public class TransformUtils extends Object
| Modifier and Type | Method and Description |
|---|---|
static Complex[] |
createComplexArray(double[][] dataRI)
Builds a new array of
Complex from the specified two dimensional
array of real and imaginary parts. |
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. |
static int |
exactLog2(int n)
Returns the base-2 logarithm of the specified
int. |
static Complex[] |
scaleArray(Complex[] f,
double d)
Multiply every component in the given complex array by the
given real number.
|
static double[] |
scaleArray(double[] f,
double d)
Multiply every component in the given real array by the
given real number.
|
public static double[] scaleArray(double[] f,
double d)
f - the real array to be scaledd - the real scaling coefficientpublic static Complex[] scaleArray(Complex[] f, double d)
f - the complex array to be scaledd - the real scaling coefficientpublic static double[][] createRealImaginaryArray(Complex[] dataC)
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().dataC - the array of Complex data to be transformedpublic static Complex[] createComplexArray(double[][] dataRI) throws DimensionMismatchException
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].dataRI - the array of real and imaginary parts to be transformedComplex with specified real and imaginary parts.DimensionMismatchException - if the number of rows of the specified
array is not two, or the array is not rectangularpublic static int exactLog2(int n)
throws MathIllegalArgumentException
int. Throws an
exception if n is not a power of two.n - the int whose base-2 logarithm is to be evaluatednMathIllegalArgumentException - if n is not a power of twoCopyright © 2003–2016 The Apache Software Foundation. All rights reserved.