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Class weka.filters.NumericTransformFilter
java.lang.Object
|
+----weka.filters.Filter
|
+----weka.filters.NumericTransformFilter
- public class NumericTransformFilter
- extends Filter
- implements OptionHandler
Transforms numeric attributes using a
given transformation method.
Valid filter-specific options are:
-R index1,index2-index4,...
Specify list of columns to transform. First and last are valid indexes.
(default none). Non-numeric columns are skipped.
-V
Invert matching sense.
-C string
Name of the class containing the method used for transformation.
(default java.lang.Math)
-M string
Name of the method used for the transformation.
(default abs)
- Author:
- Eibe Frank (eibe@cs.waikato.ac.nz)
-
NumericTransformFilter()
- Default constructor -- sets the default transform method
to java.lang.Math.abs().
-
attributeIndicesTipText()
- Returns the tip text for this property
-
getAttributeIndices()
- Get the current range selection
-
getClassName()
- Get the class containing the transformation method.
-
getInvertSelection()
- Get whether the supplied columns are to be transformed or not
-
getMethodName()
- Get the transformation method.
-
getOptions()
- Gets the current settings of the filter.
-
input(Instance)
- Input an instance for filtering.
-
listOptions()
- Returns an enumeration describing the available options
-
main(String[])
- Main method for testing this class.
-
setAttributeIndices(String)
- Set which attributes are to be transformed (or kept if invert is true).
-
setAttributeIndicesArray(int[])
- Set which attributes are to be transformed (or kept if invert is true)
-
setClassName(String)
- Sets the class containing the transformation method.
-
setInputFormat(Instances)
- Sets the format of the input instances.
-
setInvertSelection(boolean)
- Set whether selected columns should be transformed or not.
-
setMethodName(String)
- Set the transformation method.
-
setOptions(String[])
- Parses the options for this object.
NumericTransformFilter
public NumericTransformFilter()
- Default constructor -- sets the default transform method
to java.lang.Math.abs().
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: Exception
- if the input format can't be set
successfully
- Overrides:
- setInputFormat in class Filter
input
public boolean input(Instance instance) throws Exception
- Input an instance for filtering. The instance is processed
and made available for output immediately.
- Parameters:
- instance - the input instance
- Returns:
- true if the filtered instance may now be
collected with output().
- Throws: IllegalStateException
- if no input format has been set.
- Throws: InvocationTargetException
- if there is a problem applying
the configured transform method.
- Overrides:
- input in class Filter
listOptions
public Enumeration listOptions()
- Returns an enumeration describing the available options
- Returns:
- an enumeration of all the available options
setOptions
public void setOptions(String options[]) throws Exception
- Parses the options for this object. Valid options are:
-R index1,index2-index4,...
Specify list of columns to transform. First and last are valid indexes.
(default none). Non-numeric columns are skipped.
-V
Invert matching sense.
-C string
Name of the class containing the method used for transformation.
(default java.lang.Math)
-M string
Name of the method used for the transformation.
(default abs)
- Parameters:
- options - the list of options as an array of strings
- Throws: Exception
- if an option is not supported
getOptions
public String[] getOptions()
- Gets the current settings of the filter.
- Returns:
- an array of strings suitable for passing to setOptions
getClassName
public String getClassName()
- Get the class containing the transformation method.
- Returns:
- string describing the class
setClassName
public void setClassName(String name) throws ClassNotFoundException
- Sets the class containing the transformation method.
- Parameters:
- name - the name of the class
- Throws: ClassNotFoundException
- if class can't be found
getMethodName
public String getMethodName()
- Get the transformation method.
- Returns:
- string describing the transformation method.
setMethodName
public void setMethodName(String name) throws NoSuchMethodException
- Set the transformation method.
- Parameters:
- name - the name of the method
- Throws: NoSuchMethodException
- if method can't be found in class
getInvertSelection
public boolean getInvertSelection()
- Get whether the supplied columns are to be transformed or not
- Returns:
- true if the supplied columns will be kept
setInvertSelection
public void setInvertSelection(boolean invert)
- Set whether selected columns should be transformed or not.
- Parameters:
- invert - the new invert setting
attributeIndicesTipText
public String attributeIndicesTipText()
- Returns the tip text for this property
- Returns:
- tip text for this property suitable for
displaying in the explorer/experimenter gui
getAttributeIndices
public String getAttributeIndices()
- Get the current range selection
- Returns:
- a string containing a comma separated list of ranges
setAttributeIndices
public void setAttributeIndices(String rangeList)
- Set which attributes are to be transformed (or kept if invert is true).
- Parameters:
- rangeList - a string representing the list of attributes. Since
the string will typically come from a user, attributes are indexed from
1.
eg:
first-3,5,6-last
- Throws: InvalidArgumentException
- if an invalid range list is supplied
setAttributeIndicesArray
public void setAttributeIndicesArray(int attributes[])
- Set which attributes are to be transformed (or kept if invert is true)
- Parameters:
- attributes - an array containing indexes of attributes to select.
Since the array will typically come from a program, attributes are indexed
from 0.
- Throws: InvalidArgumentException
- if an invalid set of ranges is supplied
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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