.. _auto_curves_subtract:

*COMPUTE THE DIFFERENCE OF TWO CURVES BY SUBTRACTING THE Y-VALUES*
==================================================================

Subtracts the y-values of a second curve from a first curve element-wise, producing a new difference curve on the same x-axis. Use this worker whenever you need to compute the point-wise difference between two time-history or XY curves.

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

Classification: **process**.

Tagged: ``curve_math``, ``difference``, ``element-wise``, ``subtract``, ``transformations``, ``y-values``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve From Which The Values Are To Be Subtracted
     - curvefromwhichthevaluesaretobesubtracted
     - vector
     - —
     - 
     - The minuend curve (XY/time-history vector) whose y-values will be reduced; accepts multiple curves when batch subtraction is needed — leave empty only if no base curve is available.
   * - Curve Whose Values Will Be Used To Subrtract
     - curvewhosevalueswillbeusedtosubrtract
     - vector
     - —
     - 
     - The subtrahend curve (XY/time-history vector) whose y-values are subtracted from the first curve; must share the same x-axis domain as the minuend curve.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_subtract_output_1
     - curves_subtract_output_1
     - vector
     - Resulting difference curve (vector) containing the element-wise y-values of curve 1 minus curve 2, preserving the original x-axis of the minuend.

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

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_subtract</code>. Schema hash: <code>2fc439ce0264</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>