.. _model-adapted_basis-truth_model_pointer:

"""""""""""""""""""
truth_model_pointer
"""""""""""""""""""


Pointer to specify a "truth" model, from which to construct a surrogate



**Topics**


block_pointer


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

   model-adapted_basis-truth_model_pointer-sparse_grid_level
   model-adapted_basis-truth_model_pointer-expansion_order
   model-adapted_basis-truth_model_pointer-dimension
   model-adapted_basis-truth_model_pointer-rotation_method


**Specification**

- *Alias:* actual_model_pointer 

- *Arguments:* STRING


**Child Keywords:**

+-------------------------+--------------------+-----------------------+---------------------------------------------+
| Required/Optional       | Description of     | Dakota Keyword        | Dakota Keyword Description                  |
|                         | Group              |                       |                                             |
+=========================+====================+=======================+=============================================+
| Required (Choose One)   | Expansion Basis    | `sparse_grid_level`__ | Level to use in sparse grid integration or  |
|                         | Control            |                       | interpolation                               |
|                         |                    +-----------------------+---------------------------------------------+
|                         |                    | `expansion_order`__   | The (initial) order of a polynomial         |
|                         |                    |                       | expansion                                   |
+-------------------------+--------------------+-----------------------+---------------------------------------------+
| Optional                                     | `dimension`__         | Prescribe the number of active dimensions   |
+----------------------------------------------+-----------------------+---------------------------------------------+
| Optional                                     | `rotation_method`__   | Method used to build the rotation matrix    |
+----------------------------------------------+-----------------------+---------------------------------------------+

.. __: model-adapted_basis-truth_model_pointer-sparse_grid_level.html
__ model-adapted_basis-truth_model_pointer-expansion_order.html
__ model-adapted_basis-truth_model_pointer-dimension.html
__ model-adapted_basis-truth_model_pointer-rotation_method.html



**Description**


This must point to a model block, identified by :ref:`model-id_model<model-id_model>`.
That model will be run to generate training data, from which a
surrogate model will be constructed.

See :ref:`topic-block_pointer<topic-block_pointer>` for details about pointers.