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

Package org.apache.commons.math.util.OpenIntToDoubleHashMap

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

org.apache.commons.math.util.OpenIntToDoubleHashMap.Iterator


    /** {@inheritDoc} */
    public RealMatrix outerProduct(double[] v) throws IllegalArgumentException {
        checkVectorDimensions(v.length);
        RealMatrix res = new OpenMapRealMatrix(virtualSize, virtualSize);
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            int row = iter.key();
            double value = iter.value();
            for (int col = 0; col < virtualSize; col++) {
                res.setEntry(row, col, value * v[col]);
            }
        }
        return res;

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     * @throws IllegalArgumentException If the dimensions don't match
     */
    public OpenMapRealVector subtract(OpenMapRealVector v) throws IllegalArgumentException{
        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 (isZero(norm)) {
            throw  MathRuntimeException.createArithmeticException("cannot normalize a zero norm vector");
        }
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            entries.put(iter.key(), iter.value() / norm);
        }


    }

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        int result = 1;
        long temp;
        temp = Double.doubleToLongBits(epsilon);
        result = prime * result + (int) (temp ^ (temp >>> 32));
        result = prime * result + virtualSize;
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            temp = Double.doubleToLongBits(iter.value());
            result = prime * result + (int) (temp ^ (temp >>32));
        }
        return result;
    }

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        }
        if (Double.doubleToLongBits(epsilon) !=
            Double.doubleToLongBits(other.epsilon)) {
            return false;
        }
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            double test = other.getEntry(iter.key());
            if (Double.doubleToLongBits(test) != Double.doubleToLongBits(iter.value())) {
                return false;
            }
        }
        iter = other.getEntries().iterator();
        while (iter.hasNext()) {
            iter.advance();
            double test = iter.value();
            if (Double.doubleToLongBits(test) != Double.doubleToLongBits(getEntry(iter.key()))) {
                return false;
            }
        }
        return true;
    }

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     * @throws IllegalArgumentException If the dimensions don't match
     */
    public OpenMapRealVector add(OpenMapRealVector v) throws IllegalArgumentException{
        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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     * @param v vector to append
     * @return The result of appending <code>v</code> 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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    /** {@inheritDoc} */
    public double dotProduct(RealVector v) throws IllegalArgumentException {
        checkVectorDimensions(v.getDimension());
        double res = 0;
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            res += v.getEntry(iter.key()) * iter.value();
        }
        return res;
    }

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    /** {@inheritDoc} */
    public double dotProduct(double[] v) throws IllegalArgumentException {
        checkVectorDimensions(v.length);
        double res = 0;
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            int idx = iter.key();
            double value = 0;
            if (idx < v.length) {
                value = v[idx];
            }
            res += value * iter.value();
        }
        return res;
    }

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    /** {@inheritDoc} */
    public OpenMapRealVector ebeDivide(RealVector v) throws IllegalArgumentException {
        checkVectorDimensions(v.getDimension());
        OpenMapRealVector res = new OpenMapRealVector(this);
        Iterator iter = res.entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            res.setEntry(iter.key(), iter.value() / v.getEntry(iter.key()));
        }
        return res;
    }

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org.apache.commons.math.linear.OpenMapRealVector

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