.. _auto_dataset_curve_to_bilinear_columns:

*DATASET CURVE TO BILINEAR COLUMNS*
===================================

Expands one or more curve-valued columns in a dataset into a flat set of bilinear (x/y point-pair) columns, resampled to a fixed number of points. Use this worker to convert embedded curve objects into tabular numeric columns suitable for ML preprocessing, DOE, or export.

When to use
-----------

Classification: **process**.

Tagged: ``bilinear_columns``, ``curve_expansion``, ``curve_flatten``, ``curve_to_bilinear``, ``dataset_transform``, ``resampling``, ``sync_curves``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Dataset With Columns
     - dataset_1
     - dataset
     - —
     - 
     - Input dataset containing at least one column that stores curve objects; all other columns are passed through unchanged.
   * - Curve Column Name
     - column_name
     - scalar
     - —
     - 
     - One or more column names (multi-select, driven by dataset_1) whose curve values will be expanded into bilinear point columns.
   * - Number Of Points
     - num_points
     - scalar
     - 100
     - 
     - Number of evenly-spaced resampled points to generate per curve; default is 100 — increase for higher fidelity, decrease for compact representations.
   * - Prefix
     - prefix
     - text
     - PNT_
     - 
     - String prefix used to name the generated point columns (e.g. default 'PNT_' produces columns PNT_1, PNT_2, …); change to avoid name collisions.
   * - Remove Curve Column
     - remove_curve_column
     - select
     - yes
     - 
     - Whether to drop the original curve column(s) after expansion; default 'yes' keeps the output tidy — set to 'no' to retain the source curve alongside the new columns.
   * - Sync Curves
     - sync_curves
     - select
     - yes
     - 
     - Controls how curves are aligned to a common x-axis before resampling: 'yes' syncs on the shared range, 'yes_with_min_zero' forces the range to start at 0, 'yes_first_last_value' uses the first/last value for extrapolation, and 'no' skips synchronisation entirely.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - dataset_curve_to_bilinear_columns_output_1
     - dataset_curve_to_bilinear_columns_output_1
     - dataset
     - Transformed dataset in which each selected curve column has been replaced (or supplemented) by a series of numeric bilinear point columns named <PREFIX>_1 … <PREFIX>_N, with one row per original dataset row.

Disciplines
-----------

- ai_ml.preprocessing
- data.curve.transform
- data.dataset.transform

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=dataset_curve_to_bilinear_columns <https://www.d3view.com/api/workflow/example?id=dataset_curve_to_bilinear_columns>`_

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>dataset_curve_to_bilinear_columns</code>. Schema hash: <code>59c3da35d85d</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>