.. _auto_curves_sync_last_slope:

*SYNC LAST SLOPES OF ALL CURVES SO THEY ARE EQUAL*
==================================================

Adjusts the trailing slope of all input curves so they share a common last slope, using a configurable sync strategy (max, min, average, respective, or auto). Optionally uses linear regression over a tail percentage of points to estimate the slope more robustly. Use this worker to align diverging curve tails before further processing or comparison.

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

Classification: **process**.

Tagged: ``curves``, ``extrapolation``, ``regression``, ``slope``, ``sync``, ``tail``, ``transformations``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curves In
     - curves_in
     - vector
     - —
     - 
     - Collection of input curves whose last slopes will be synchronized; accepts multiple curve objects (vector type).
   * - Sync Type
     - sync_type
     - scalar
     - max
     - 
     - Strategy used to determine the target common slope: 'max' uses the steepest slope, 'min' the shallowest, 'respective' keeps each curve's own slope, 'curve_average' averages all slopes, and 'auto' selects automatically; defaults to 'max'.
   * - Use Regression
     - use_regression
     - scalar
     - no
     - 
     - Whether to estimate the trailing slope via linear regression ('yes') over a tail fraction of points rather than using the raw last slope ('no'); defaults to 'no'.
   * - Percentage Of Points To Use For Regression
     - reg_per
     - scalar
     - 0.1
     - 
     - Fraction (0–1) of total curve points from the tail end to include in the regression fit when use_regression is 'yes'; e.g. 0.1 uses the last 10% of points; defaults to 0.1.
   * - Maximum X
     - maxx
     - scalar
     - —
     - 
     - Optional maximum X value to which all curves are extrapolated using the common synchronized slope; leave null to skip extrapolation.
   * - Remove Intersection
     - remove_intersection
     - scalar
     - no
     - 
     - Remove intersection after syncing

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_sync_last_slope_output_1
     - curves_sync_last_slope_output_1
     - vector
     - Collection of transformed curves with their trailing slopes synchronized according to the chosen strategy, and optionally extrapolated to the specified maximum X value.

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

- data.curve.pair
- 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_sync_last_slope <https://www.d3view.com/api/workflow/example?id=curves_sync_last_slope>`_

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_sync_last_slope</code>. Schema hash: <code>8319198eb099</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>