.. _auto_curves_lookup_scalar:

* THIS FUNCTION LOOKS INTO A COLLECTION OF CURVES AND RETURNS  CURVENAME=>LOOKUP VALUE*
=======================================================================================

Iterates over a collection of curves and extracts a single scalar value from each curve using a specified lookup strategy (e.g., Ymax, Xfirst, first intersection). Use this worker to reduce a curve group into a curveName→scalar mapping for downstream KPI rollup or reporting.

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

Classification: **process**.

Tagged: ``curve_group``, ``intersection``, ``kpi``, ``lookup``, ``reduction``, ``scalar``, ``transformations``, ``xmax``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve Group
     - curve_group
     - vector
     - —
     - 
     - Collection of named curves (CurveGroup) to scan; each curve will be individually evaluated against the chosen lookup type. Optional — if omitted, no output is produced.
   * - Lookup Type
     - lookup_type
     - xfirst
     - xfirst
     - 
     - Scalar extraction method applied to every curve in the group; choose from point-based picks (xfirst, xlast, yfirst, ylast), extrema (xmin, xmax, ymin, ymax, yabsmax, abs_ymax), intersection queries (intersectx, intersecty, first_intersect_x, first_intersect_y, max_value_intersect), aggregates (ysum, num_points, yrange, xrange), or metadata (name, id, file). Defaults to 'xfirst'.
   * - Min Or Max
     - min_or_max
     - string
     - max
     - 
     - Tie-breaking direction used when the lookup produces multiple candidate values (e.g., multiple intersections); select 'max' to return the largest candidate or 'min' to return the smallest. Defaults to 'max'.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_lookup_scalar_output_1
     - curves_lookup_scalar_output_1
     - scalar
     - A scalar value (dimensionless numeric or string, depending on lookup_type) representing the extracted quantity from the curve group — typically the result aggregated across curves according to the min_or_max rule.

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

- cae.postprocessing.response
- 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_lookup_scalar <https://www.d3view.com/api/workflow/example?id=curves_lookup_scalar>`_

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_lookup_scalar</code>. Schema hash: <code>2879cdd81f1b</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
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