1 files changed, 18 insertions, 2 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/database/datastore/memory/ArrayDoubleStore.java b/src/de/lmu/ifi/dbs/elki/database/datastore/memory/ArrayDoubleStore.java
index c41991eb..8b2ec127 100644
--- a/src/de/lmu/ifi/dbs/elki/database/datastore/memory/ArrayDoubleStore.java
+++ b/src/de/lmu/ifi/dbs/elki/database/datastore/memory/ArrayDoubleStore.java
@@ -4,7 +4,7 @@ package de.lmu.ifi.dbs.elki.database.datastore.memory;
  This file is part of ELKI:
  Environment for Developing KDD-Applications Supported by Index-Structures
 
- Copyright (C) 2013
+ Copyright (C) 2014
  Ludwig-Maximilians-Universität München
  Lehr- und Forschungseinheit für Datenbanksysteme
  ELKI Development Team
@@ -41,6 +41,11 @@ public class ArrayDoubleStore implements WritableDoubleDataStore {
    * Data array
    */
   private double[] data;
+  
+  /**
+   * Default value.
+   */
+  private double def;
 
   /**
    * DBID to index map
@@ -67,9 +72,10 @@ public class ArrayDoubleStore implements WritableDoubleDataStore {
   public ArrayDoubleStore(int size, DataStoreIDMap idmap, double def) {
     super();
     this.data = new double[size];
-    if (def != 0) {
+    if(def != 0) {
       Arrays.fill(this.data, def);
     }
+    this.def = def;
     this.idmap = idmap;
   }
 
@@ -110,6 +116,16 @@ public class ArrayDoubleStore implements WritableDoubleDataStore {
   }
 
   @Override
+  public void increment(DBIDRef id, double value) {
+    data[idmap.mapDBIDToOffset(id)] += value;
+  }
+
+  @Override
+  public void clear() {
+    Arrays.fill(data, def);
+  }
+
+  @Override
   public void destroy() {
     data = null;
     idmap = null;