Examples of org.apache.mahout.math.Vector.minus()

org.apache.mahout.math.Vector.minus()
Return a new matrix containing the element by element difference of the recipient and the argument @param x a Vector @return a new Vector @throws CardinalityException if the cardinalities differ

   *          a Vector of rectangle dimensions
   */
  public static void plotRectangle(Graphics2D g2, Vector v, Vector dv) {
    double[] flip = {1, -1};
    Vector v2 = v.times(new DenseVector(flip));
    v2 = v2.minus(dv.divide(2));
    int h = size / 2;
    double x = v2.get(0) + h;
    double y = v2.get(1) + h;
    g2.draw(new Rectangle2D.Double(x * ds, y * ds, dv.get(0) * ds, dv.get(1) * ds));
  }

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   *          a Vector of ellipse dimensions
   */
  public static void plotEllipse(Graphics2D g2, Vector v, Vector dv) {
    double[] flip = {1, -1};
    Vector v2 = v.times(new DenseVector(flip));
    v2 = v2.minus(dv.divide(2));
    int h = size / 2;
    double x = v2.get(0) + h;
    double y = v2.get(1) + h;
    g2.draw(new Ellipse2D.Double(x * ds, y * ds, dv.get(0) * ds, dv.get(1) * ds));
  }

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    enc.setProbes(2);
    enc.addToVector("123", v2);
    assertEquals(123, v2.maxValue(), 0);
    assertEquals(2 * 123, v2.norm(1), 0);


    v1 = v2.minus(v1);
    assertEquals(123, v1.maxValue(), 0);
    assertEquals(123, v1.norm(1), 0);


    Vector v3 = new DenseVector(20);
    enc.setProbes(2);

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    // this should set the same 6 locations to the same values
    Vector v3 = new DenseVector(200);
    w.addToVector("test1", v3);
    w.addToVector("and", v3);
    w.addToVector("more", v3);
    assertEquals(0, v3.minus(v2).norm(1), 0);


    // moreover, the locations set in the unweighted case should be the same as in the weighted case
    assertEquals(v3.zSum(), v3.dot(v1), 0);
  }

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    // this should set the same 6 locations to the same values
    Vector v3 = new DenseVector(200);
    w.addToVector("test1", v3);
    w.addToVector("and", v3);
    w.addToVector("more", v3);
    assertEquals(0, v3.minus(v2).norm(1), 0);


    // moreover, the locations set in the unweighted case should be the same as in the weighted case
    assertEquals(v3.zSum(), v3.dot(v1), 0);
  }

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   * @param color The color of the rectangle's stroke.
   */
  protected static void plotClusteredRectangle(Graphics2D g2, Vector v, Vector dv, Color color) {
    double[] flip = {1, -1};
    Vector v2 = v.times(new DenseVector(flip));
    v2 = v2.minus(dv.divide(2));
    int h = SIZE / 2;
    double x = v2.get(0) + h;
    double y = v2.get(1) + h;
    
    g2.setStroke(new BasicStroke(1));

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   *          a Vector of rectangle dimensions
   */
  protected static void plotRectangle(Graphics2D g2, Vector v, Vector dv) {
    double[] flip = {1, -1};
    Vector v2 = v.times(new DenseVector(flip));
    v2 = v2.minus(dv.divide(2));
    int h = SIZE / 2;
    double x = v2.get(0) + h;
    double y = v2.get(1) + h;
    g2.draw(new Rectangle2D.Double(x * DS, y * DS, dv.get(0) * DS, dv.get(1) * DS));
  }

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   *          a Vector of ellipse dimensions
   */
  protected static void plotEllipse(Graphics2D g2, Vector v, Vector dv) {
    double[] flip = {1, -1};
    Vector v2 = v.times(new DenseVector(flip));
    v2 = v2.minus(dv.divide(2));
    int h = SIZE / 2;
    double x = v2.get(0) + h;
    double y = v2.get(1) + h;
    g2.draw(new Ellipse2D.Double(x * DS, y * DS, dv.get(0) * DS, dv.get(1) * DS));
  }

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   *          a Vector of rectangle dimensions
   */
  protected static void plotRectangle(Graphics2D g2, Vector v, Vector dv) {
    double[] flip = {1, -1};
    Vector v2 = v.times(new DenseVector(flip));
    v2 = v2.minus(dv.divide(2));
    int h = SIZE / 2;
    double x = v2.get(0) + h;
    double y = v2.get(1) + h;
    g2.draw(new Rectangle2D.Double(x * DS, y * DS, dv.get(0) * DS, dv.get(1) * DS));
  }

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   *          a Vector of ellipse dimensions
   */
  protected static void plotEllipse(Graphics2D g2, Vector v, Vector dv) {
    double[] flip = {1, -1};
    Vector v2 = v.times(new DenseVector(flip));
    v2 = v2.minus(dv.divide(2));
    int h = SIZE / 2;
    double x = v2.get(0) + h;
    double y = v2.get(1) + h;
    g2.draw(new Ellipse2D.Double(x * DS, y * DS, dv.get(0) * DS, dv.get(1) * DS));
  }

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