类 ReservoirSample
java.lang.Object
weka.filters.Filter
weka.filters.unsupervised.instance.ReservoirSample
- 所有已实现的接口:
Serializable
,CapabilitiesHandler
,OptionHandler
,RevisionHandler
,StreamableFilter
,UnsupervisedFilter
public class ReservoirSample
extends Filter
implements UnsupervisedFilter, OptionHandler, StreamableFilter
Produces a random subsample of a dataset using the reservoir sampling Algorithm "R" by Vitter. The original data set does not have to fit into main memory, but the reservoir does.
BibTeX:
@article{Vitter1985, author = {J. S. Vitter}, journal = {ACM Transactions on Mathematical Software}, number = {1} volume = {11} pages = {37-57}, title = {Random Sampling with a Reservoir}, year = {1985} }Valid options are:
-S <num> Specify the random number seed (default 1)
-Z <num> The size of the output dataset - number of instances (default 100)
- 版本:
- $Revision: 5562 $
- 作者:
- Mark Hall (mhall{[at]}pentaho{[dot]}org)
- 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boolean
Signify that this batch of input to the filter is finished.Returns the Capabilities of this filter.String[]
Gets the current settings of the filter.int
Gets the random number seed.Returns the revision string.int
Gets the subsample size.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.Returns the tip text for this propertyReturns the tip text for this propertyboolean
setInputFormat
(Instances instanceInfo) Sets the format of the input instances.void
setOptions
(String[] options) Parses a given list of options.void
setRandomSeed
(int newSeed) Sets the random number seed.void
setSampleSize
(int newSampleSize) Sets the size of the subsample.从类继承的方法 weka.filters.Filter
batchFilterFile, 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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ReservoirSample
public ReservoirSample()
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方法详细资料
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globalInfo
Returns a string describing this filter- 返回:
- a description of the classifier suitable for displaying in the explorer/experimenter gui
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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:-S <num> Specify the random number seed (default 1)
-Z <num> The size of the output dataset - number of instances (default 100)
- 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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randomSeedTipText
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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getRandomSeed
public int getRandomSeed()Gets the random number seed.- 返回:
- the random number seed.
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setRandomSeed
public void setRandomSeed(int newSeed) Sets the random number seed.- 参数:
newSeed
- the new random number seed.
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sampleSizeTipText
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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getSampleSize
public int getSampleSize()Gets the subsample size.- 返回:
- the subsample size
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setSampleSize
public void setSampleSize(int newSampleSize) Sets the size of the subsample.- 参数:
newSampleSize
- size of the subsample.
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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 the input format can't be set successfully
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input
Input an instance for filtering. Filter requires all training 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 structure has been defined
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batchFinished
public boolean batchFinished()Signify that this batch of input to the filter is finished. If the filter requires all instances prior to filtering, output() may now be called to retrieve the filtered instances.- 覆盖:
batchFinished
在类中Filter
- 返回:
- true if there are instances pending output
- 抛出:
IllegalStateException
- if no input structure has been defined
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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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