.. _auto_dataset_curve_to_columns:

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

Expands one or more curve-valued columns in a dataset into a set of flat scalar columns, resampling each curve to a fixed number of points. Use this worker to convert time-history or XY-curve data stored inside dataset cells into a wide tabular format suitable for ML feature engineering or DOE post-processing.

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

Classification: **process**.

Tagged: ``curve expansion``, ``curve flattening``, ``curve_to_columns``, ``dataset reshape``, ``feature engineering``, ``resampling``, ``wide format``.

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 whose cells hold curve (XY) objects; all other scalar columns are preserved in the output.
   * - Curve Column Name
     - column_name
     - scalar
     - —
     - 
     - Name(s) of the curve-valued column(s) to expand; supports multiple selections drawn from the columns of dataset_1.
   * - Number Of Points
     - num_points
     - scalar
     - 100
     - 
     - Number of evenly-spaced points to which every curve is resampled before flattening into columns; default is 100.
   * - Prefix
     - prefix
     - text
     - PNT_
     - 
     - String prefix used to name the generated point columns (e.g., default 'PNT_' produces PNT_1, PNT_2, …); change to avoid name collisions.
   * - Remove Curve Column
     - remove_curve_column
     - select
     - yes
     - 
     - Whether to drop the original curve-valued column(s) from the output dataset after expansion; default 'yes' — set to 'no' to retain the raw curve column.
   * - Sync Curves
     - sync_curves
     - select
     - yes
     - 
     - Controls how curves are synchronised to a common x-axis before resampling: 'yes' aligns on the shared x-range, 'yes_with_min_zero' forces x-start to 0, 'yes_first_last_value' pads with first/last value, 'no' skips synchronisation.
   * - Include X Values
     - include_x
     - select
     - yes
     - 
     - Whether to also emit the resampled x-axis values as additional columns (prefixed by x_prefix); default 'no'.
   * - X Prefix
     - x_prefix
     - text
     - X_
     - 
     - String prefix for the generated x-axis point columns when include_x is 'yes'; default 'x_'.
   * - Add Column Name to Prefix
     - add_col_name
     - select
     - no
     - 
     - Prepends the column name to the Prefix

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - dataset_curve_to_columns_output_1
     - dataset_curve_to_columns_output_1
     - dataset
     - Transformed dataset in which each selected curve column has been replaced by num_points scalar columns (named PREFIX_1 … PREFIX_N), ready for tabular analysis or ML ingestion.

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_columns <https://www.d3view.com/api/workflow/example?id=dataset_curve_to_columns>`_

.. raw:: html

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   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>dataset_curve_to_columns</code>. Schema hash: <code>07210b73232f</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>