-
sklearn Pipeline and ColumnTransformer: preprocessing that cannot leak
This tutorial targets scikit-learn 1.9.0 , the current stable release as of August 2026. The current documentation describes Pipeline as the mechanism for assembling preprocessing and estimators so th
-
Spark ML feature pipelines: VectorAssembler, StringIndexer, OneHotEncoder, and the Pipeline API
Machine learning models rarely consume raw tables directly. Before training, data usually needs cleaning, categorical encoding, feature assembly, and a consistent transformation path for future predic