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java.lang.Object | +--weka.filters.Filter | +--weka.filters.StringToNominalFilter
Converts a string attribute (i.e. unspecified number of values) to nominal (i.e. set number of values). You should ensure that all string values that will appear are represented in the dataset.
Valid filter-specific options are:
-C col
Index of the attribute to be changed. (default last)
Field Summary |
Fields inherited from class weka.filters.Filter |
m_Debug, m_NewBatch |
Constructor Summary | |
StringToNominalFilter()
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Method Summary | |
boolean |
batchFinished()
Signifies that this batch of input to the filter is finished. |
int |
getAttributeIndex()
Get the index of the attribute used. |
String[] |
getOptions()
Gets the current settings of the filter. |
boolean |
input(Instance instance)
Input an instance for filtering. |
Enumeration |
listOptions()
Returns an enumeration describing the available options. |
static void |
main(String[] argv)
Main method for testing this class. |
void |
setAttributeIndex(int attIndex)
Sets index of the attribute used. |
boolean |
setInputFormat(Instances instanceInfo)
Sets the format of the input instances. |
void |
setOptions(String[] options)
Parses the options for this object. |
Methods inherited from class weka.filters.Filter |
batchFilterFile, bufferInput, copyStringValues, copyStringValues, filterFile, flushInput, getInputFormat, getInputStringIndex, getOutputFormat, getOutputStringIndex, getStringIndices, inputFormat, isOutputFormatDefined, numPendingOutput, output, outputFormat, outputFormatPeek, outputPeek, push, resetQueue, setOutputFormat, useFilter |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public StringToNominalFilter()
Method Detail |
public boolean setInputFormat(Instances instanceInfo) throws Exception
setInputFormat
in class Filter
instanceInfo
- an Instances object containing the input
instance structure (any instances contained in the object are
ignored - only the structure is required).
UnsupportedAttributeTypeException
- if the selected attribute
a string attribute.
Exception
- if the input format can't be set
successfully.public boolean input(Instance instance)
input
in class Filter
instance
- the input instance.
IllegalStateException
- if no input structure has been defined.public boolean batchFinished()
batchFinished
in class Filter
IllegalStateException
- if no input structure has been defined.public Enumeration listOptions()
listOptions
in interface OptionHandler
public void setOptions(String[] options) throws Exception
-C col
The column containing the values to be merged. (default last)
setOptions
in interface OptionHandler
options
- the list of options as an array of strings
Exception
- if an option is not supportedpublic String[] getOptions()
getOptions
in interface OptionHandler
public int getAttributeIndex()
public void setAttributeIndex(int attIndex)
public static void main(String[] argv)
argv
- should contain arguments to the filter:
use -h for help
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