Method Detail

• scaleArray

  public static double[] scaleArray(double[] f,
                    double d)

  Multiply every component in the given real array by the given real number. The change is made in place.

  Parameters:

  f - the real array to be scaled

  d - the real scaling coefficient

  Returns:

  a reference to the scaled array

• scaleArray

  public static Complex[] scaleArray(Complex[] f,
                     double d)

  Multiply every component in the given complex array by the given real number. The change is made in place.

  Parameters:

  f - the complex array to be scaled

  d - the real scaling coefficient

  Returns:

  a reference to the scaled array

• createRealImaginaryArray

  public static double[][] createRealImaginaryArray(Complex[] dataC)

  Builds a new two dimensional array of double filled with the real and imaginary parts of the specified Complex numbers. In the returned array dataRI, the data is laid out as follows

  • dataRI[0][i] = dataC[i].getReal(),
  • dataRI[1][i] = dataC[i].getImaginary().

  Parameters:

  dataC - the array of Complex data to be transformed

  Returns:

  a two dimensional array filled with the real and imaginary parts of the specified complex input

• createComplexArray

  public static Complex[] createComplexArray(double[][] dataRI)
                                      throws DimensionMismatchException

  Builds a new array of Complex from the specified two dimensional array of real and imaginary parts. In the returned array dataC, the data is laid out as follows

  • dataC[i].getReal() = dataRI[0][i],
  • dataC[i].getImaginary() = dataRI[1][i].

  Parameters:

  dataRI - the array of real and imaginary parts to be transformed

  Returns:

  an array of Complex with specified real and imaginary parts.

  Throws:

  DimensionMismatchException - if the number of rows of the specified array is not two, or the array is not rectangular

• exactLog2

  public static int exactLog2(int n)
                       throws MathIllegalArgumentException

  Returns the base-2 logarithm of the specified int. Throws an exception if n is not a power of two.

  Parameters:

  n - the int whose base-2 logarithm is to be evaluated

  Returns:

  the base-2 logarithm of n

  Throws:

  MathIllegalArgumentException - if n is not a power of two