.. _method-efficient_global-gaussian_process-surfpack-export_model-filename_prefix:

"""""""""""""""
filename_prefix
"""""""""""""""


User-customizable portion of exported/imported surrogate model
filenames



**Topics**


surrogate_models


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



**Specification**

- *Alias:* None

- *Arguments:* STRING

- *Default:* exported_surrogate


**Description**


Dakota surrogate model files are exported and imported using one file
per response, per requested format. The files are named using the
pattern ``{prefix}``.{response_descriptor}.{extension}. This
``filename_prefix`` keyword is used to supply the prefix portion of the
pattern.

The ``response_descriptor`` portion of the pattern is filled in using
the response :ref:`responses-descriptors<responses-descriptors>` provided by the user (or, if
none are specified, descriptors automatically generated by
Dakota). Extension is a three or four letter string that depends on
the format.



**Examples**


This input snippet directs Dakota to write one algebraic format file
and one binary archive file for each response. The names of the files
will follow the patterns ``my_surrogate``.{response_descriptor}.alg
(for the algebraic files) and
``my_surrogate``.{response_descriptor}.bsps (for the binary files).


.. code-block::

    surrogate global gaussian_process surfpack
      export_model
        filename_prefix = 'my_surrogate'
          formats
            algebraic_file
            binary_archive