类 Reorder
java.lang.Object
weka.filters.Filter
weka.filters.unsupervised.attribute.Reorder
- 所有已实现的接口:
Serializable
,CapabilitiesHandler
,OptionHandler
,RevisionHandler
,StreamableFilter
,UnsupervisedFilter
A filter that generates output with a new order of the attributes. Useful if one wants to move an attribute to the end to use it as class attribute (e.g. with using "-R 2-last,1").
But it's not only possible to change the order of all the attributes, but also to leave out attributes. E.g. if you have 10 attributes, you can generate the following output order: 1,3,5,7,9,10 or 10,1-5.
You can also duplicate attributes, e.g. for further processing later on: e.g. 1,1,1,4,4,4,2,2,2 where the second and the third column of each attribute are processed differently and the first one, i.e. the original one is kept.
One can simply inverse the order of the attributes via 'last-first'.
After appyling the filter, the index of the class attribute is the last attribute. Valid options are:
But it's not only possible to change the order of all the attributes, but also to leave out attributes. E.g. if you have 10 attributes, you can generate the following output order: 1,3,5,7,9,10 or 10,1-5.
You can also duplicate attributes, e.g. for further processing later on: e.g. 1,1,1,4,4,4,2,2,2 where the second and the third column of each attribute are processed differently and the first one, i.e. the original one is kept.
One can simply inverse the order of the attributes via 'last-first'.
After appyling the filter, the index of the class attribute is the last attribute. Valid options are:
-R <index1,index2-index4,...> Specify list of columns to copy. First and last are valid indexes. (default first-last)
- 版本:
- $Revision: 6249 $
- 作者:
- FracPete (fracpete at waikato dot ac dot nz)
- 另请参阅:
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构造器概要
构造器 -
方法概要
修饰符和类型方法说明Returns the tip text for this propertyGet the current range selectionReturns the Capabilities of this filter.String[]
Gets the current settings of the filter.Returns the revision string.Returns a string describing this filterboolean
Input an instance for filtering.Returns an enumeration describing the available options.static void
Main method for testing this class.void
setAttributeIndices
(String rangeList) Set which attributes are to be copied (or kept if invert is true)void
setAttributeIndicesArray
(int[] attributes) Set which attributes are to be copied (or kept if invert is true)boolean
setInputFormat
(Instances instanceInfo) Sets the format of the input instances.void
setOptions
(String[] options) Parses a given list of options.从类继承的方法 weka.filters.Filter
batchFilterFile, batchFinished, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper
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构造器详细资料
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Reorder
public Reorder()
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方法详细资料
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listOptions
Returns an enumeration describing the available options.- 指定者:
listOptions
在接口中OptionHandler
- 返回:
- an enumeration of all the available options.
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setOptions
Parses a given list of options. Valid options are:-R <index1,index2-index4,...> Specify list of columns to copy. First and last are valid indexes. (default first-last)
- 指定者:
setOptions
在接口中OptionHandler
- 参数:
options
- the list of options as an array of strings- 抛出:
Exception
- if an option is not supported
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getOptions
Gets the current settings of the filter.- 指定者:
getOptions
在接口中OptionHandler
- 返回:
- an array of strings suitable for passing to setOptions
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getCapabilities
Returns the Capabilities of this filter.- 指定者:
getCapabilities
在接口中CapabilitiesHandler
- 覆盖:
getCapabilities
在类中Filter
- 返回:
- the capabilities of this object
- 另请参阅:
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setInputFormat
Sets the format of the input instances.- 覆盖:
setInputFormat
在类中Filter
- 参数:
instanceInfo
- an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).- 返回:
- true if the outputFormat may be collected immediately
- 抛出:
Exception
- if a problem occurs setting the input format
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input
Input an instance for filtering. Ordinarily the instance is processed and made available for output immediately. Some filters require all instances be read before producing output.- 覆盖:
input
在类中Filter
- 参数:
instance
- the input instance- 返回:
- true if the filtered instance may now be collected with output().
- 抛出:
IllegalStateException
- if no input format has been defined.
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globalInfo
Returns a string describing this filter- 返回:
- a description of the filter suitable for displaying in the explorer/experimenter gui
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getAttributeIndices
Get the current range selection- 返回:
- a string containing a comma separated list of ranges
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attributeIndicesTipText
Returns the tip text for this property- 返回:
- tip text for this property suitable for displaying in the explorer/experimenter gui
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setAttributeIndices
Set which attributes are to be copied (or kept if invert is true)- 参数:
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
Note: use this method before you callsetInputFormat(Instances)
, since the output format is determined in that method.- 抛出:
Exception
- if an invalid range list is supplied
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setAttributeIndicesArray
Set which attributes are to be copied (or kept if invert is true)- 参数:
attributes
- an array containing indexes of attributes to select. Since the array will typically come from a program, attributes are indexed from 0.
Note: use this method before you callsetInputFormat(Instances)
, since the output format is determined in that method.- 抛出:
Exception
- if an invalid set of ranges is supplied
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getRevision
Returns the revision string.- 指定者:
getRevision
在接口中RevisionHandler
- 覆盖:
getRevision
在类中Filter
- 返回:
- the revision
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main
Main method for testing this class.- 参数:
argv
- should contain arguments to the filter: use -h for help
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