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java.lang.Objectweka.filters.Filter
weka.filters.unsupervised.attribute.AbstractTimeSeries
weka.filters.unsupervised.attribute.TimeSeriesTranslate
weka.filters.unsupervised.attribute.TimeSeriesDelta
public class TimeSeriesDelta
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 translated values are not known, use missing values
(default is to remove those instances).
Constructor Summary | |
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TimeSeriesDelta()
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Method Summary | |
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java.lang.String |
globalInfo()
Returns a string describing this classifier |
static void |
main(java.lang.String[] argv)
Main method for testing this class. |
boolean |
setInputFormat(Instances instanceInfo)
Sets the format of the input instances. |
Methods inherited from class weka.filters.unsupervised.attribute.AbstractTimeSeries |
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attributeIndicesTipText, batchFinished, fillWithMissingTipText, getAttributeIndices, getFillWithMissing, getInstanceRange, getInvertSelection, getOptions, input, instanceRangeTipText, invertSelectionTipText, listOptions, setAttributeIndices, setAttributeIndicesArray, setFillWithMissing, setInstanceRange, setInvertSelection, setOptions |
Methods inherited from class weka.filters.Filter |
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batchFilterFile, filterFile, getOutputFormat, inputFormat, isOutputFormatDefined, numPendingOutput, output, outputFormat, outputPeek, useFilter |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public TimeSeriesDelta()
Method Detail |
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public java.lang.String globalInfo()
globalInfo
in class TimeSeriesTranslate
public boolean setInputFormat(Instances instanceInfo) throws java.lang.Exception
setInputFormat
in class TimeSeriesTranslate
instanceInfo
- an Instances object containing the input instance
structure (any instances contained in the object are ignored - only the
structure is required).
UnsupportedAttributeTypeException
- if selected
attributes are not numeric.
java.lang.Exception
- if the format couldn't be set successfullypublic static void main(java.lang.String[] argv)
argv
- should contain arguments to the filter: use -h for help
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