.. _auto_curve_enforce_zeroorpositivelastslope:

*COMPUTE THE SLOPE OF THE CURVE AT A GIVEN POINT TO THE ORIGIN IE F(X) / X *
============================================================================

Enforces a zero or positive slope at the last segment of a curve by either adding a corrective point or removing trailing negative-slope entries. Use this worker to ensure that a curve does not end with a downward (negative) slope, which is commonly required for material stress-strain or force-displacement curves in CAE preprocessing.

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

Classification: **process**.

Tagged: ``curve``, ``enforce``, ``force_displacement``, ``last_slope``, ``positive_slope``, ``slope``, ``stress_strain``, ``transformation``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve To Be Enforced Up
     - curvetobeenforcedup
     - vector
     - —
     - 
     - The input XY curve (vector of pairs) whose terminal slope is to be enforced to be zero or positive; typically a stress-strain or force-displacement curve.
   * - Type
     - type
     - string
     - add
     - 
     - Enforcement strategy: 'add' inserts a synthetic point to produce a zero or positive terminal slope, while 'remove' strips trailing data points that carry a negative slope; defaults to 'add'.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_enforce_zeroorpositivelastslope_output_1
     - curve_enforce_zeroorpositivelastslope_output_1
     - vector
     - The corrected XY curve whose last slope is guaranteed to be zero or positive, ready for downstream CAE or material-model use.

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

- cae.preprocessing.setup
- data.curve.transform
- engineering.material.characterization

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

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

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_enforce_zeroorpositivelastslope</code>. Schema hash: <code>6303c9547e8d</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>