How to use

pow

method

in

javolution.lang.MathLib

/**
 * Returns this number raised to the specified power.
 *
 * @param  e the exponent.
 * @return <code>this**e</code>.
 */
public Float64 pow(double e) {
  Float64 r = FACTORY.object();
  r._value = MathLib.pow(this._value, e);
  return r;
}

/**
 * Returns this number raised to the power of the specified exponent.
 *
 * @param  that the exponent.
 * @return <code>this**that</code>.
 */
public Float64 pow(Float64 that) {
  Float64 r = FACTORY.object();
  r._value = MathLib.pow(this._value, that._value);
  return r;
}

/**
 * Returns the value of the first argument raised to the power of the
 * second argument. 
 *
 * @param x the base.
 * @param y the exponent.
 * @return <code>x<sup>y</sup></code>
 **/
public static double pow(double x, double y) {
  // Use close approximation (+/- LSB)
  if ((x < 0) && (y == (int) y))
    return (((int) y) & 1) == 0 ? pow(-x, y) : -pow(-x, y);
  return MathLib.exp(y * MathLib.log(x));
}

/**
 * Returns the value of the first argument raised to the power of the
 * second argument. 
 *
 * @param x the base.
 * @param y the exponent.
 * @return <code>x<sup>y</sup></code>
 **/
public static double pow(double x, double y) {
  // Use close approximation (+/- LSB)
  if ((x < 0) && (y == (int) y))
    return (((int) y) & 1) == 0 ? pow(-x, y) : -pow(-x, y);
  return MathLib.exp(y * MathLib.log(x));
}

/**
 * Returns the value of the first argument raised to the power of the
 * second argument. 
 *
 * @param x the base.
 * @param y the exponent.
 * @return <code>x<sup>y</sup></code>
 **/
public static double pow(double x, double y) {
  // Use close approximation (+/- LSB)
  if ((x < 0) && (y == (int) y))
    return (((int) y) & 1) == 0 ? pow(-x, y) : -pow(-x, y);
  return MathLib.exp(y * MathLib.log(x));
}

/**
 * Returns the root mean square value of the given inputs over the given
 * range.
 * 
 * @param lowerFreqHz
 *          >= 1
 * @param upperFreqHz
 *          < {@link #getUpperMeasurableFrequency()}
 * @param fftd
 *          powers
 * 
 * @return the rms value
 */
public double rms(int lowerFreqHz, int upperFreqHz, double... fftd) {
  assert fftd != null && fftd.length > 0;
  assert lowerFreqHz >= 1 && lowerFreqHz < upperFreqHz && upperFreqHz < getUpperMeasurableFrequency();
  int divisor = fftd.length;
  double sum = 0;
  for (int i = lowerFreqHz; i <= upperFreqHz; i++) {
    sum += MathLib.pow(fftd[i], 2);
  }
  return MathLib.sqrt(new BigDecimal(sum).divide(new BigDecimal(divisor), 10, RoundingMode.HALF_UP).doubleValue());
}

Amount<Q> m = Amount.newInstance(_unit.root(n));
if (this._isExact) {
  double rootDouble = MathLib.pow(_exactValue, 1.0 / n);
  long rootLong = (long) rootDouble;
  long thisLong = rootLong;
    return m.setExact(rootLong);
double min = MathLib.pow(_minimum, 1.0 / n);
double max = MathLib.pow(_maximum, 1.0 / n);
m._isExact = false;
m._minimum = (min < 0) ? min * INCREMENT : min * DECREMENT;

/**
 * Returns this complex raised to the specified power.
 *
 * @param   e the exponent.
 * @return  <code>this**e</code>.
 */
public Complex pow(double e) {
  Complex c = FACTORY.object();
  double m = MathLib.pow(this.magnitude(), e);
  double a = this.argument() * e;
  c._real = m * MathLib.cos(a);
  c._imaginary = m * MathLib.sin(a);
  return c;
}