com.soundcloud.lsh

NearestNeighbours

class NearestNeighbours extends Joiner with Serializable

Brute force O(n2) method to compute exact nearest neighbours. As this is a very expensive computation O(n2) an additional sample parameter may be passed such that neighbours are just computed for a random fraction.

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Instance Constructors

  1. new NearestNeighbours(distance: VectorDistance, threshold: Double, fraction: Double)

    distance

    a function defining a metric over a vector space

    threshold

    pairs that are >= to the distance are discarded

    fraction

    compute neighbours for the given fraction

Value Members

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

    Definition Classes
    AnyRef

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

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  3. final def ##(): Int

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  4. final def ==(arg0: AnyRef): Boolean

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  5. final def ==(arg0: Any): Boolean

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  6. final def asInstanceOf[T0]: T0

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  7. def clone(): AnyRef

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    protected[java.lang]
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    @throws( ... )

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

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  9. def equals(arg0: Any): Boolean

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  10. def finalize(): Unit

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    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )

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

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  12. def hashCode(): Int

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  13. final def isInstanceOf[T0]: Boolean

    Definition Classes
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  14. def join(inputMatrix: IndexedRowMatrix): CoordinateMatrix

    Find the k nearest neighbors from a data set for every other object in the same data set.

    Find the k nearest neighbors from a data set for every other object in the same data set. Implementations may be either exact or approximate.

    returns

    a similarity matrix with MatrixEntry(itemA, itemB, similarity).

    Definition Classes
    NearestNeighbours → Joiner

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

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  16. final def notify(): Unit

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  17. final def notifyAll(): Unit

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

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  19. def toString(): String

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  20. final def wait(): Unit

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    @throws( ... )

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

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

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