.. _auto_curve_monotonic:

*ENFORCES MONOTONICITY FOR X OR Y POINTS*
=========================================

Enforces monotonicity on a curve's X or Y axis by removing non-monotonic points according to the chosen axis mode and direction. Use this worker to clean up curves with oscillations or back-tracking before further processing or material calibration workflows.

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

Classification: **process**.

Tagged: ``cleanup``, ``curve``, ``curve_transform``, ``monotonic``, ``monotonicity``, ``oscillation``, ``x-axis``, ``y-axis``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve To Be Operated On
     - curvetobeoperatedon
     - vector
     - —
     - 
     - The input curve (X/Y vector pair) whose monotonicity will be enforced; must be supplied as a two-column vector — leave unconnected only if the curve is piped implicitly by the parent workflow.
   * - Axis And Starting Point
     - axis
     - string
     - x
     - 
     - Axis and traversal strategy for monotonicity enforcement: 'x' / 'y' / 'xy' start from the first point and enforce increasing monotonicity; 'x1' removes horizontal oscillations; 'x_end' / 'y_end' start from the last point; 'yslope', 'yslopeclip', and 'yslopeconstant' enforce slope-based monotonicity with different clipping behaviours; defaults to 'x'.
   * - Min X
     - xmin
     - scalar
     - -1e20
     - 
     - Minimum X value below which curve points are ignored before the monotonicity filter is applied; dimensionless scalar matching the curve's X units — leave at default (-1e20) to include all points.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_monotonic_output_1
     - curve_monotonic_output_1
     - vector
     - The monotonicity-enforced output curve (X/Y vector pair) with non-monotonic points removed or adjusted according to the selected axis mode and direction.

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

.. 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_monotonic</code>. Schema hash: <code>3ceeeb2f94f9</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>