.. _auto_curves_add_difference:

*COMPUTE THE Y-DIFFERENCE COMPARED TO THE PREVIOUS POINT*
=========================================================

Computes the y-difference between each point and its immediately preceding point for one or more input curves, appending the delta as a new curve. Use this worker when you need a discrete first-difference (delta-y) representation of a signal along its x-axis.

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

Classification: **process**.

Tagged: ``curve-transform``, ``delta``, ``difference``, ``first-difference``, ``point-wise``, ``y-diff``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve In
     - curves
     - vector
     - —
     - 
     - One or more input curves (x/y vector pairs) for which the y-difference relative to the previous point will be computed; accepts multiple curves in batch.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_add_output_1
     - curve_add_output_1
     - vector
     - Output curve(s) containing the point-wise y-difference values (y[i] − y[i−1]) at each x position; the first point is typically zero or dropped depending on implementation.

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

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

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_add_difference</code>. Schema hash: <code>7b690996efd2</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>