.. _auto_curves_match_all:

*COMPUTE THE DIFFERENCE BETWEEN CURVES AND A BASELINE*
======================================================

Computes the pairwise difference (or distance) between every curve in a set and a designated baseline curve using a configurable match metric (raw, absolute, Euclidean, Fréchet, DTW, etc.). Use this worker when you need a quantitative similarity or deviation score for a batch of curves against a single reference.

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

Classification: **process**.

Tagged: ``baseline``, ``batch``, ``curve_match``, ``curves``, ``difference``, ``digitize``, ``distance``, ``dtw``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curves
     - curves
     - vector
     - —
     - 
     - Collection of input curves (vector of curve objects) to be compared against the baseline; supply two or more curves — at least one non-baseline curve is required for a meaningful result.
   * - Baseline Curve Index
     - baseline_curve_index
     - scalar
     - 0
     - 
     - Zero-based integer index into the 'curves' collection that identifies the reference (baseline) curve; defaults to 0 (first curve).
   * - Match Type
     - match_type
     - list
     - raw
     - 
     - Distance/difference metric to apply: 'raw' (signed point-wise diff), 'abs' (absolute diff), 'max' (peak difference), 'max-max-diff' (max-to-max delta), 'euclidean-distance', 'frechet', 'dynamic-time-warping', or 'pdtw'; defaults to 'raw'.
   * - Digitize
     - digitize
     - list
     - 10
     - 
     - Number of evenly-spaced points to re-sample each curve to before matching (0 = no resampling); choose higher values (200–1000) for smoother metrics on dense signals; defaults to 10.
   * - Normalize
     - normalize
     - list
     - no
     - 
     - Whether to normalize each curve to [0, 1] before computing the match metric ('yes' / 'no'); set to 'yes' when curves have different amplitude scales; defaults to 'no'.
   * - Xmin
     - xmin
     - scalar
     - 0
     - 
     - Skip values before this point
   * - Xmax
     - xmax
     - scalar
     - 100000000000000000000
     - 
     - Skip values after this point
   * - Sync
     - sync
     - list
     - yes
     - 
     - 
   * - Enforce Monotonicity
     - skip_drop
     - list
     - no
     - 
     - Options to choose show to clip curves before comparing
   * - Diff Ratio Threshold
     - diff_ratio_threshold
     - scalar
     - 0.1
     - 
     - Only applies if the diff type is ratio based
   * - Remove Outlier Points
     - remove_outliers
     - list
     - no
     - 
     - Remote outliers
   * - Distance Measurement Type
     - distance_measurement_type
     - list
     - euclidean
     - 
     - Only applied for Frechet, DTW, pDTW
   * - Scale By Area Diff
     - scale_by_area_diff
     - select
     - no
     - 
     - The match error is multiplied by integral difference between the two curves
   * - Clip Method
     - clip_method
     - list
     - old
     - 
     - Only DTW, pDTW

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_match_all_output_1
     - curves_match_all_output_1
     - dataset
     - Dataset containing one row per non-baseline curve with the computed match/distance score(s) relative to the baseline curve, along with curve identifiers and the chosen metric name.

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

- data.correlation
- 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_match_all <https://www.d3view.com/api/workflow/example?id=curves_match_all>`_

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_match_all</code>. Schema hash: <code>5d6434f338ff</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
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