Import Debian changes 0.6.5~20141030-1

elki (0.6.5~20141030-1) unstable; urgency=medium

  * New upstream beta release
  * Urgency medium: 0.6.0 suffers from a performance issue with duplicates.
  * Repackaged tarball from .jar to .tar.bz2
  * Add dependency on libsvm3-java
  * Enable line numbers for debugging (ant debuglevel)

1 files changed, 82 insertions, 0 deletions

diff --git a/src/de/lmu/ifi/dbs/elki/evaluation/classification/holdout/LeaveOneOut.java b/src/de/lmu/ifi/dbs/elki/evaluation/classification/holdout/LeaveOneOut.java
new file mode 100644
index 00000000..1059f0a1
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/evaluation/classification/holdout/LeaveOneOut.java
@@ -0,0 +1,82 @@
+package de.lmu.ifi.dbs.elki.evaluation.classification.holdout;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2014
+ Ludwig-Maximilians-Universität München
+ Lehr- und Forschungseinheit für Datenbanksysteme
+ ELKI Development Team
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import java.util.ArrayList;
+
+import de.lmu.ifi.dbs.elki.datasource.bundle.MultipleObjectsBundle;
+
+/**
+ * A leave-one-out-holdout is to provide a set of partitions of a database where
+ * each instances once hold out as a test instance while the respectively
+ * remaining instances are training instances.
+ * 
+ * @author Arthur Zimek
+ */
+public class LeaveOneOut extends AbstractHoldout {
+  /**
+   * Size of the data set.
+   */
+  private int len, pos;
+
+  /**
+   * Constructor.
+   */
+  public LeaveOneOut() {
+    super();
+  }
+
+  @Override
+  public void initialize(MultipleObjectsBundle bundle) {
+    super.initialize(bundle);
+    len = bundle.dataLength();
+    pos = 0;
+  }
+
+  @Override
+  public int numberOfPartitions() {
+    return len;
+  }
+
+  @Override
+  public TrainingAndTestSet nextPartitioning() {
+    if(pos >= len) {
+      return null;
+    }
+    MultipleObjectsBundle training = new MultipleObjectsBundle();
+    MultipleObjectsBundle test = new MultipleObjectsBundle();
+    // Process column-wise.
+    for(int c = 0, cs = bundle.metaLength(); c < cs; ++c) {
+      ArrayList<Object> tr = new ArrayList<>(len - 1), te = new ArrayList<>(1);
+      for(int i = 0; i < bundle.dataLength(); ++i) {
+        ((i != pos) ? tr : te).add(bundle.data(i, c));
+      }
+      training.appendColumn(bundle.meta(c), tr);
+      test.appendColumn(bundle.meta(c), te);
+    }
+
+    ++pos;
+    return new TrainingAndTestSet(training, test, labels);
+  }
+}
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