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java.lang.Objectweka.filters.Filter
weka.filters.unsupervised.attribute.AddNoise
public class AddNoise
An instance filter that changes a percentage of a given attributes values. The attribute must be nominal. Missing value can be treated as value itself.
Valid options are:-C <col> Index of the attribute to be changed (default last attribute)
-M Treat missing values as an extra value
-P <num> Specify the percentage of noise introduced to the data (default 10)
-S <num> Specify the random number seed (default 1)
| Constructor Summary | |
|---|---|
AddNoise()
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| Method Summary | |
|---|---|
void |
addNoise(Instances instances,
int seed,
int percent,
int attIndex,
boolean useMissing)
add noise to the dataset a given percentage of the instances are changed in the way, that a set of instances are randomly selected using seed. |
java.lang.String |
attributeIndexTipText()
Returns the tip text for this property |
boolean |
batchFinished()
Signify that this batch of input to the filter is finished. |
java.lang.String |
getAttributeIndex()
Get the index of the attribute used. |
Capabilities |
getCapabilities()
Returns the Capabilities of this filter. |
java.lang.String[] |
getOptions()
Gets the current settings of the filter. |
int |
getPercent()
Gets the size of noise data as a percentage of the original set. |
int |
getRandomSeed()
Gets the random number seed. |
java.lang.String |
getRevision()
Returns the revision string. |
boolean |
getUseMissing()
Gets the flag if missing values are treated as extra values. |
java.lang.String |
globalInfo()
Returns a string describing this filter |
boolean |
input(Instance instance)
Input an instance for filtering. |
java.util.Enumeration |
listOptions()
Returns an enumeration describing the available options |
static void |
main(java.lang.String[] argv)
Main method for testing this class. |
java.lang.String |
percentTipText()
Returns the tip text for this property |
java.lang.String |
randomSeedTipText()
Returns the tip text for this property |
void |
setAttributeIndex(java.lang.String attIndex)
Sets index of the attribute used. |
boolean |
setInputFormat(Instances instanceInfo)
Sets the format of the input instances. |
void |
setOptions(java.lang.String[] options)
Parses a given list of options. |
void |
setPercent(int newPercent)
Sets the size of noise data, as a percentage of the original set. |
void |
setRandomSeed(int newSeed)
Sets the random number seed. |
void |
setUseMissing(boolean newUseMissing)
Sets the flag if missing values are treated as extra values. |
java.lang.String |
useMissingTipText()
Returns the tip text for this property |
| Methods inherited from class weka.filters.Filter |
|---|
batchFilterFile, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
public AddNoise()
| Method Detail |
|---|
public java.lang.String globalInfo()
public java.util.Enumeration listOptions()
listOptions in interface OptionHandler
public void setOptions(java.lang.String[] options)
throws java.lang.Exception
-C <col> Index of the attribute to be changed (default last attribute)
-M Treat missing values as an extra value
-P <num> Specify the percentage of noise introduced to the data (default 10)
-S <num> Specify the random number seed (default 1)
setOptions in interface OptionHandleroptions - the list of options as an array of strings
java.lang.Exception - if an option is not supportedpublic java.lang.String[] getOptions()
getOptions in interface OptionHandlerpublic java.lang.String useMissingTipText()
public boolean getUseMissing()
public void setUseMissing(boolean newUseMissing)
newUseMissing - the new flag value.public java.lang.String randomSeedTipText()
public int getRandomSeed()
public void setRandomSeed(int newSeed)
newSeed - the new random number seed.public java.lang.String percentTipText()
public int getPercent()
public void setPercent(int newPercent)
newPercent - the subsample set size, between 0 and 100.public java.lang.String attributeIndexTipText()
public java.lang.String getAttributeIndex()
public void setAttributeIndex(java.lang.String attIndex)
attIndex - the index of the attributepublic Capabilities getCapabilities()
getCapabilities in interface CapabilitiesHandlergetCapabilities in class FilterCapabilities
public boolean setInputFormat(Instances instanceInfo)
throws java.lang.Exception
setInputFormat in class FilterinstanceInfo - an Instances object containing the input
instance structure (any instances contained in the object are
ignored - only the structure is required).
java.lang.Exception - if the input format can't be set
successfully
public boolean input(Instance instance)
throws java.lang.Exception
input in class Filterinstance - the input instance
java.lang.Exception - if the input format was not set
public boolean batchFinished()
throws java.lang.Exception
batchFinished in class Filterjava.lang.Exception - if no input structure has been defined
public void addNoise(Instances instances,
int seed,
int percent,
int attIndex,
boolean useMissing)
instances - is the datasetseed - used for random functionpercent - percentage of instances that are changedattIndex - index of the attribute changeduseMissing - if true missing values are treated as extra valuepublic java.lang.String getRevision()
getRevision in interface RevisionHandlergetRevision in class Filterpublic static void main(java.lang.String[] argv)
argv - should contain arguments to the filter:
use -h for help
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