Constant (SuanShuExtension API)

java.lang.Object
- com.numericalmethod.suanshu.Constant

```
public class Constant
extends java.lang.Object
```
This class lists the global parameters and constants in this SuanShu library.

Field Summary

Fields
Modifier and Type	Field and Description
`static double`	`EPSILON` the default epsilon used in this library
`static double`	`EULER_MASCHERONI` the Euler–Mascheroni constant
`static double`	`GOLDEN_RATIO` the Golden ratio
`static double`	`MACH_EPS` the machine epsilon This is the difference between 1 and the smallest exactly representable number greater than 1.
`static int`	`MACH_SCALE` the scale for the machine epsilon
`static double`	`PI_SQ` \(\pi^2\)
`static double`	`ROOT_2` \(\sqrt{2}\)
`static double`	`ROOT_2_PI` \(\sqrt{2\pi}\)
`static double`	`ROOT_PI` \(\sqrt{\pi}\)

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static double`	`unitRoundOff()` Get the default unit round off.
`static double`	`unitRoundOff(int base, int precision)` Get the unit round off as defined in the reference.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - MACH_EPS
```
public static final double MACH_EPS
```
    the machine epsilon
    This is the difference between 1 and the smallest exactly representable number greater than 1.
    
    See Also:
    
    Wikipedia: Machine epsilon
  - MACH_SCALE
```
public static final int MACH_SCALE
```
    the scale for the machine epsilon
  - EPSILON
```
public static final double EPSILON
```
    the default epsilon used in this library
  - ROOT_2
```
public static final double ROOT_2
```
    \(\sqrt{2}\)
  - ROOT_2_PI
```
public static final double ROOT_2_PI
```
    \(\sqrt{2\pi}\)
  - ROOT_PI
```
public static final double ROOT_PI
```
    \(\sqrt{\pi}\)
  - PI_SQ
```
public static final double PI_SQ
```
    \(\pi^2\)
    
    See Also:
    
    Constant Field Values
  - EULER_MASCHERONI
```
public static final double EULER_MASCHERONI
```
    the Euler–Mascheroni constant
    
    See Also:
    
    Wikipedia: Euler–Mascheroni constant, Constant Field Values
  - GOLDEN_RATIO
```
public static final double GOLDEN_RATIO
```
    the Golden ratio
    
    See Also:
    
    Wikipedia: Golden ratio
- Method Detail
  - unitRoundOff
```
public static double unitRoundOff(int base,
                                  int precision)
```
    Get the unit round off as defined in the reference.
    
    Parameters:
    
    base - base, e.g., 10
    
    precision - precision (number of digits)
    
    Returns:
    
    the unit round off
    
    See Also:
    
    "G. H. Golub, C. F. van Loan, "Eq. 2.4.4, Section 2.4.1," Matrix Computations, 3rd edition."
  - unitRoundOff
```
public static double unitRoundOff()
```
    Get the default unit round off.
    
    Returns:
    
    the default unit round off

Class Constant

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MACH_EPS

MACH_SCALE

EPSILON

ROOT_2

ROOT_2_PI

ROOT_PI

PI_SQ

EULER_MASCHERONI

GOLDEN_RATIO

Method Detail

unitRoundOff

unitRoundOff