.. _auto_curves_positive_to_zero:

*SET ALL POSITIVE VALUES TO ZERO*
=================================

Clamps all positive Y-values in one or more curves to zero, leaving negative and zero values unchanged. Use this transformation to suppress positive excursions and retain only the compressive or negative portion of a signal.

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

Classification: **process**.

Tagged: ``clamp``, ``curve``, ``positive_to_zero``, ``signal``, ``transformation``, ``zero_floor``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curves
     - curves
     - vector
     - —
     - 
     - One or more input curves whose positive Y-values will be set to zero; accepts a single curve or a multi-curve vector — leave empty only if a base curve is supplied upstream in the workflow.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_positive_to_zero_output_1
     - curves_positive_to_zero_output_1
     - vector
     - Transformed curve(s) with all positive Y-values replaced by zero; shape and X-axis are identical to the input.

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

.. 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_positive_to_zero</code>. Schema hash: <code>089cb28bb220</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>