Examples of org.apache.commons.math.util.OpenIntToDoubleHashMap

org.apache.commons.math.util.OpenIntToDoubleHashMap
Open addressed map from int to double.
This class provides a dedicated map from integers to doubles with a much smaller memory overhead than standard java.util.Map.

This class is not synchronized. The specialized iterators returned by {@link #iterator()} are fail-fast: they throw aConcurrentModificationException when they detect the map has been modified during iteration.
@version $Revision: 990655 $ $Date: 2010-08-29 23:49:40 +0200 (dim. 29 août 2010) $ @since 2.0

     */
    public double dotProduct(OpenMapRealVector v) throws IllegalArgumentException {
        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;
    }

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Related Classes of org.apache.commons.math.util.OpenIntToDoubleHashMap

org.apache.commons.math.linear.OpenMapRealMatrix

org.apache.commons.math.linear.OpenMapRealVector

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