PolynomialApprox (glimpse-full-assembly 4.0.0 API)

java.lang.Object
- com.metsci.glimpse.util.math.fast.PolynomialApprox

```
public class PolynomialApprox
extends Object
```
This class contains polynomial approximations to Trigonometric functions, which are much faster than the Java built-in routines, but not as accurate.

Author:

ellis

Constructor Summary

Constructors
Constructor Description

PolynomialApprox()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static double`	`acos(double x)`	Fast acos using 8 term polynomial approximation from Abramowitz and Stegun, pg.
`static double`	`acos_4(double x)`	Fast acos 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`	`asin_4(double x)`	Fast asin using 4 term polynomial approximation from Abramowitz and Stegun, pg.
`static double`	`atan(double x)`
`static double`	`atan2(double y, double x)`

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

- Constructor Detail
  - PolynomialApprox
```
public PolynomialApprox()
```
- Method Detail
  - acos_4
```
public static double acos_4(double x)
```
    Fast acos using 4 term polynomial approximation from Abramowitz and Stegun, pg. 81.
    Note: Accuracy to within 7 x 10^-5 radians.
    
    Parameters:
    
    x -
    
    Returns:
    
    arccos(x)
  - 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_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)
  - 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)
  - atan
```
public static double atan(double x)
```
  - atan2
```
public static double atan2(double y,
                           double x)
```