org.jlab.groot.math

Class FunctionFactory

java.lang.Object

org.jlab.groot.math.FunctionFactory

public class FunctionFactory
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static java.util.Map<java.lang.String,Func1D>	funcionDesk
static double	PI_OVER_2

Constructor Summary

Constructors

Constructor and Description
FunctionFactory()

Method Summary

Modifier and Type	Method and Description
static double	acos(double x) Fast acos using 8 term polynomial approximation from Abramowitz and Stegun, pg.
static double	asin_4(double x) Fast asin using 4 term polynomial approximation from Abramowitz and Stegun, pg.
static double	asin(double x) Fast asin using 8 term polynomial approximation from Abramowitz and Stegun, pg.
static double	atan(double x)
static double	atan2(double y, double x)
static H1F	createDebugH1F(int bins)
static Func1D	createFunction(int type)
static H1F	createH1F(int type, int bins, int samples)
static double	gauss(double x, double mean, double sigma)
static double	getRandMinMax(double min, double max)
static double	landau(double x, double mean, double sigma)
static void	main(java.lang.String[] args)
static H1F	randomGausian(int bins, double min, double max, int stat, double mean, double sigma) generates a histogram with gaussian function
static H2F	randomGausian2D(int bins, double min, double max, int stat, double mean, double sigma)
static void	registerFunction(Func1D func)

Methods inherited from class java.lang.Object

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

Field Detail

funcionDesk

public static java.util.Map<java.lang.String,Func1D> funcionDesk

PI_OVER_2

public static double PI_OVER_2

Constructor Detail

FunctionFactory

public FunctionFactory()

Method Detail

acos

public static double acos(double x)

Fast acos using 8 term polynomial approximation from Abramowitz and Stegun, pg. 81.

Note: Accuracy to within 3 x 10^-8 radians.

Parameters:

x -

Returns:

arccos(x)

asin

public static double asin(double x)

Fast asin using 8 term polynomial approximation from Abramowitz and Stegun, pg. 81.

Note: Accuracy to within 3 x 10^-8 radians.

Parameters:

x -

Returns:

arcsin(x)

asin_4

public static double asin_4(double x)

Fast asin using 4 term polynomial approximation from Abramowitz and Stegun, pg. 81.

Note: Accuracy to within 7 x 10^-5 radians.

Parameters:

x -

Returns:

arcsin(x)

registerFunction

public static void registerFunction(Func1D func)

atan

public static double atan(double x)

atan2

public static double atan2(double y,
                           double x)

gauss

public static double gauss(double x,
                           double mean,
                           double sigma)

getRandMinMax

public static double getRandMinMax(double min,
                                   double max)

landau

public static double landau(double x,
                            double mean,
                            double sigma)

randomGausian

public static H1F randomGausian(int bins,
                                double min,
                                double max,
                                int stat,
                                double mean,
                                double sigma)

generates a histogram with gaussian function

Parameters:

bins -

min -

max -

stat -

mean -

sigma -

Returns:

randomGausian2D

public static H2F randomGausian2D(int bins,
                                  double min,
                                  double max,
                                  int stat,
                                  double mean,
                                  double sigma)

createDebugH1F

public static H1F createDebugH1F(int bins)

createH1F

public static H1F createH1F(int type,
                            int bins,
                            int samples)

createFunction

public static Func1D createFunction(int type)

main

public static void main(java.lang.String[] args)