.. _auto_curve_integrate_if_negative:

*INTEGRATE NEGATIVE  VALUES ONLY*
=================================

Integrates only the negative portions of a curve, zeroing out any positive values before computing the area under the curve. Use this worker when you need to quantify the cumulative negative contribution of a signal (e.g., rebound energy, negative velocity impulse) independently of its positive regions.

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

Classification: **process**.

Tagged: ``area``, ``curve``, ``integrate``, ``negative``, ``signal``, ``transform``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve
     - curve
     - vector
     - —
     - 
     - Input X-Y curve (vector) whose negative-valued segments will be integrated; positive values are ignored. Leave unconnected only if the worker is used in a chain where the curve is passed implicitly.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_integrate_if_negative_output_1
     - curve_integrate_if_negative_output_1
     - vector
     - Resulting X-Y curve representing the cumulative integral of the negative portions of the input curve; positive regions contribute zero area.

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

- data.curve.transform
- data.signal_processing

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

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

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_integrate_if_negative</code>. Schema hash: <code>45656de89e6b</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>