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 MathIllegalArgumentException
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.MathIllegalArgumentException
- 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 evaluatedn
MathIllegalArgumentException
- if n
is not a power of twoCopyright © 2016-2022 CS GROUP. All rights reserved.