[mlpack] 73/149: Add a simple test for DualTreeKMeans.

[Barak A. Pearlmutter]

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bap pushed a commit to branch svn-trunk
in repository mlpack.

commit bade0425981a04556606f66df31d41ea19995d32
Author: rcurtin <rcurtin at 9d5b8971-822b-0410-80eb-d18c1038ef23>
Date:   Wed Nov 5 19:37:27 2014 +0000

    Add a simple test for DualTreeKMeans.
    
    
    git-svn-id: http://svn.cc.gatech.edu/fastlab/mlpack/trunk@17301 9d5b8971-822b-0410-80eb-d18c1038ef23
---
 src/mlpack/tests/kmeans_test.cpp | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/mlpack/tests/kmeans_test.cpp b/src/mlpack/tests/kmeans_test.cpp
index ef8aa2c..a296339 100644
--- a/src/mlpack/tests/kmeans_test.cpp
+++ b/src/mlpack/tests/kmeans_test.cpp
@@ -11,6 +11,7 @@
 #include <mlpack/methods/kmeans/hamerly_kmeans.hpp>
 #include <mlpack/methods/kmeans/pelleg_moore_kmeans.hpp>
 #include <mlpack/methods/kmeans/dtnn_kmeans.hpp>
+#include <mlpack/methods/kmeans/dual_tree_kmeans.hpp>
 
 #include <mlpack/core/tree/cover_tree/cover_tree.hpp>
 
@@ -657,4 +658,36 @@ BOOST_AUTO_TEST_CASE(DTNNCoverTreeTest)
   }
 }
 
+BOOST_AUTO_TEST_CASE(DualTreeKMeansTest)
+{
+  const size_t trials = 5;
+
+  for (size_t t = 0; t < trials; ++t)
+  {
+    arma::mat dataset(10, 1000);
+    dataset.randu();
+
+    const size_t k = 5 * (t + 1);
+    arma::mat centroids(10, k);
+    centroids.randu();
+
+    arma::mat naiveCentroids(centroids);
+    KMeans<> km;
+    arma::Col<size_t> assignments;
+    km.Cluster(dataset, k, assignments, naiveCentroids, false, true);
+
+    KMeans<metric::EuclideanDistance, RandomPartition, MaxVarianceNewCluster,
+        DefaultDualTreeKMeans> dtnn;
+    arma::Col<size_t> dtnnAssignments;
+    arma::mat dtnnCentroids(centroids);
+    dtnn.Cluster(dataset, k, dtnnAssignments, dtnnCentroids, false, true);
+
+    for (size_t i = 0; i < dataset.n_cols; ++i)
+      BOOST_REQUIRE_EQUAL(assignments[i], dtnnAssignments[i]);
+
+    for (size_t i = 0; i < centroids.n_elem; ++i)
+      BOOST_REQUIRE_CLOSE(naiveCentroids[i], dtnnCentroids[i], 1e-5);
+  }
+}
+
 BOOST_AUTO_TEST_SUITE_END();

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