<p>Hi there,</p>

<p>This is because the mlpack code style uses capitalized function names.  So we built an adapter to use boost::serialization but at this time there is not one for cereal.  You could use it like this...</p>

<pre><code>boost::archive::xml_oarchive oa(...);
mlpack::gmm::GMM&lt;&gt; gmm(...);
oa &lt;&lt; mlpack::data::CreateNVP(gmm, "gmm");
</code></pre>

<p>So, basically, use <code>mlpack::data::CreateNVP()</code> to pass to <code>boost::serialization</code> (and maybe cereal?  I don't know if that will work) instead of passing the object directly.</p>

<p>If you are interested in the way this works, take a look at <code>src/mlpack/core/data/serialization_shim.hpp</code>, but be warned, that is probably the most complex C++ in the whole library.</p>

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