.. _auto_curve_drop_if_negative:

*DROP NEGATIVE VALUES*
======================

Filters a curve by removing all data points where the Y-value is negative, returning only non-negative portions of the curve. Use this worker to clean up curves that should be physically non-negative (e.g., force, energy) before further processing.

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

Classification: **process**.

Tagged: ``"``, ``a``, ``c``, ``d``, ``e``, ``f``, ``g``, ``i``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve
     - curve
     - vector
     - —
     - 
     - Input curve (X/Y vector pair) whose negative Y-values are to be removed; leave unconnected if no curve is available yet — the worker will return an empty result.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_drop_if_negative_output_1
     - curve_drop_if_negative_output_1
     - vector
     - Filtered curve containing only the data points from the input curve where the Y-value is greater than or equal to zero.

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

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_drop_if_negative</code>. Schema hash: <code>fac3b96afece</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>