Extract features from a input collection.
Extract features from a 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.
input collection type, e.g. Array
, List
input collection
Extract features from a input collection using settings from a previous session.
Extract features from a 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.
input collection type, e.g. Array
, List
input collection
JSON settings from a previous session
Add an optional field specification.
Add an optional field specification.
extracted feature type
function to extract feature Option[A]
from record T
default for missing values
Transformer for extracted feature A
Add a required field specification.
Add a required field specification.
extracted feature type
function to extract feature A
from record T
Transformer for extracted feature A
Encapsulate specification for feature extraction and transformation.
input record type to extract features from