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java.lang.Objectweka.filters.Filter
weka.filters.unsupervised.attribute.PrincipalComponents
public class PrincipalComponents
Performs a principal components analysis and transformation of the data.
Dimensionality reduction is accomplished by choosing enough eigenvectors to account for some percentage of the variance in the original data -- default 0.95 (95%).
Based on code of the attribute selection scheme 'PrincipalComponents' by Mark Hall and Gabi Schmidberger.
-D Don't normalize input data.
-R <num> Retain enough PC attributes to account for this proportion of variance in the original data. (default: 0.95)
-A <num> Maximum number of attributes to include in transformed attribute names. (-1 = include all, default: 5)
-M <num> Maximum number of PC attributes to retain. (-1 = include all, default: -1)
| Constructor Summary | |
|---|---|
PrincipalComponents()
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| Method Summary | |
|---|---|
boolean |
batchFinished()
Signify that this batch of input to the filter is finished. |
java.lang.String |
centerDataTipText()
Returns the tip text for this property |
Capabilities |
getCapabilities()
Returns the capabilities of this evaluator. |
boolean |
getCenterData()
Get whether to center (rather than standardize) the data. |
int |
getMaximumAttributeNames()
Gets maximum number of attributes to include in transformed attribute names. |
int |
getMaximumAttributes()
Gets maximum number of PC attributes to retain. |
java.lang.String[] |
getOptions()
Gets the current settings of the filter. |
java.lang.String |
getRevision()
Returns the revision string. |
double |
getVarianceCovered()
Gets the proportion of total variance to account for when retaining principal components. |
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[] args)
Main method for running this filter. |
java.lang.String |
maximumAttributeNamesTipText()
Returns the tip text for this property. |
java.lang.String |
maximumAttributesTipText()
Returns the tip text for this property. |
void |
setCenterData(boolean center)
Set whether to center (rather than standardize) the data. |
boolean |
setInputFormat(Instances instanceInfo)
Sets the format of the input instances. |
void |
setMaximumAttributeNames(int value)
Sets maximum number of attributes to include in transformed attribute names. |
void |
setMaximumAttributes(int value)
Sets maximum number of PC attributes to retain. |
void |
setOptions(java.lang.String[] options)
Parses a list of options for this object. |
void |
setVarianceCovered(double value)
Sets the amount of variance to account for when retaining principal components. |
java.lang.String |
varianceCoveredTipText()
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 PrincipalComponents()
| 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
-D Don't normalize input data.
-R <num> Retain enough PC attributes to account for this proportion of variance in the original data. (default: 0.95)
-A <num> Maximum number of attributes to include in transformed attribute names. (-1 = include all, default: 5)
-M <num> Maximum number of PC attributes to retain. (-1 = include all, 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 centerDataTipText()
public void setCenterData(boolean center)
center - true if the data is to be
centered rather than standardizedpublic boolean getCenterData()
public java.lang.String varianceCoveredTipText()
public void setVarianceCovered(double value)
value - the proportion of total variance to account forpublic double getVarianceCovered()
public java.lang.String maximumAttributeNamesTipText()
public void setMaximumAttributeNames(int value)
value - the maximum number of attributespublic int getMaximumAttributeNames()
public java.lang.String maximumAttributesTipText()
public void setMaximumAttributes(int value)
value - the maximum number of attributespublic int getMaximumAttributes()
public 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.IllegalStateException - if no input format has been set
java.lang.Exception - if conversion fails
public boolean batchFinished()
throws java.lang.Exception
batchFinished in class Filterjava.lang.NullPointerException - if no input structure has been defined,
java.lang.Exception - if there was a problem finishing the batch.public java.lang.String getRevision()
getRevision in interface RevisionHandlergetRevision in class Filterpublic static void main(java.lang.String[] args)
args - should contain arguments to the filter: use -h for help
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