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## weka.filters.unsupervised.instance
Class SparseToNonSparse

    java.lang.Object
      weka.filters.Filter
          weka.filters.unsupervised.instance.SparseToNonSparse

All Implemented Interfaces:
  java.io.Serializable, CapabilitiesHandler, RevisionHandler, StreamableFilter, UnsupervisedFilter

    public class SparseToNonSparse

extends Filter
implements UnsupervisedFilter, StreamableFilter

An instance filter that converts all incoming sparse instances into non-sparse format.

Version:
  $Revision: 5548 $
Author:
  Len Trigg (len@reeltwo.com)
See Also:
  Serialized Form

Constructor Summary
`SparseToNonSparse()`

Method Summary
`Capabilities` | `getCapabilities()` Returns the Capabilities of this filter.
`java.lang.String` | `getRevision()` Returns the revision string.
`java.lang.String` | `globalInfo()` Returns a string describing this filter
`boolean` | `input(Instance instance)` Input an instance for filtering.
`static void` | `main(java.lang.String[] argv)` Main method for testing this class.
`boolean` | `setInputFormat(Instances instanceInfo)` Sets the format of the input instances.

Methods inherited from class weka.filters.Filter
`batchFilterFile, batchFinished, 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

### SparseToNonSparse

    public SparseToNonSparse()

Method Detail

### globalInfo

    public java.lang.String globalInfo()

  Returns a string describing this filter

  Returns:
    a description of the filter suitable for displaying in the explorer/experimenter gui

### getCapabilities

    public Capabilities getCapabilities()

  Returns the Capabilities of this filter.

  Specified by:
    `getCapabilities` in interface `CapabilitiesHandler`
  Overrides:
    `getCapabilities` in class `Filter`
  Returns:
    the capabilities of this object
  See Also:
    `Capabilities`

### setInputFormat

    public boolean setInputFormat(Instances instanceInfo)
                           throws java.lang.Exception

  Sets the format of the input instances.

  Overrides:
    `setInputFormat` in class `Filter`
  Parameters:
    `instanceInfo` - an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).
  Returns:
    true if the outputFormat may be collected immediately
  Throws:
    `java.lang.Exception` - if format cannot be processed

### input

    public boolean input(Instance instance)

  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.

  Overrides:
    `input` in class `Filter`
  Parameters:
    `instance` - the input instance
  Returns:
    true if the filtered instance may now be collected with output().
  Throws:
    `java.lang.IllegalStateException` - if no input structure has been defined

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Overrides:
    `getRevision` in class `Filter`
  Returns:
    the revision

### main

    public static void main(java.lang.String[] argv)

  Main method for testing this class.

  Parameters:
    `argv` - should contain arguments to the filter: use -h for help

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