PdfContGaussianZiggurat (glimpse-full-assembly 4.0.0 API)

java.lang.Object
- com.metsci.glimpse.util.math.stochastic.pdfcont.PdfContGaussianZiggurat

All Implemented Interfaces:

Pdf, PdfCont
```
public class PdfContGaussianZiggurat
extends Object
implements PdfCont
```
This routine is based on the following article, with a couple of modifications which simplify the implementation. George Marsaglia, Wai Wan Tsang The Ziggurat Method for Generating Random Variables Journal of Statistical Software, vol. 5 (2000), no. 8 http://www.jstatsoft.org/v05/i08/ The modifications are: 1) use 128 steps instead of 256 to decrease the amount of static data necessary. 2) use an acceptance sampling from an exponential wedge exp(-R*(x-R/2)) for the tail of the base strip to simplify the implementation. The area of exponential wedge is used in calculating 'v' and the coefficients in ziggurat table, so the coefficients differ slightly from those in the Marsaglia and Tsang paper. See also Leong et al, "A Comment on the Implementation of the Ziggurat Method", Journal of Statistical Software, vol 5 (2005), no 7.

Author:

osborn

Constructor Summary

Constructors
Constructor Description

PdfContGaussianZiggurat(double mean, double stdev)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`draw(Generator g)`	Returns a random draw from this PDF using the provided StochasticEngine.Generator object.
`boolean`	`equals(Object o)`
`int`	`hashCode()`

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PdfContGaussianZiggurat
```
public PdfContGaussianZiggurat(double mean,
                               double stdev)
```
- Method Detail
  - draw
```
public double draw(Generator g)
```
    Description copied from interface: PdfCont
    
    Returns a random draw from this PDF using the provided StochasticEngine.Generator object.
    
    Specified by:
    
    draw in interface PdfCont
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object