Package PamUtils

Class MatrixOps

java.lang.Object

PamUtils.MatrixOps

public class MatrixOps
extends Object

Matrix operations for arrays of Complex data Really need to write these for ComplexArray rather than Complex[] since it's a lot faster. Widely used in the DIFAR module.

Author:

dg50

Constructor Summary

Constructors

Constructor	Description
MatrixOps()

Method Summary

Modifier and Type	Method	Description
static boolean	applyMask(double[] ary, double[] windowFunction)
static boolean	applyMask(Complex[] ary, double[] windowFunction)
static boolean	checkRectangular(double[][] a)
static boolean	checkRectangular(Complex[][] a)	Check the array is rectangular, => all sub arrays are same length.
static Complex[][]	complexMatrixCross(Complex[][] a, Complex[][] b)
static BufferedImage	createImage(double[][] surfaceData, ColourArray colorArray, boolean logScale, double intensityScaleFactor)
static Complex	det33Matrix(Complex[][] A)
static Complex	detNnMatrix(Complex[][] A)
static double[][]	getAbsMatrix(double[][] matrix)	Make a new matrix with abs values of the original.
static double[][]	getRealMatrix(Complex[][] a)
static Complex[][]	inverse33Matrix(Complex[][] A)
static Complex[][]	inverseNnMatrix(Complex[][] A)
static void	printMatrix(Complex[][] a)	debug tool print a complex matrix (with no null entries) to std out
static Complex	recipComp(Complex z)
static Complex[][]	scalarMultMatrix(Complex[][] a, Complex scalar)
static Complex[][]	transposeMatrix(Complex[][] a)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MatrixOps

public MatrixOps()

Method Details

checkRectangular

public static boolean checkRectangular(Complex[][] a)

Check the array is rectangular, => all sub arrays are same length.

Parameters:

a - A 2D Complex Array

Returns:

false if null,

true if 0-length or is rectangular

complexMatrixCross

public static Complex[][] complexMatrixCross(Complex[][] a,
 Complex[][] b)

transposeMatrix

public static Complex[][] transposeMatrix(Complex[][] a)

scalarMultMatrix

public static Complex[][] scalarMultMatrix(Complex[][] a,
 Complex scalar)

printMatrix

public static void printMatrix(Complex[][] a)

debug tool
print a complex matrix (with no null entries) to std out

Parameters:

a -

getRealMatrix

public static double[][] getRealMatrix(Complex[][] a)

Parameters:

a - Complex 2D array

Returns:

the real parts in a double 2d array

det33Matrix

public static Complex det33Matrix(Complex[][] A)

Returns:

determinant

detNnMatrix

public static Complex detNnMatrix(Complex[][] A)

inverse33Matrix

public static Complex[][] inverse33Matrix(Complex[][] A)

inverseNnMatrix

public static Complex[][] inverseNnMatrix(Complex[][] A)

recipComp

public static Complex recipComp(Complex z)

getAbsMatrix

public static double[][] getAbsMatrix(double[][] matrix)

Make a new matrix with abs values of the original.

Parameters:

matrix -

Returns:

createImage

public static BufferedImage createImage(double[][] surfaceData,
 ColourArray colorArray,
 boolean logScale,
 double intensityScaleFactor)

checkRectangular

public static boolean checkRectangular(double[][] a)

applyMask

public static boolean applyMask(Complex[] ary,
 double[] windowFunction)

applyMask

public static boolean applyMask(double[] ary,
 double[] windowFunction)