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Class weka.filters.TimeSeriesDeltaFilter
java.lang.Object
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+----weka.filters.Filter
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+----weka.filters.TimeSeriesTranslateFilter
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+----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).
- Version:
- $Revision: 1.1 $
- Author:
- Len Trigg (trigg@cs.waikato.ac.nz)
-
TimeSeriesDeltaFilter()
-
-
inputFormat(Instances)
- Sets the format of the input instances.
-
main(String[])
- Main method for testing this class.
TimeSeriesDeltaFilter
public TimeSeriesDeltaFilter()
inputFormat
public boolean inputFormat(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: Exception
- if the format couldn't be set successfully
- Overrides:
- inputFormat in class TimeSeriesTranslateFilter
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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