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java.lang.Objectorg.apache.commons.math3.transform.TransformUtils
public class TransformUtils
Useful functions for the implementation of various transforms.
| Method Summary | |
|---|---|
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. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Method Detail |
|---|
public static double[] scaleArray(double[] f,
double d)
f - the real array to be scaledd - the real scaling coefficient
public static Complex[] scaleArray(Complex[] f,
double d)
f - the complex array to be scaledd - the real scaling coefficient
public 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 transformed
public 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 transformed
Complex with specified real and imaginary parts.
DimensionMismatchException - if the number of rows of the specified
array is not two, or the array is not rectangular
public 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 evaluated
n
MathIllegalArgumentException - if n is not a power of two
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