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java.lang.Object weka.filters.Filter weka.filters.unsupervised.attribute.AbstractTimeSeries weka.filters.unsupervised.attribute.TimeSeriesTranslate weka.filters.unsupervised.attribute.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 delta
values are not known, use missing values (default is to remove those
instances).
Field Summary |
Fields inherited from class weka.filters.unsupervised.attribute.AbstractTimeSeries |
m_FillWithMissing, m_History, m_InstanceRange, m_SelectedCols |
Fields inherited from class weka.filters.Filter |
m_NewBatch |
Constructor Summary | |
TimeSeriesDelta()
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Method Summary | |
java.lang.String |
globalInfo()
Returns a string describing this classifier |
static void |
main(java.lang.String[] argv)
Main method for testing this class. |
protected Instance |
mergeInstances(Instance source,
Instance dest)
Creates a new instance the same as one instance (the "destination") but with some attribute values copied from another instance (the "source") |
boolean |
setInputFormat(Instances instanceInfo)
Sets the format of the input instances. |
Methods inherited from class weka.filters.unsupervised.attribute.AbstractTimeSeries |
attributeIndicesTipText, batchFinished, fillWithMissingTipText, getAttributeIndices, getFillWithMissing, getInstanceRange, getInvertSelection, getOptions, historyInput, input, instanceRangeTipText, invertSelectionTipText, listOptions, resetHistory, setAttributeIndices, setAttributeIndicesArray, setFillWithMissing, setInstanceRange, setInvertSelection, setOptions |
Methods inherited from class weka.filters.Filter |
batchFilterFile, bufferInput, copyStringValues, copyStringValues, filterFile, flushInput, getInputFormat, getInputStringIndex, getOutputFormat, getOutputStringIndex, getStringIndices, inputFormat, inputFormatPeek, isOutputFormatDefined, numPendingOutput, output, outputFormat, outputFormatPeek, outputPeek, push, resetQueue, setOutputFormat, useFilter |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public TimeSeriesDelta()
Method Detail |
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
protected Instance mergeInstances(Instance source, Instance dest)
mergeInstances
in class TimeSeriesTranslate
source
- the source instancedest
- the destination instance
java.lang.Exception
- if a problem occurs during mergingpublic static void main(java.lang.String[] argv)
argv
- should contain arguments to the filter: use -h for help
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