.. _auto_math_log:

*COMPUTE THE NATURAL LOG OF A NUMBER*
=====================================

Computes the natural logarithm (base e) of a given scalar number. Use this worker anywhere a ln(x) transformation is needed in a data pipeline or mathematical expression.

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

Classification: **process**.

Tagged: ``ln``, ``log``, ``math``, ``natural_log``, ``scalar``, ``transformation``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Number
     - numberwhosenaturallogistobecomputed
     - scalar
     - —
     - ✓
     - The scalar numeric value x for which ln(x) is computed; must be a positive real number (x > 0).
   * - Format
     - format
     - text
     - %s
     - ✓
     - Optional printf-style format string (e.g. '%.4f') used to format the output; defaults to '%s' which returns the full floating-point string representation.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - math_log_output_1
     - math_log_output_1
     - scalar
     - Scalar result of ln(x), formatted according to the 'format' input; a floating-point number returned as a string.

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=math_log <https://www.d3view.com/api/workflow/example?id=math_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>math_log</code>. Schema hash: <code>c9689b5da3da</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>