.. _auto_curves_merge:

*CREATE A NEW CURVE BY ADDING THE X-VALUES OF THE SECOND CURVE TO THE BASE-CURVE.*
==================================================================================

Merges two curves into one by concatenating the x/y points of the second curve onto the base curve. Supports optional x-axis sorting, x-offset alignment before merging, and configurable handling of duplicate x-values at the join point.

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

Classification: **process**.

Tagged: ``append``, ``concatenate``, ``curve_merge``, ``curves``, ``identical_points``, ``merge``, ``offset``, ``sort_x``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Base Curve
     - base_curve
     - vector
     - —
     - 
     - The primary curve (x/y vector) to which the second curve will be appended; accepts multiple curves when batch-merging.
   * - Second Curve
     - second_curve
     - vector
     - —
     - 
     - The curve whose points are appended to the base curve; its x-values follow those of the base curve in the merged result.
   * - Sort X-Values
     - sort_x
     - scalar
     - no
     - 
     - Whether to sort the merged curve by ascending x-values after concatenation ('yes'/'no'); default 'no' preserves original point order.
   * - Offset Before Merging
     - offset
     - scalar
     - no
     - 
     - Whether to shift the second curve's x-values so they start immediately after the last x-value of the base curve before merging ('yes'/'no'); default 'no' uses raw x-values.
   * - Identical Point Treatment
     - identical_points
     - scalar
     - none
     - 
     - Treatment for duplicate x-values at the merge boundary: 'none' keeps all points, 'retain_first_point' drops the duplicate from the second curve, 'retain_last_point' drops the duplicate from the base curve; default 'none'.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_merge_output_1
     - curves_merge_output_1
     - vector
     - The merged x/y curve containing all points from the base curve followed by those of the second curve, with any requested sorting, offset, and duplicate-point treatment applied.

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

- data.curve.pair
- data.curve.transform

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

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

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_merge</code>. Schema hash: <code>a60e5844398b</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>