<p>This is in no way ready to merge, but I've done a bit of progress on the LSH tuning class, so I'm opening a PR to track how things are going.</p>

<p>With regards to implementation (in order for the algorithm to be complete), I need to</p>

<ul>
<li>Write the code that fits Gamma distributions to distances.</li>
<li>Define the objective functions used for integration to calculate recall and precision.</li>
<li>Write the code that integrates the objective functions.</li>
<li>Implement the binary search that identifies useful parameter sets.</li>
</ul>

<p>With regards to functionality (in order for this to be usable), I also need to</p>

<ul>
<li>Identify any hard-coded things that should become input parameters.</li>
<li>Handle input and output.</li>
<li>Write meaningful tests.</li>
</ul>

<p>Then finally there's the step of profiling &amp; optimization of the code.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>&nbsp;&nbsp;<a href='https://github.com/mlpack/mlpack/pull/749'>https://github.com/mlpack/mlpack/pull/749</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>Skeleton of Project</li>
  <li>Almost complete LSHModel skeleton</li>
  <li>Implements modeling of arithmetic and geometric mean of distances</li>
  <li>Merge latest upstream commits into lsh-tuning</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/mlpack/mlpack/pull/749/files#diff-0">src/mlpack/methods/CMakeLists.txt</a>
    (1)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/mlpack/mlpack/pull/749/files#diff-1">src/mlpack/methods/lsh/lsh_search.hpp</a>
    (1)
  </li>
  <li>
    <strong>A</strong>
    <a href="https://github.com/mlpack/mlpack/pull/749/files#diff-2">src/mlpack/methods/lsh_model/CMakeLists.txt</a>
    (19)
  </li>
  <li>
    <strong>A</strong>
    <a href="https://github.com/mlpack/mlpack/pull/749/files#diff-3">src/mlpack/methods/lsh_model/lshmodel.hpp</a>
    (305)
  </li>
  <li>
    <strong>A</strong>
    <a href="https://github.com/mlpack/mlpack/pull/749/files#diff-4">src/mlpack/methods/lsh_model/lshmodel_impl.hpp</a>
    (249)
  </li>
  <li>
    <strong>A</strong>
    <a href="https://github.com/mlpack/mlpack/pull/749/files#diff-5">src/mlpack/methods/lsh_model/lshmodel_main.cpp</a>
    (25)
  </li>
  <li>
    <strong>A</strong>
    <a href="https://github.com/mlpack/mlpack/pull/749/files#diff-6">src/mlpack/methods/lsh_model/objectivefunction.hpp</a>
    (171)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/mlpack/mlpack/pull/749.patch'>https://github.com/mlpack/mlpack/pull/749.patch</a></li>
  <li><a href='https://github.com/mlpack/mlpack/pull/749.diff'>https://github.com/mlpack/mlpack/pull/749.diff</a></li>
</ul>

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