.. _method-bayes_calibration-queso-emulator-mf_pce-orthogonal_least_interpolation:

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orthogonal_least_interpolation
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Build a polynomial chaos expansion from simulation samples using orthogonal least interpolation.


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

   method-bayes_calibration-queso-emulator-mf_pce-orthogonal_least_interpolation-collocation_points_sequence
   method-bayes_calibration-queso-emulator-mf_pce-orthogonal_least_interpolation-tensor_grid
   method-bayes_calibration-queso-emulator-mf_pce-orthogonal_least_interpolation-reuse_points
   method-bayes_calibration-queso-emulator-mf_pce-orthogonal_least_interpolation-import_build_points_file


**Specification**

- *Alias:* least_interpolation oli 

- *Arguments:* None


**Child Keywords:**

+-------------------------+--------------------+---------------------------------+-----------------------------------------------+
| Required/Optional       | Description of     | Dakota Keyword                  | Dakota Keyword Description                    |
|                         | Group              |                                 |                                               |
+=========================+====================+=================================+===============================================+
| Required                                     | `collocation_points_sequence`__ | Sequence of collocation point counts used in  |
|                                              |                                 | a multi-stage expansion                       |
+----------------------------------------------+---------------------------------+-----------------------------------------------+
| Optional                                     | `tensor_grid`__                 | Use sub-sampled tensor-product quadrature     |
|                                              |                                 | points to build a polynomial chaos expansion. |
+----------------------------------------------+---------------------------------+-----------------------------------------------+
| Optional                                     | `reuse_points`__                | This describes the behavior of reuse of       |
|                                              |                                 | points in constructing polynomial chaos       |
|                                              |                                 | expansion models.                             |
+----------------------------------------------+---------------------------------+-----------------------------------------------+
| Optional                                     | `import_build_points_file`__    | File containing points you wish to use to     |
|                                              |                                 | build a surrogate                             |
+----------------------------------------------+---------------------------------+-----------------------------------------------+

.. __: method-bayes_calibration-queso-emulator-mf_pce-orthogonal_least_interpolation-collocation_points_sequence.html
__ method-bayes_calibration-queso-emulator-mf_pce-orthogonal_least_interpolation-tensor_grid.html
__ method-bayes_calibration-queso-emulator-mf_pce-orthogonal_least_interpolation-reuse_points.html
__ method-bayes_calibration-queso-emulator-mf_pce-orthogonal_least_interpolation-import_build_points_file.html



**Description**


Build a polynomial chaos expansion from simulation samples using orthogonal least interpolation. Unlike the other regression methods ``expansion_order`` cannot be set. OLI will produce the lowest degree polynomial that interpolates the data


