.. _method-coliny_ea-mutation_type-offset_normal:

"""""""""""""
offset_normal
"""""""""""""


Set mutation offset to use a normal distribution


.. toctree::
   :hidden:
   :maxdepth: 1

   method-coliny_ea-mutation_type-offset_normal-mutation_scale
   method-coliny_ea-mutation_type-offset_normal-mutation_range


**Specification**

- *Alias:* None

- *Arguments:* None


**Child Keywords:**

+-------------------------+--------------------+--------------------+-----------------------------------------------+
| Required/Optional       | Description of     | Dakota Keyword     | Dakota Keyword Description                    |
|                         | Group              |                    |                                               |
+=========================+====================+====================+===============================================+
| Optional                                     | `mutation_scale`__ | Scales mutation across range of parameter     |
+----------------------------------------------+--------------------+-----------------------------------------------+
| Optional                                     | `mutation_range`__ | Set uniform offset control for discrete       |
|                                              |                    | parameters                                    |
+----------------------------------------------+--------------------+-----------------------------------------------+

.. __: method-coliny_ea-mutation_type-offset_normal-mutation_scale.html
__ method-coliny_ea-mutation_type-offset_normal-mutation_range.html



**Description**


The ``offset_normal`` type is an "offset" mutation that adds a 0-mean random
variable with a normal uniform distribution to the existing coordinate value.
The offset is limited in magnitude by ``mutation_scale``.


