unsigned integer square function. Parameters: x  Input unsigned integer value Returns: The square of x Unsigned integer square function. See also: gan_sqr_d(), gan_cbrt().

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