p>Most preprocessing transforms in NovaML follow the functor pattern: transform(X) both fits the transformer to the data and applies the transformation. For separate fitting and transforming (e.g., when you want to apply the same transformation to test data), you can use the fitted transformer directly on new data.</p></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../core_concepts/">« Core Concepts</a><a class="docs-footer-nextpage" href="../model_training/">Model Training »</a><