com.redhat.et.silex.histogram

HistogramMethods

abstract class HistogramMethods[T] extends Serializable

Interface for enriched histogramming and counting methods on sequence-like objects

T

The element type of the sequence

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Instance Constructors

  1. new HistogramMethods()

Abstract Value Members

  1. abstract def countBy[U](f: (T) ⇒ U): Map[U, Long]

    Count the occurrences of values returned by a function applied to RDD rows

    Count the occurrences of values returned by a function applied to RDD rows

    U

    The return type of the function

    f

    The function to apply to each RDD row

    returns

    A Map from occurring values to their counts

  2. abstract def countByFlat[U](f: (T) ⇒ TraversableOnce[U]): Map[U, Long]

    Count the occurrences of values in a sequence returned by a function applied to RDD rows

    Count the occurrences of values in a sequence returned by a function applied to RDD rows

    U

    The element type of the sequence returned by the function

    f

    The function to apply to each RDD row: returns a sequence of values

    returns

    A Map from occurring values to their counts

  3. abstract def histBy[U](f: (T) ⇒ U, normalized: Boolean = false, cumulative: Boolean = false): Seq[(U, Double)]

    Histogram the occurrences of values returned by a function applied to RDD rows

    Histogram the occurrences of values returned by a function applied to RDD rows

    U

    The return type of the function

    f

    The function to apply to each RDD row

    normalized

    When true, histogram counts are normalized to sum to 1

    cumulative

    When true, histogram counts are cumulative

    returns

    A sequence ((u0, n0), (u1, n1), ...), sorted in decreasing order of counts nj

    Note

    When both cumulative and normalized are true, "counts" are analoglous to a sampled CDF

  4. abstract def histByFlat[U](f: (T) ⇒ TraversableOnce[U], normalized: Boolean = false, cumulative: Boolean = false): Seq[(U, Double)]

    Histogram the occurrences of values in a sequence returned by a function applied to RDD rows

    Histogram the occurrences of values in a sequence returned by a function applied to RDD rows

    U

    The element type of the sequence returned by the function

    f

    The function to apply to each RDD row: returns a sequence of values

    normalized

    When true, histogram counts are normalized to sum to 1

    cumulative

    When true, histogram counts are cumulative

    returns

    A sequence ((u0, n0), (u1, n1), ...), sorted in decreasing order of counts nj

    Note

    When both cumulative and normalized are true, "counts" are analoglous to a sampled CDF

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