.. _auto_curve_yanchorclimborslide:

*COMPUTE THE Y-VALUE AT WHICH THE SLOPE EITHER STARTS TO INCREASE OR DECREASE AFTER A CERTAIN X-VALUE.*
=======================================================================================================

Given a curve and a threshold X-value, finds the Y-value at the point where the curve's slope first begins to climb (increase) or slide (decrease) after that X-value. Use this worker to detect the Y-anchor of a slope-change event — e.g., identifying the onset of yielding or a loading-phase transition — on any 2-D curve.

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

Classification: **process**.

Tagged: ``anchor``, ``climb``, ``curve``, ``inflection``, ``lookup``, ``slide``, ``slope``, ``transition``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve To Be Looked Up
     - curvetobelookedup
     - vector
     - —
     - 
     - The 2-D input curve (X/Y vector) to be analysed; the worker scans this curve beyond the specified X-value to locate the slope-change point.
   * - X Value
     - x_value
     - float
     - —
     - 
     - The X-coordinate threshold (float) beyond which the worker begins searching for a slope climb or slide; leave null to search from the curve's beginning.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_yanchorclimborslide_output_1
     - curve_yanchorclimborslide_output_1
     - scalar
     - The Y-value (scalar) at which the curve's slope first starts to increase or decrease after the given X-value — i.e., the Y-anchor of the detected slope-change event.

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

.. 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_yanchorclimborslide</code>. Schema hash: <code>299126003f0b</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>