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From celes...@apache.org
Subject svn commit: r1360662 - in /commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear: ArrayRealVector.java OpenMapRealVector.java RealVector.java
Date Thu, 12 Jul 2012 13:17:09 GMT
Author: celestin
Date: Thu Jul 12 13:17:08 2012
New Revision: 1360662

URL: http://svn.apache.org/viewvc?rev=1360662&view=rev
Log:
MATH-812: fixed a bug in RealVector.dotProduct(RealVector).

Modified:
    commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/ArrayRealVector.java
    commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/OpenMapRealVector.java
    commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/RealVector.java

Modified: commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/ArrayRealVector.java
URL: http://svn.apache.org/viewvc/commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/ArrayRealVector.java?rev=1360662&r1=1360661&r2=1360662&view=diff
==============================================================================
--- commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/ArrayRealVector.java
(original)
+++ commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/ArrayRealVector.java
Thu Jul 12 13:17:08 2012
@@ -455,16 +455,8 @@ public class ArrayRealVector extends Rea
                 dot += data[i] * vData[i];
             }
             return dot;
-        } else {
-            checkVectorDimensions(v);
-            double dot = 0;
-            Iterator<Entry> it = v.sparseIterator();
-            while (it.hasNext()) {
-                final Entry e = it.next();
-                dot += data[e.getIndex()] * e.getValue();
-            }
-            return dot;
         }
+        return super.dotProduct(v);
     }
 
     /** {@inheritDoc} */

Modified: commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/OpenMapRealVector.java
URL: http://svn.apache.org/viewvc/commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/OpenMapRealVector.java?rev=1360662&r1=1360661&r2=1360662&view=diff
==============================================================================
--- commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/OpenMapRealVector.java
(original)
+++ commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/OpenMapRealVector.java
Thu Jul 12 13:17:08 2012
@@ -304,38 +304,6 @@ public class OpenMapRealVector extends S
         return new OpenMapRealVector(this);
     }
 
-    /**
-     * Optimized method to compute the dot product with an OpenMapRealVector.
-     * It iterates over the smallest of the two.
-     *
-     * @param v Cector to compute the dot product with.
-     * @return the dot product of {@code this} and {@code v}.
-     * @throws org.apache.commons.math3.exception.DimensionMismatchException
-     * if the dimensions do not match.
-     */
-    public double dotProduct(OpenMapRealVector v) {
-        checkVectorDimensions(v.getDimension());
-        boolean thisIsSmaller  = entries.size() < v.entries.size();
-        Iterator iter = thisIsSmaller  ? entries.iterator() : v.entries.iterator();
-        OpenIntToDoubleHashMap larger = thisIsSmaller  ? v.entries : entries;
-        double d = 0;
-        while(iter.hasNext()) {
-            iter.advance();
-            d += iter.value() * larger.get(iter.key());
-        }
-        return d;
-    }
-
-    /** {@inheritDoc} */
-    @Override
-    public double dotProduct(RealVector v) {
-        if(v instanceof OpenMapRealVector) {
-            return dotProduct((OpenMapRealVector)v);
-        } else {
-            return super.dotProduct(v);
-        }
-    }
-
     /** {@inheritDoc} */
     @Override
     public OpenMapRealVector ebeDivide(RealVector v) {

Modified: commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/RealVector.java
URL: http://svn.apache.org/viewvc/commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/RealVector.java?rev=1360662&r1=1360661&r2=1360662&view=diff
==============================================================================
--- commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/RealVector.java
(original)
+++ commons/proper/math/trunk/src/main/java/org/apache/commons/math3/linear/RealVector.java
Thu Jul 12 13:17:08 2012
@@ -303,10 +303,9 @@ public abstract class RealVector {
     public double dotProduct(RealVector v) {
         checkVectorDimensions(v);
         double d = 0;
-        Iterator<Entry> it = sparseIterator();
-        while (it.hasNext()) {
-            final Entry e = it.next();
-            d += e.getValue() * v.getEntry(e.getIndex());
+        final int n = getDimension();
+        for (int i = 0; i < n; i++) {
+            d += getEntry(i) * v.getEntry(i);
         }
         return d;
     }



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