.. _auto_curve_get_failed_points:

*LOOK UP Y VALUES AND REPORT FAILED POINTS BASED ON THRESHOLDS*
===============================================================

Scans a curve's y-values within an optional x-range and identifies points that fall outside a threshold band (threshold_value ± threshold_value × threshold_tolerance). Returns a scalar summary of the failed points as a percentage, raw count, or average y-value, depending on the selected return type.

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

Classification: **process**.

Tagged: ``curve``, ``failed_points``, ``pass_fail``, ``quality_check``, ``scalar_output``, ``threshold``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve
     - curve
     - vector
     - —
     - ✓
     - Input curve (x/y vector) whose y-values will be evaluated against the threshold; must be a valid d3VIEW curve object.
   * - X Min
     - x_min
     - float
     - 0.0
     - 
     - Lower bound of the x-range to inspect; data points with x-values below this threshold are skipped (default 0.0, same units as the curve's x-axis).
   * - X Max
     - x_max
     - float
     - 0.0
     - 
     - Upper bound of the x-range to inspect; data points with x-values above this value are skipped (default 0.0, same units as the curve's x-axis; set equal to x_min to disable upper filtering).
   * - X Max
     - threshold_value
     - float
     - 0.0
     - 
     - Central reference value against which curve y-values are compared; a point is considered failed if its y-value falls outside ±threshold_tolerance × threshold_value (default 0.0, same units as the curve's y-axis).
   * - X Max
     - threshold_tolerance
     - float
     - 0.01
     - 
     - Fractional tolerance multiplied by threshold_value to form the acceptable band (e.g., 0.01 = ±1%); default is 0.01.
   * - Slope Type
     - return_type
     - string
     - first
     - 
     - Selects the scalar summary returned: 'percentage_failed' (fraction of points outside the band as %), 'num_failed' (integer count of failed points), or 'yavg_failed' (mean y-value of failed points); default is 'first' (percentage_failed).

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_get_failed_points_output_1
     - curve_get_failed_points_output_1
     - scalar
     - Scalar result summarising the failed points in the specified x-range: either the percentage failed, the count of failed points, or the average y-value of failed points, as determined by return_type.

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

- data.curve.transform
- data.statistics

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

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

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_get_failed_points</code>. Schema hash: <code>2c2d5ef1c411</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
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