FeatureSpec

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final def !=(arg0: Any): Boolean

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final def ##(): Int

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final def ==(arg0: Any): Boolean

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final def asInstanceOf[T0]: T0

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def clone(): AnyRef

Attributes
protected[java.lang]
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def compose[S](spec: FeatureSpec[S])(f: (T) ⇒ S): FeatureSpec[T]

Compose with another spec by applying a prepare function to input records first.
Compose with another spec by applying a prepare function to input records first.
Useful for reusing an existing spec for a different input record type.
S
input record type of the other spec
spec
spec to compose with
f
function to prepare input records for the other spec
def cross(k: (String, String))(f: (Double, Double) ⇒ Double): FeatureSpec[T]

Cross feature values of two underlying transformers.
Cross feature values of two underlying transformers.
k
names of transformers to be crossed
f
function to cross feature value pairs
final def eq(arg0: AnyRef): Boolean

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def equals(arg0: Any): Boolean

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def extract[M[_]](input: M[T])(implicit arg0: CollectionType[M]): FeatureExtractor[M, T]

Extract features from an input collection.
Extract features from an input collection.
This is done in two steps, a reduce step over the collection to aggregate feature summary, and a map step to transform values using the summary.
M
input collection type, e.g. Array, List
input
input collection
def extractWithSettings[F](settings: String)(implicit arg0: FeatureBuilder[F], arg1: ClassTag[F]): RecordExtractor[T, F]

Extract features from individual records using settings from a previous session.
Extract features from individual records using settings from a previous session. Since the settings are parsed only once, this is more efficient and is recommended when the input is from an unbounded source, e.g. a stream of events or a backend service.
This bypasses the reduce step in extract and uses feature summary from settings exported in a previous session.
settings
JSON settings from a previous session
def extractWithSettings[M[_]](input: M[T], settings: M[String])(implicit arg0: CollectionType[M]): FeatureExtractor[M, T]

Extract features from an input collection using settings from a previous session.
Extract features from an input collection using settings from a previous session.
This bypasses the reduce step in extract and uses feature summary from settings exported in a previous session.
M
input collection type, e.g. Array, List
input
input collection
settings
JSON settings from a previous session
def finalize(): Unit

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

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def hashCode(): Int

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final def isInstanceOf[T0]: Boolean

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final def ne(arg0: AnyRef): Boolean

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final def notify(): Unit

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final def notifyAll(): Unit

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def optional[A](f: (T) ⇒ Option[A], default: Option[A] = None)(t: Transformer[A, _, _]): FeatureSpec[T]

Add an optional field specification.
Add an optional field specification.
A
extracted feature type
f
function to extract feature Option[A] from record T
default
default for missing values
t
Transformer for extracted feature A
def required[A](f: (T) ⇒ A)(t: Transformer[A, _, _]): FeatureSpec[T]

Add a required field specification.
Add a required field specification.
A
extracted feature type
f
function to extract feature A from record T
t
Transformer for extracted feature A
final def synchronized[T0](arg0: ⇒ T0): T0

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def toString(): String

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final def wait(): Unit

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

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final def wait(arg0: Long): Unit

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Related Docs: object FeatureSpec | package featran

class FeatureSpec[T] extends AnyRef

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

def compose[S](spec: FeatureSpec[S])(f: (T) ⇒ S): FeatureSpec[T]

def cross(k: (String, String))(f: (Double, Double) ⇒ Double): FeatureSpec[T]

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def extract[M[_]](input: M[T])(implicit arg0: CollectionType[M]): FeatureExtractor[M, T]

def extractWithSettings[F](settings: String)(implicit arg0: FeatureBuilder[F], arg1: ClassTag[F]): RecordExtractor[T, F]

def extractWithSettings[M[_]](input: M[T], settings: M[String])(implicit arg0: CollectionType[M]): FeatureExtractor[M, T]

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

def optional[A](f: (T) ⇒ Option[A], default: Option[A] = None)(t: Transformer[A, _, _]): FeatureSpec[T]

def required[A](f: (T) ⇒ A)(t: Transformer[A, _, _]): FeatureSpec[T]

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

def toString(): String

final def wait(): Unit

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

final def wait(arg0: Long): Unit

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