.. _auto_dataset_curve_column_to_matrix:

*CONVERT A CURVE COLUMN TO A MATRIX*
====================================

Reads a curve column from a dataset, extracts the y-point arrays from each curve, and reshapes them into a fixed-width numeric matrix appended as a new column. Use this worker when downstream ML or statistical steps require tabular (matrix) representations of curve data.

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

Classification: **process**.

Tagged: ``curve``, ``curve_column_to_matrix``, ``dataset_transform``, ``matrix``, ``reshape``, ``tabular``.

Inputs
------

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   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Dataset
     - dataset_1
     - dataset
     - —
     - 
     - Input dataset that must contain at least one curve-typed column; leave unconnected only if the dataset is supplied dynamically by an upstream worker.
   * - Curve Column
     - cols
     - select
     - —
     - ✓
     - Name of the curve column within dataset_1 whose y-point arrays will be flattened into the output matrix; must be selected from the columns of the connected dataset.
   * - Number Of  Columns For Matrix
     - matrix_cols
     - scalar
     - 2
     - 
     - Number of columns to split the curve y-points into when forming the matrix (integer, default 2); increase to widen the output matrix when curves have more y-points per row.
   * - Column Name
     - new_col_name
     - scalar
     - Matrix
     - 
     - Name assigned to the new matrix column appended to the output dataset (string, default "Matrix"); override to avoid naming collisions when multiple matrix columns are created in a workflow.

Outputs
-------

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   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - Transformed Dataset
     - dataset_column_to_matrix
     - dataset
     - A copy of the input dataset with the selected curve column replaced or augmented by a new matrix column whose rows contain the reshaped y-point arrays, formatted as a d3VIEW dataset.

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

- 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_column_to_matrix <https://www.d3view.com/api/workflow/example?id=dataset_curve_column_to_matrix>`_

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>dataset_curve_column_to_matrix</code>. Schema hash: <code>7a9a82b39ac6</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>