fact.filter

Class MovingMinimum

java.lang.Object

fact.filter.MovingMinimum

All Implemented Interfaces:

stream.Processor, stream.StatefulProcessor

public class MovingMinimum
extends Object
implements stream.StatefulProcessor

Calculate moving minimum with given window size.

Similar to a moving average, this processor calculates a moving minimum. When moving the window over the time series, the processor calculates the minimum inside the window for every time and returns it.

This can be used, when answering the question: What is the highest signal with a given width. In conjuction with extraction.MaxAmplitude, the position and the height of the highest signal with a given width (i.e. the window size) can be found.

Author:

Dominik Neise <neised@phys.ethz.ch>

Field Summary

Fields

Modifier and Type	Field and Description
String	key
int	length
String	outputKey

Constructor Summary

Constructors

Constructor and Description
MovingMinimum()

Method Summary

Modifier and Type	Method and Description
void	finish()
void	init(stream.ProcessContext context)
stream.Data	process(stream.Data item)
void	resetState()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

key

@Parameter(required=true)
public String key

outputKey

@Parameter(required=true)
public String outputKey

length

@Parameter(required=true)
public int length

Constructor Detail

MovingMinimum

public MovingMinimum()

Method Detail

process

public stream.Data process(stream.Data item)

Specified by:

process in interface stream.Processor

init

public void init(stream.ProcessContext context)
          throws Exception

Specified by:

init in interface stream.StatefulProcessor

Throws:

Exception

resetState

public void resetState()
                throws Exception

Specified by:

resetState in interface stream.StatefulProcessor

Throws:

Exception

finish

public void finish()
            throws Exception

Specified by:

finish in interface stream.StatefulProcessor

Throws:

Exception