org.apache.spark.mllib.fpm

PrefixSpan

class PrefixSpan extends Logging with Serializable

:: Experimental ::

A parallel PrefixSpan algorithm to mine frequent sequential patterns. The PrefixSpan algorithm is described in J. Pei, et al., PrefixSpan: Mining Sequential Patterns Efficiently by Prefix-Projected Pattern Growth (http://doi.org/10.1109/ICDE.2001.914830).

Annotations
@Experimental() @Since( "1.5.0" )
Source
PrefixSpan.scala
See also

Sequential Pattern Mining (Wikipedia)

Linear Supertypes
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Instance Constructors

  1. new PrefixSpan()

    Constructs a default instance with default parameters {minSupport: 0.1, maxPatternLength: 10, maxLocalProjDBSize: 32000000L}.

    Constructs a default instance with default parameters {minSupport: 0.1, maxPatternLength: 10, maxLocalProjDBSize: 32000000L}.

    Annotations
    @Since( "1.5.0" )

Value Members

  1. final def !=(arg0: AnyRef): Boolean

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  2. final def !=(arg0: Any): Boolean

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  10. def finalize(): Unit

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  11. final def getClass(): Class[_]

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  12. def getMaxLocalProjDBSize: Long

    Gets the maximum number of items allowed in a projected database before local processing.

    Gets the maximum number of items allowed in a projected database before local processing.

    Annotations
    @Since( "1.5.0" )

  13. def getMaxPatternLength: Int

    Gets the maximal pattern length (i.

    Gets the maximal pattern length (i.e. the length of the longest sequential pattern to consider.

    Annotations
    @Since( "1.5.0" )

  14. def getMinSupport: Double

    Get the minimal support (i.

    Get the minimal support (i.e. the frequency of occurrence before a pattern is considered frequent).

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    @Since( "1.5.0" )

  15. def hashCode(): Int

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  16. final def isInstanceOf[T0]: Boolean

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  17. def isTraceEnabled(): Boolean

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  18. def log: Logger

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  19. def logDebug(msg: ⇒ String, throwable: Throwable): Unit

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  20. def logDebug(msg: ⇒ String): Unit

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  21. def logError(msg: ⇒ String, throwable: Throwable): Unit

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  22. def logError(msg: ⇒ String): Unit

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  23. def logInfo(msg: ⇒ String, throwable: Throwable): Unit

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  24. def logInfo(msg: ⇒ String): Unit

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  25. def logName: String

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  26. def logTrace(msg: ⇒ String, throwable: Throwable): Unit

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  27. def logTrace(msg: ⇒ String): Unit

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  28. def logWarning(msg: ⇒ String, throwable: Throwable): Unit

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  29. def logWarning(msg: ⇒ String): Unit

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  30. final def ne(arg0: AnyRef): Boolean

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  31. final def notify(): Unit

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  32. final def notifyAll(): Unit

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  33. def run[Item, Itemset <: Iterable[Item], Sequence <: Iterable[Itemset]](data: JavaRDD[Sequence]): PrefixSpanModel[Item]

    A Java-friendly version of run() that reads sequences from a JavaRDD and returns frequent sequences in a PrefixSpanModel.

    A Java-friendly version of run() that reads sequences from a JavaRDD and returns frequent sequences in a PrefixSpanModel.

    Item

    item type

    Itemset

    itemset type, which is an Iterable of Items

    Sequence

    sequence type, which is an Iterable of Itemsets

    data

    ordered sequences of itemsets stored as Java Iterable of Iterables

    returns

    a PrefixSpanModel that contains the frequent sequential patterns

    Annotations
    @Since( "1.5.0" )

  34. def run[Item](data: RDD[Array[Array[Item]]])(implicit arg0: ClassTag[Item]): PrefixSpanModel[Item]

    Finds the complete set of frequent sequential patterns in the input sequences of itemsets.

    Finds the complete set of frequent sequential patterns in the input sequences of itemsets.

    data

    sequences of itemsets.

    returns

    a PrefixSpanModel that contains the frequent patterns

    Annotations
    @Since( "1.5.0" )

  35. def setMaxLocalProjDBSize(maxLocalProjDBSize: Long): PrefixSpan.this.type

    Sets the maximum number of items (including delimiters used in the internal storage format) allowed in a projected database before local processing (default: 32000000L).

    Sets the maximum number of items (including delimiters used in the internal storage format) allowed in a projected database before local processing (default: 32000000L).

    Annotations
    @Since( "1.5.0" )

  36. def setMaxPatternLength(maxPatternLength: Int): PrefixSpan.this.type

    Sets maximal pattern length (default: 10).

    Sets maximal pattern length (default: 10).

    Annotations
    @Since( "1.5.0" )

  37. def setMinSupport(minSupport: Double): PrefixSpan.this.type

    Sets the minimal support level (default: 0.1).

    Sets the minimal support level (default: 0.1).

    Annotations
    @Since( "1.5.0" )

  38. final def synchronized[T0](arg0: ⇒ T0): T0

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  39. def toString(): String

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  40. final def wait(): Unit

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  41. final def wait(arg0: Long, arg1: Int): Unit

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  42. final def wait(arg0: Long): Unit

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Inherited from Serializable

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