.. _auto_curves_lookup_xvalueat_from_dataset:

*LOOKUP X-VALUE FROM A GIVEN Y-VALUE*
=====================================

Looks up the x-value on one or more curves that corresponds to a given y-value supplied from a dataset column. Use this worker when you need to find the x-axis position (e.g. time, displacement) at a specific response threshold defined in a tabular dataset.

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

Classification: **process**.

Tagged: ``curve``, ``curve_group``, ``dataset``, ``interpolation``, ``lookup``, ``x-value``, ``y-value``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curves To Be Looked Up
     - curvestobelookedup
     - vector
     - —
     - ✓
     - One or more curves (vector type, multi-select) from which the x-value will be looked up; each curve is searched for the y-value(s) provided by the dataset column.
   * - Dataset
     - dataset
     - dataset
     - —
     - ✓
     - Tabular dataset whose rows supply the target y-values used for the lookup; must contain at least the column specified in the 'col' input.
   * - Column With Y-Values
     - col
     - text
     - —
     - ✓
     - Name of the dataset column that holds the y-values at which the corresponding x-values should be found; select from the columns present in the connected dataset.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_lookup_yvalueat_output_1
     - curves_lookup_yvalueat_output_1
     - dataset
     - Dataset containing the looked-up x-values for each input curve and each target y-value row from the dataset column.

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

- data.curve.pair
- data.curve.transform
- data.dataset.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_xvalueat_from_dataset <https://www.d3view.com/api/workflow/example?id=curves_lookup_xvalueat_from_dataset>`_

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_lookup_xvalueat_from_dataset</code>. Schema hash: <code>f7c9d9844b04</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>