Examples of org.apache.commons.math3.util.OpenIntToDoubleHashMap.Iterator

Package org.apache.commons.math3.util.OpenIntToDoubleHashMap

Examples of org.apache.commons.math3.util.OpenIntToDoubleHashMap.Iterator

org.apache.commons.math3.util.OpenIntToDoubleHashMap.Iterator
Weight matrix of the residuals between model and observations.
Immutable class. @version $Id: Weight.java 1416643 2012-12-03 19:37:14Z tn $ @since 3.1

     * @return the distance from {@code this} and {@code v}.
     * @throws org.apache.commons.math3.exception.DimensionMismatchException
     * if the dimensions do not match.
     */
    public double getDistance(OpenMapRealVector v) {
        Iterator iter = entries.iterator();
        double res = 0;
        while (iter.hasNext()) {
            iter.advance();
            int key = iter.key();
            double delta;
            delta = iter.value() - v.getEntry(key);
            res += delta * delta;
        }
        iter = v.getEntries().iterator();
        while (iter.hasNext()) {
            iter.advance();
            int key = iter.key();
            if (!entries.containsKey(key)) {
                final double value = iter.value();
                res += value * value;
            }
        }
        return FastMath.sqrt(res);
    }

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     * @param v Vector to which distance is requested.
     * @return distance between this vector and {@code v}.
     */
    public double getL1Distance(OpenMapRealVector v) {
        double max = 0;
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            double delta = FastMath.abs(iter.value() - v.getEntry(iter.key()));
            max += delta;
        }
        iter = v.getEntries().iterator();
        while (iter.hasNext()) {
            iter.advance();
            int key = iter.key();
            if (!entries.containsKey(key)) {
                double delta = FastMath.abs(iter.value());
                max +=  FastMath.abs(delta);
            }
        }
        return max;
    }

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     * @param v Vector to compute distance from.
     * @return the LInfDistance.
     */
    private double getLInfDistance(OpenMapRealVector v) {
        double max = 0;
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            double delta = FastMath.abs(iter.value() - v.getEntry(iter.key()));
            if (delta > max) {
                max = delta;
            }
        }
        iter = v.getEntries().iterator();
        while (iter.hasNext()) {
            iter.advance();
            int key = iter.key();
            if (!entries.containsKey(key)) {
                if (iter.value() > max) {
                    max = iter.value();
                }
            }
        }
        return max;
    }

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    /** {@inheritDoc} */
    @Override
    public boolean isInfinite() {
        boolean infiniteFound = false;
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            final double value = iter.value();
            if (Double.isNaN(value)) {
                return false;
            }
            if (Double.isInfinite(value)) {
                infiniteFound = true;

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    }


    /** {@inheritDoc} */
    @Override
    public boolean isNaN() {
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            if (Double.isNaN(iter.value())) {
                return true;
            }
        }
        return false;
    }

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     * if the dimensions do not match.
     */
    public OpenMapRealVector subtract(OpenMapRealVector v) {
        checkVectorDimensions(v.getDimension());
        OpenMapRealVector res = copy();
        Iterator iter = v.getEntries().iterator();
        while (iter.hasNext()) {
            iter.advance();
            int key = iter.key();
            if (entries.containsKey(key)) {
                res.setEntry(key, entries.get(key) - iter.value());
            } else {
                res.setEntry(key, -iter.value());
            }
        }
        return res;
    }

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    public void unitize() {
        double norm = getNorm();
        if (isDefaultValue(norm)) {
            throw new MathArithmeticException(LocalizedFormats.ZERO_NORM);
        }
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            entries.put(iter.key(), iter.value() / norm);
        }
    }

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    /** {@inheritDoc} */
    @Override
    public double[] toArray() {
        double[] res = new double[virtualSize];
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            res[iter.key()] = iter.value();
        }
        return res;
    }

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    public OpenMapRealVector add(OpenMapRealVector v)
        throws DimensionMismatchException {
        checkVectorDimensions(v.getDimension());
        boolean copyThis = entries.size() > v.entries.size();
        OpenMapRealVector res = copyThis ? this.copy() : v.copy();
        Iterator iter = copyThis ? v.entries.iterator() : entries.iterator();
        OpenIntToDoubleHashMap randomAccess = copyThis ? entries : v.entries;
        while (iter.hasNext()) {
            iter.advance();
            int key = iter.key();
            if (randomAccess.containsKey(key)) {
                res.setEntry(key, randomAccess.get(key) + iter.value());
            } else {
                res.setEntry(key, iter.value());
            }
        }
        return res;
    }

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     * @param v vector to append
     * @return The result of appending {@code v} to self
     */
    public OpenMapRealVector append(OpenMapRealVector v) {
        OpenMapRealVector res = new OpenMapRealVector(this, v.getDimension());
        Iterator iter = v.entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            res.setEntry(iter.key() + virtualSize, iter.value());
        }
        return res;
    }

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