[mlpack-git] Broken: mlpack/mlpack#463 (master - c505098)

[Travis CI]

Build Update for mlpack/mlpack
-------------------------------------

Build: #463
Status: Broken

Duration: 23 minutes and 4 seconds
Commit: c505098 (master)
Author: Ryan Curtin
Message: Force a minimum value on the diagonal.

This is necessary so that the inverse covariance doesn't explode.  If the
covariance is sufficiently small, then the PDF of the Gaussian will condense
towards a delta function, and you will end up with inf's in your probabilities,
which turn into NaNs when normalized, and then your entire model turns into
NaNs.

Note that the PositiveDefinite constraint can be replaced with the NoConstraint
class for speed if necessary.

View the changeset: https://github.com/mlpack/mlpack/compare/805789a9b4dc...c5050982ef63

View the full build log and details: https://travis-ci.org/mlpack/mlpack/builds/102183268

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