.. _auto_curves_lookup:

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

Iterates over a collection of curves and extracts a single scalar or label value from each one, returning a dataset of curveName→lookup-value pairs. Use this worker whenever you need to batch-extract a specific statistic (e.g. Ymax, Xfirst, first-peak X) or metadata attribute (e.g. name, id) across an entire curve group.

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

Classification: **process**.

Tagged: ``batch``, ``curve_group``, ``curves``, ``lookup``, ``scalar_extraction``, ``statistics``, ``transformations``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve Group
     - curve_group
     - vector
     - —
     - 
     - The collection of curves to query; accepts one or more curve objects (vector type). If omitted the worker returns an empty dataset.
   * - Type
     - type
     - scalar
     - xfirst
     - 
     - The lookup operation to perform on each curve — e.g. 'ymax' for the maximum Y value, 'xfirst'/'xlast' for boundary X values, 'first_peak_x/y' for the first local peak coordinates, 'intersectx/y' for axis-crossing values, 'num_points' for sample count, 'name'/'id'/'file' for metadata attributes, and statistical tail aggregates such as 'yavg_5p_last', 'yq1', 'yq3', etc. No default — must be explicitly chosen.
   * - With Attr
     - with_attr
     - string
     - name
     - 
     - 

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_lookup_output_1
     - curves_lookup_output_1
     - dataset
     - A two-column dataset (curveName → looked-up value) containing one row per input curve; value type (numeric or string) depends on the selected lookup Type.

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

- data.curve.pair
- data.statistics

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=curves_lookup <https://www.d3view.com/api/workflow/example?id=curves_lookup>`_

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_lookup</code>. Schema hash: <code>4146abed02ef</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>