.. highlightlang:: us

.. index:: atanh

.. _atanh:

atanh
=====

.. us.tag  atanh ENGLISH math-trigo

:ref:`atanh` calculates the hyperbolic arctangent.

.. function::  r = atanh(m)

.. us.return

**Return Value**

*r* is the hyperbolic arctangent of *m*.

.. us.params

**Parameters**

.. uparam:: m

   *m* is a real or complex matrix.

.. us.comment

**Comment**

Algorithm: ``0.5 .* log ((1 + x) ./ (1 - x))``.

.. seealso::
   :ref:`overview-mathematic`,
   :ref:`tanh`

:sub:`id-338426`