.. _auto_curve_extrapolate_constant:

*EXTRAPOLATE THE CURVE WITH A CONSTANT VALUE*
=============================================

Extends a curve beyond its current end-point by appending a constant (flat) segment up to a specified last X-value at a specified last Y-value. Use this worker when a curve must be padded to a longer domain with no change in magnitude beyond the original data range.

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

Classification: **process**.

Tagged: ``constant``, ``curve``, ``extend``, ``extrapolate``, ``flat``, ``pad``.

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) to be extrapolated; connect the upstream curve output here.
   * - Last X-Value
     - x_last
     - scalar
     - 1
     - 
     - X-coordinate of the final extrapolated point; defines how far along the X-axis the constant segment extends (default: 1).
   * - Last Y-Value
     - y_last
     - scalar
     - 1
     - 
     - Constant Y-value applied across the extrapolated segment from the curve's last point to x_last (default: 1).

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_extrapolate_constant_output_1
     - curve_extrapolate_constant_output_1
     - vector
     - Extrapolated curve (X/Y vector pair) identical to the input curve up to its original end-point, then extended as a flat constant segment through (x_last, y_last).

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

.. 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_extrapolate_constant</code>. Schema hash: <code>263a02e4ac2c</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>