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Class weka.filters.TimeSeriesDeltaFilter 

java.lang.Object
   |
   +----weka.filters.Filter
           |
           +----weka.filters.AbstractTimeSeriesFilter
                   |
                   +----weka.filters.TimeSeriesTranslateFilter
                           |
                           +----weka.filters.TimeSeriesDeltaFilter
public class TimeSeriesDeltaFilter
extends TimeSeriesTranslateFilter
An instance filter that assumes instances form time-series data and replaces attribute values in the current instance with the difference between the current value and the equivalent attribute attribute value of some previous (or future) instance. For instances where the time-shifted value is unknown either the instance may be dropped, or missing values used.

Valid filter-specific options are:

-R index1,index2-index4,...
Specify list of columns to calculate new values for. First and last are valid indexes. (default none)

-V
Invert matching sense (i.e. calculate for all non-specified columns)

-I num
The number of instances forward to take value differences between. A negative number indicates taking values from a past instance. (default -1)

-M
For instances at the beginning or end of the dataset where the delta values are not known, use missing values (default is to remove those instances).

Author:
Len Trigg (trigg@cs.waikato.ac.nz)

Constructor Index

o TimeSeriesDeltaFilter()

Method Index

o main(String[])
Main method for testing this class.
o setInputFormat(Instances)
Sets the format of the input instances.

Constructors

o TimeSeriesDeltaFilter 
 public TimeSeriesDeltaFilter()

Methods

o setInputFormat 
 public boolean setInputFormat(Instances instanceInfo) throws Exception
Sets the format of the input instances.

Parameters:
instanceInfo - an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).
Returns:
true if the outputFormat may be collected immediately
Throws: UnsupportedAttributeTypeException
if selected attributes are not numeric.
Overrides:
setInputFormat in class TimeSeriesTranslateFilter
o main 
 public static void main(String argv[])
Main method for testing this class.

Parameters:
argv - should contain arguments to the filter: use -h for help 
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