SinCosTable.HalfTable (ELKI: Environment for DeveLoping KDD-Applications Supported by Index-Structures)

java.lang.Object
- elki.math.SinCosTable
- - elki.math.SinCosTable.HalfTable

Enclosing class:

SinCosTable
```
private static class SinCosTable.HalfTable
extends SinCosTable
```
Table that exploits just one symmetry, as the number of steps is divisible by two.

Author:

Erich Schubert

- Field Summary
  
  Fields
  Modifier and Type Field Description
  
  private double[] costable
  Data store
  
  private int halfsteps
  Number of steps div 2
  
  private double[] sintable
  Data store
  - Fields inherited from class elki.math.SinCosTable
    steps
- Constructor Summary
  
  Constructors
  Constructor Description
  
  HalfTable(int steps)
  Constructor for tables with
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  double cos(int step)
  Get Cosine by step value.
  
  double sin(int step)
  Get Sinus by step value.
  - Methods inherited from class elki.math.SinCosTable
    make
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - halfsteps
```
private final int halfsteps
```
    Number of steps div 2
  - costable
```
private final double[] costable
```
    Data store
  - sintable
```
private final double[] sintable
```
    Data store
- Constructor Detail
  - HalfTable
```
public HalfTable(int steps)
```
    Constructor for tables with
    
    Parameters:
    
    steps -
- Method Detail
  - cos
```
public double cos(int step)
```
    Get Cosine by step value.
    
    Specified by:
    
    cos in class SinCosTable
    
    Parameters:
    
    step - Step value
    
    Returns:
    
    Cosinus
  - sin
```
public double sin(int step)
```
    Get Sinus by step value.
    
    Specified by:
    
    sin in class SinCosTable
    
    Parameters:
    
    step - Step value
    
    Returns:
    
    Sinus