.. _auto_curves_offset_to_first:

*COMPUTE OFFSETS FROM THE FIRST CURVE*
======================================

Computes the offset of each curve relative to the first curve in the input set. Given a collection of curves, it subtracts (offsets) the first curve from all subsequent ones, useful for normalizing or comparing multiple time-history or signal curves to a common baseline.

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

Classification: **process**.

Tagged: ``baseline``, ``curves``, ``normalization``, ``offset``, ``offset_to_first``, ``time-history``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curves From Which The Offsets Are To Be Computed
     - curvesfromwhichtheoffsetsaretobecomputed
     - vector
     - —
     - 
     - Ordered collection of two or more curves (vector type, multi-select); the first curve is used as the reference baseline from which all subsequent curves are offset. At least two curves are required for a meaningful result.
   * - Type
     - type
     - scalar
     - y
     - 
     - Axis along which the offset is computed; currently only 'y' is supported (default: 'y'), meaning the Y-values of each curve are shifted relative to the first curve's Y-values.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_offset_to_first_output_1
     - curves_offset_to_first_output_1
     - vector
     - Collection of offset curves (vector type) where each curve represents the difference between the original curve and the first (reference) curve along the selected axis.

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

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_offset_to_first</code>. Schema hash: <code>a8ade2c7eb24</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>