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## weka.associations.gsp
Class Element

    java.lang.Object
      weka.associations.gsp.Element

All Implemented Interfaces:
  java.io.Serializable, java.lang.Cloneable, RevisionHandler

    public class Element

extends java.lang.Object
implements java.lang.Cloneable, java.io.Serializable, RevisionHandler

Class representing an Element, i.e., a set of events/items.

Version:
  $Revision: 1.2 $
Author:
  Sebastian Beer
See Also:
  Serialized Form

Constructor Summary
`Element()` Constructor
`Element(int size)` Constructor accepting an initial size of the events Array as parameter.

Method Summary
`Element` | `clone()` Returns a deep clone of an Element.
`boolean` | `containsOverOneEvent()` Checks if an Element contains over one event.
`void` | `deleteEvent(java.lang.String position)` Deletes the first or last event of an Element.
`boolean` | `equals(java.lang.Object obj)` Checks if two Elements are equal.
`int[]` | `getEvents()` Returns the events Array of an Element.
`static FastVector` | `getOneElements(Instances instances)` Returns all events of the given data set as Elements containing a single event.
`java.lang.String` | `getRevision()` Returns the revision string.
`boolean` | `isContainedBy(Instance instance)` Checks if an Element is contained by a given Instance.
`boolean` | `isEmpty()` Checks if the Element contains any events.
`static Element` | `merge(Element element1, Element element2)` Merges two Elements into one.
`java.lang.String` | `toNominalString(Instances dataSet)` Returns a String representation of an Element where the numeric value of each event/item is represented by its respective nominal value.
`java.lang.String` | `toString()` Returns a String representation of an Element.

Methods inherited from class java.lang.Object
`getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### Element

    public Element()

  Constructor

### Element

    public Element(int size)

  Constructor accepting an initial size of the events Array as parameter.

  Parameters:
    `size` - the size

Method Detail

### getOneElements

    public static FastVector getOneElements(Instances instances)

  Returns all events of the given data set as Elements containing a single event. The order of events is determined by the header information of the corresponding ARFF file.

  Parameters:
    `instances` - the data set
  Returns:
    the set of 1-Elements

### merge

    public static Element merge(Element element1,
                                Element element2)

  Merges two Elements into one.

  Parameters:
    `element1` - first Element
    `element2` - second Element
  Returns:
    the merged Element

### clone

    public Element clone()

  Returns a deep clone of an Element.

  Overrides:
    `clone` in class `java.lang.Object`
  Returns:
    the cloned Element

### containsOverOneEvent

    public boolean containsOverOneEvent()

  Checks if an Element contains over one event.

  Returns:
    true, if the Element contains over one event, else false

### deleteEvent

    public void deleteEvent(java.lang.String position)

  Deletes the first or last event of an Element.

  Parameters:
    `position` - the position of the event to be deleted (first or last)

### equals

    public boolean equals(java.lang.Object obj)

  Checks if two Elements are equal.

  Overrides:
    `equals` in class `java.lang.Object`
  Returns:
    true, if the two Elements are equal, else false

### getEvents

    public int[] getEvents()

  Returns the events Array of an Element.

  Returns:
    the events Array

### isContainedBy

    public boolean isContainedBy(Instance instance)

  Checks if an Element is contained by a given Instance.

  Parameters:
    `instance` - the given Instance
  Returns:
    true, if the Instance contains the Element, else false

### isEmpty

    public boolean isEmpty()

  Checks if the Element contains any events.

  Returns:
    true, if the Element contains no event, else false

### toNominalString

    public java.lang.String toNominalString(Instances dataSet)

  Returns a String representation of an Element where the numeric value of each event/item is represented by its respective nominal value.

  Parameters:
    `dataSet` - the corresponding data set containing the header information
  Returns:
    the String representation

### toString

    public java.lang.String toString()

  Returns a String representation of an Element.

  Overrides:
    `toString` in class `java.lang.Object`
  Returns:
    the String representation

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Returns:
    the revision

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