Blurb::
Specifies the diagonal matrix format when importing a
user-specified proposal covariance.
Description::
When importing the MCMC proposal covariance from a user-specified
filename, this keyword declares the use of a diagonal matrix format,
i.e., the user only provides the (positive) values along the diagonal.
Topics::

Examples::

.. code-block::

    method,
            bayes_calibration queso
             samples = 1000 seed = 348
              dram
              proposal_covariance
                diagonal filename 'dakota_cantilever_queso.diag.dat'


Theory::

Faq::

See_Also::
