SpecialFunction

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Class SpecialFunction

java.lang.Object
  graph.SpecialFunction

public final class SpecialFunction
extends java.lang.Object

This class contains physical constants and special functions not found in the java.lang.Math class. Like the java.lang.Math class this class is final and cannot be subclassed. All physical constants are in cgs units.

NOTE: These special functions do not necessarily use the fastest or most accurate algorithms.

Version:: $Revision: 2.4 $, $Date: 2001/05/29 09:36:38 $

Field Summary

static double AU
          Astronomical Unit (radius of the Earth's orbit).

static double AVOGADRO
          Avogadro Number.

static double BOLTZMAN
          Boltzman Constant.

static double ECHARGE
          Elementary Charge.

static double EMASS
          Electron Mass.

static double GASCONSTANT
          Gas Constant.

static double GRAV
          Gravitational Constant.

static double GRAVACC
          Gravitational Acceleration at the Earths surface.

static double LIGHTSPEED
          Speed of Light in a Vacuum.

private static double LOGPI


private static double MACHEP


private static double MAXGAM


private static double MAXLOG


private static double MINLOG


static double PLANCK
          Planck constant.

static double PMASS
          Proton Mass.

static double SOLARFLUX
          Solar Flux.

static double SOLARLUM
          Solar Luminosity.

static double SOLARMASS
          Solar Mass.

static double SOLARRADIUS
          Solar Radius.

private static double SQRTH


private static double SQTPI


static double STEFANBOLTZ
          Stefan-Boltzman Constant.

Constructor Summary

private SpecialFunction()
          Don't let anyone instantiate this class.

Method Summary

static double acosh(double x)


static double asinh(double xx)


static double atanh(double x)


static double chisq(double df, double x)
          Returns the area under the left hand tail (from 0 to x) of the Chi square probability density function with v degrees of freedom.

static double chisqc(double df, double x)
          Returns the area under the right hand tail (from x to infinity) of the Chi square probability density function with v degrees of freedom:

static double cosh(double x)


static double erf(double x)


static double erfc(double a)


static double fac(double x)


static int fac(int j)


static double gamma(double x)


static double ibeta(double aa, double bb, double xx)


static double igam(double a, double x)


static double igamc(double a, double x)


private static double incbcf(double a, double b, double x)


private static double incbd(double a, double b, double x)


static double j0(double x)


static double j1(double x)


static double jn(int n, double x)


private static double lgamma(double x)


static double log10(double x)


static double normal(double a)


private static double p1evl(double x, double[] coef, int N)


static double poisson(int k, double x)
          Returns the sum of the first k terms of the Poisson distribution.

static double poissonc(int k, double x)
          Returns the sum of the terms k+1 to infinity of the Poisson distribution.

private static double polevl(double x, double[] coef, int N)


private static double pseries(double a, double b, double x)


static double sinh(double x)


private static double stirf(double x)


static double tanh(double x)


static double y0(double x)


static double y1(double x)


static double yn(int n, double x)


Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MACHEP

private static final double MACHEP

See Also:: Constant Field Values

MAXLOG

private static final double MAXLOG

See Also:: Constant Field Values

MINLOG

private static final double MINLOG

See Also:: Constant Field Values

MAXGAM

private static final double MAXGAM

See Also:: Constant Field Values

SQTPI

private static final double SQTPI

See Also:: Constant Field Values

SQRTH

private static final double SQRTH

See Also:: Constant Field Values

LOGPI

private static final double LOGPI

See Also:: Constant Field Values

BOLTZMAN

public static final double BOLTZMAN

Boltzman Constant. Units erg/deg(K)

See Also:: Constant Field Values

ECHARGE

public static final double ECHARGE

Elementary Charge. Units statcoulomb

See Also:: Constant Field Values

EMASS

public static final double EMASS

Electron Mass. Units g

See Also:: Constant Field Values

PMASS

public static final double PMASS

Proton Mass. Units g

See Also:: Constant Field Values

GRAV

public static final double GRAV

Gravitational Constant. Units dyne-cm^2/g^2

See Also:: Constant Field Values

PLANCK

public static final double PLANCK

Planck constant. Units erg-sec

See Also:: Constant Field Values

LIGHTSPEED

public static final double LIGHTSPEED

Speed of Light in a Vacuum. Units cm/sec

See Also:: Constant Field Values

STEFANBOLTZ

public static final double STEFANBOLTZ

Stefan-Boltzman Constant. Units erg/cm^2-sec-deg^4

See Also:: Constant Field Values

AVOGADRO

public static final double AVOGADRO

Avogadro Number. Units 1/mol

See Also:: Constant Field Values

GASCONSTANT

public static final double GASCONSTANT

Gas Constant. Units erg/deg-mol

See Also:: Constant Field Values

GRAVACC

public static final double GRAVACC

Gravitational Acceleration at the Earths surface. Units cm/sec^2

See Also:: Constant Field Values

SOLARMASS

public static final double SOLARMASS

Solar Mass. Units g

See Also:: Constant Field Values

SOLARRADIUS

public static final double SOLARRADIUS

Solar Radius. Units cm

See Also:: Constant Field Values

SOLARLUM

public static final double SOLARLUM

Solar Luminosity. Units erg/sec

See Also:: Constant Field Values

SOLARFLUX

public static final double SOLARFLUX

Solar Flux. Units erg/cm^2-sec

See Also:: Constant Field Values

AU

public static final double AU

Astronomical Unit (radius of the Earth's orbit). Units cm

See Also:: Constant Field Values

Constructor Detail