.. _auto_curve_to_log:

*CONVERT VALUES OF X OR Y TO LOG SCALE*
=======================================

Applies a base-10 logarithm transformation to the X, Y, or both axes of a curve. Use this worker when you need to convert linear-scale curve data to log scale for visualisation, frequency analysis, or downstream log-space processing.

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

Classification: **process**.

Tagged: ``axis_transform``, ``curve_transform``, ``log10``, ``log_scale``, ``x_axis``, ``y_axis``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Base Curve
     - base_curve
     - vector
     - —
     - 
     - Input curve (X/Y vector pair) whose axis values will be log-transformed; must contain strictly positive values on the axis being transformed.
   * - Axis
     - axis
     - string
     - x
     - 
     - Axis to apply the log transformation to: 'x' (X-axis only, default), 'y' (Y-axis only), or 'xy' (both axes simultaneously).

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_to_Log_output_1
     - curve_to_log_output_1
     - vector
     - Output curve with the selected axis values replaced by their base-10 logarithm, preserving the original axis that was not transformed.

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

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

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_to_log</code>. Schema hash: <code>9a28c73537bc</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>