.. _method-bayes_calibration-gpmsa-proposal_covariance-values-matrix:

""""""
matrix
""""""


Specifies the full matrix format when specifying a
user-specified proposal covariance.


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



**Specification**

- *Alias:* None

- *Arguments:* None


**Description**


When specifying the MCMC proposal covariance in an input file, this
keyword declares the use of a full matrix format, i.e., the user
provides all values of the matrix, not just the diagonal.  The matrix
must be symmetric, positive-definite.



**Examples**



.. code-block::

    method,
            bayes_calibration queso
             samples = 1000 seed = 348
              dram
              proposal_covariance
                matrix values 1.0 0.1
                              0.1 2.0