LowPassFilter (leJOS EV3 API documentation)

java.lang.Object
- lejos.robotics.filter.AbstractFilter
- - lejos.robotics.filter.LowPassFilter

All Implemented Interfaces:

SampleProvider
```
public class LowPassFilter
extends AbstractFilter
```
Provides a low-pass filter for samples

Author:

Aswin

See Also:

http://en.wikipedia. org/wiki/Low-pass_filter

Field Summary
- Fields inherited from class lejos.robotics.filter.AbstractFilter
  sampleSize, source

Constructor Summary

Constructors
Constructor Description

LowPassFilter(SampleProvider source, float timeConstant)
Constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`fetchSample(float[] dst, int off)`	Fetches a sample from the source and low-passes it See http://en.wikipedia.org/wiki/Low-pass_filter
`void`	`setTimeConstant(float timeConstant)`

Methods inherited from class lejos.robotics.filter.AbstractFilter
sampleSize

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

- Constructor Detail
  - LowPassFilter
```
public LowPassFilter(SampleProvider source,
                     float timeConstant)
```
    Constructor
    
    Parameters:
    
    source - The source for getting samples
    
    timeConstant - The cut-off frequency for the filter
- Method Detail
  - fetchSample
```
public void fetchSample(float[] dst,
                        int off)
```
    Fetches a sample from the source and low-passes it See http://en.wikipedia.org/wiki/Low-pass_filter
    
    Specified by:
    
    fetchSample in interface SampleProvider
    
    Overrides:
    
    fetchSample in class AbstractFilter
    
    Parameters:
    
    dst - The array to store the sample in.
    
    off - The elements of the sample are stored in the array starting at the offset position.
  - setTimeConstant
```
public void setTimeConstant(float timeConstant)
```