breeze.numerics

Scaling

trait Scaling extends AnyRef

Scaling utilities.

Often, in order to avoid underflow, we can offload some of the exponent of a double into an int. To make things more efficient, we can actually share that exponent between doubles.

The scales used in this trait are in log space: they can be safely added and subtracted.

Linear Supertypes
AnyRef, Any
Known Subclasses
Scaling
Ordering
  1. Alphabetic
  2. By inheritance
Inherited
  1. Scaling
  2. AnyRef
  3. Any
  1. Hide All
  2. Show all
Learn more about member selection
Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract val scaleConstant: Int

    the largest (log) power of two we want to deal with

Concrete 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. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  7. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  8. def computeScaleDelta(scores: Array[Double]): Int

    Computes the log power of two we'd need to scale by so that the max double is between (2 ** scaleConstant, 2 ** -scaleConstant).

    Computes the log power of two we'd need to scale by so that the max double is between (2 ** scaleConstant, 2 ** -scaleConstant).

    scores
    returns

  9. def determineScale(score: Double, oldScale: Int): Int

  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]
    Definition Classes
    AnyRef
    Annotations
    @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. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  17. final def notify(): Unit

    Definition Classes
    AnyRef

  18. final def notifyAll(): Unit

    Definition Classes
    AnyRef

  19. def scaleArray(scores: Array[Double], currentScale: Int): Int

    Ensures that the max double is between (2**scaleConstant,2**-scaleConstant), scaling the array as necessary.

    Ensures that the max double is between (2**scaleConstant,2**-scaleConstant), scaling the array as necessary.

    scores
    currentScale
    returns

    newScale

  20. def scaleArrayToScale(scores: Array[Double], currentScale: Int, targetScale: Int): Unit

  21. def scaleValue(score: Double, currentScale: Int, targetScale: Int): Double

    Converts the scaled value into "normal" space

  22. def sumArrays(src: Array[Double], srcScale: Int, dest: Array[Double], destScale: Int): Int

    Sums src into dest assuming they're at different scales.

    Sums src into dest assuming they're at different scales. src may be longer than dest, which is useful for allocating a large work buffer.

    src
    srcScale
    dest
    destScale
    returns

    the new scale

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

    Definition Classes
    AnyRef

  24. def toLogSpace(score: Double, currentScale: Int): Double

  25. def toString(): String

    Definition Classes
    AnyRef → Any

  26. def unscaleValue(score: Double, currentScale: Int): Double

    Converts the scaled value into "normal" space

  27. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from AnyRef

Inherited from Any

Ungrouped