.. highlightlang:: us

.. index:: erf

.. _erf:

erf
===

.. us.tag erf NOTREADYENGLISH math-spec-fun New5502

:ref:`erf` calculates the error function:
:math:`\operatorname{erf}(x) = \frac{2}{\sqrt{\pi}}\int_{0}^x e^{-t^2}\,\mathrm dt`.

.. function:: y = erf(x)

.. us.return

**Return Value**

*y* is erf(x).

.. us.params

**Parameters**

.. uparam:: x

   *x* is a real vector.

.. us.example

**Example**

::

   x = [-5:0.1:5];
   y = erf(x);
   plot(x, y);

.. us.history

**History**

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

   * - Version
     - Description
   * - R2013.2
     - Documented.
   * - 5.50.2
     - New.

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

:sub:`id-102502`