org.apache.spark.mllib.stat

MultivariateOnlineSummarizer

class MultivariateOnlineSummarizer extends MultivariateStatisticalSummary with Serializable

:: DeveloperApi :: MultivariateOnlineSummarizer implements MultivariateStatisticalSummary to compute the mean, variance, minimum, maximum, counts, and nonzero counts for samples in sparse or dense vector format in a online fashion.

Two MultivariateOnlineSummarizer can be merged together to have a statistical summary of the corresponding joint dataset.

A numerically stable algorithm is implemented to compute sample mean and variance: Reference: variance-wiki Zero elements (including explicit zero values) are skipped when calling add(), to have time complexity O(nnz) instead of O(n) for each column.

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@DeveloperApi()
Linear Supertypes
Serializable, Serializable, MultivariateStatisticalSummary, AnyRef, Any
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  1. MultivariateOnlineSummarizer
  2. Serializable
  3. Serializable
  4. MultivariateStatisticalSummary
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Instance Constructors

  1. new MultivariateOnlineSummarizer()

Value Members

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

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

    Definition Classes
    Any
  3. final def ##(): Int

    Definition Classes
    AnyRef → Any
  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  5. final def ==(arg0: Any): Boolean

    Definition Classes
    Any
  6. def add(sample: Vector): MultivariateOnlineSummarizer.this.type

    Add a new sample to this summarizer, and update the statistical summary.

    Add a new sample to this summarizer, and update the statistical summary.

    sample

    The sample in dense/sparse vector format to be added into this summarizer.

    returns

    This MultivariateOnlineSummarizer object.

  7. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  8. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  9. def count: Long

    Sample size.

  10. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  11. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  12. def finalize(): Unit

    Attributes
    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )
  13. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  14. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  15. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  16. def max: Vector

    Maximum value of each column.

    Maximum value of each column.

    Definition Classes
    MultivariateOnlineSummarizerMultivariateStatisticalSummary
  17. def mean: Vector

    Sample mean vector.

    Sample mean vector.

    Definition Classes
    MultivariateOnlineSummarizerMultivariateStatisticalSummary
  18. def merge(other: MultivariateOnlineSummarizer): MultivariateOnlineSummarizer.this.type

    Merge another MultivariateOnlineSummarizer, and update the statistical summary.

    Merge another MultivariateOnlineSummarizer, and update the statistical summary. (Note that it's in place merging; as a result, this object will be modified.)

    other

    The other MultivariateOnlineSummarizer to be merged.

    returns

    This MultivariateOnlineSummarizer object.

  19. def min: Vector

    Minimum value of each column.

    Minimum value of each column.

    Definition Classes
    MultivariateOnlineSummarizerMultivariateStatisticalSummary
  20. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  21. final def notify(): Unit

    Definition Classes
    AnyRef
  22. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  23. def numNonzeros: Vector

    Number of nonzero elements (including explicitly presented zero values) in each column.

    Number of nonzero elements (including explicitly presented zero values) in each column.

    Definition Classes
    MultivariateOnlineSummarizerMultivariateStatisticalSummary
  24. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  25. def toString(): String

    Definition Classes
    AnyRef → Any
  26. def variance: Vector

    Sample variance vector.

    Sample variance vector. Should return a zero vector if the sample size is 1.

    Definition Classes
    MultivariateOnlineSummarizerMultivariateStatisticalSummary
  27. final def wait(): Unit

    Definition Classes
    AnyRef
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    @throws( ... )
  28. final def wait(arg0: Long, arg1: Int): Unit

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    @throws( ... )
  29. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
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    @throws( ... )

Inherited from Serializable

Inherited from Serializable

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