spark-mllib-Transformer.adoc

Transformer

Transformer is the contract in Spark MLlib for transformers that transform one dataset into another.

Transformer is a PipelineStage and so…​FIXME

Transforming Dataset with Extra Parameters — transform Method

Caution

FIXME

Transformer Contract

package org.apache.spark.ml

abstract class Evaluator {
  // only required methods that have no implementation
  def transform(dataset: Dataset[_]): DataFrame
  def copy(extra: ParamMap): Transformer
}

Table 1. Transformer Contract

Method	Description
copy	Used when…​
transform	Used when…​