.. _auto_curves_boundary:

*CREATE A NEW CURVE THAT BOUNDS THE CURVES.*
============================================

Aggregates a collection of curves into a single bounding (or statistical envelope) curve. Supply one or more base curves plus an optional second curve, then choose the aggregation mode — boundary envelope, mean, min, max, mode, or standard deviation. Use this worker when you need to derive a corridor or summary curve from a family of time-history or XY signals.

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

Classification: **process**.

Tagged: ``boundary``, ``corridor``, ``curve_aggregation``, ``envelope``, ``max``, ``mean``, ``min``, ``std``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Base Curve
     - base_curve
     - vector
     - —
     - 
     - One or more primary XY/time-history curves (vector) that form the input population to be aggregated; accepts multiple curves — leave empty only if all curves are supplied via Second Curve.
   * - Second Curve
     - second_curve
     - vector
     - —
     - 
     - An additional curve or set of curves (vector) to be merged with Base Curve before aggregation; optional supplement when the curve population is split across two sources.
   * - Return Type
     - return_type
     - scalar
     - boundary
     - 
     - Aggregation method applied to the curve population: 'boundary' (default) returns a min/max envelope corridor; 'mean', 'min', 'max', 'mode', and 'std' return the corresponding pointwise statistical curve.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_boundary_output_1
     - curves_boundary_output_1
     - vector
     - Resulting aggregated curve (vector) computed from the input population according to the selected Return Type — e.g., a two-sided boundary envelope or a pointwise mean/min/max/std curve.

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

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_boundary</code>. Schema hash: <code>63309a7b3f5f</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>