org.ejml

Class UtilEjml

java.lang.Object

org.ejml.UtilEjml

public class UtilEjml
extends java.lang.Object

Various functions that are useful but don't have a clear location that they belong in.

Field Summary

Fields

Modifier and Type	Field and Description
static double	EPS
static float	F_EPS
static float	F_PI
static float	F_PI2
static float	F_PId2
static int	maxInverseSize
static double	PI
static double	PI2
static double	PId2
static float	TEST_F32
static float	TEST_F32_SQ
static double	TEST_F64
static double	TEST_F64_SQ
static float	TESTP_F32
static double	TESTP_F64

Constructor Summary

Constructors

Constructor and Description
UtilEjml()

Method Summary

Modifier and Type	Method and Description
static double[]	adjust(DGrowArray gwork, int desired) Resizes the array to ensure that it is at least of length desired and returns its internal array
static int[]	adjust(IGrowArray gwork, int desired) Resizes the array to ensure that it is at least of length desired and returns its internal array
static int[]	adjust(IGrowArray gwork, int desired, int zeroToM)
static int[]	adjustClear(IGrowArray gwork, int desired)
static java.lang.String	fancyString(double value, java.text.DecimalFormat format, boolean hasSpace, int length, int significant)
static java.lang.String	fancyString(double value, java.text.DecimalFormat format, int length, int significant)
static java.lang.String	fancyStringF(double value, java.text.DecimalFormat format, int length, int significant) Fixed length fancy formatting for doubles.
static boolean	isIdentical(double a, double b, double tol)
static boolean	isIdentical(float a, float b, float tol)
static boolean	isUncountable(double val)
static boolean	isUncountable(float val)
static double	max(double[] array, int start, int length)
static float	max(float[] array, int start, int length)
static void	memset(double[] data, double val, int length)
static void	memset(int[] data, int val, int length)
static DMatrixRMaj	parse_DDRM(java.lang.String s, int numColumns) Give a string of numbers it returns a DenseMatrix
static DMatrixSparseCSC	parse_DSCC(java.lang.String s, int numColumns)
static FMatrixRMaj	parse_FDRM(java.lang.String s, int numColumns) Give a string of numbers it returns a DenseMatrix
static int	permutationSign(int[] p, int N, int[] work)
static int[]	pivotVector(int[] pivots, int length, IGrowArray storage)
static float[]	randomVector_F32(java.util.Random rand, int length)
static double[]	randomVector_F64(java.util.Random rand, int length)
static <S extends Matrix,D extends Matrix> LinearSolver<S,D>	safe(LinearSolver<S,D> solver) Wraps a linear solver of any type with a safe solver the ensures inputs are not modified
static <D extends ReshapeMatrix> LinearSolverDense<D>	safe(LinearSolverDense<D> solver)
static <T> void	setnull(T[] array)
static void	shuffle(int[] list, int N, int start, int end, java.util.Random rand)
static int[]	shuffled(int N, int shuffleUpTo, java.util.Random rand)
static int[]	shuffled(int N, java.util.Random rand)
static int[]	shuffledSorted(int N, int shuffleUpTo, java.util.Random rand)
static java.lang.Integer[]	sortByIndex(double[] data, int size)
static java.lang.String	stringShapes(Matrix A, Matrix B)
static java.lang.String	stringShapes(Matrix A, Matrix B, Matrix C)

Methods inherited from class java.lang.Object

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

Field Detail

EPS

public static double EPS

F_EPS

public static float F_EPS

PI

public static double PI

PI2

public static double PI2

PId2

public static double PId2

F_PI

public static float F_PI

F_PI2

public static float F_PI2

F_PId2

public static float F_PId2

TEST_F32

public static float TEST_F32

TEST_F64

public static double TEST_F64

TESTP_F32

public static float TESTP_F32

TESTP_F64

public static double TESTP_F64

TEST_F32_SQ

public static float TEST_F32_SQ

TEST_F64_SQ

public static double TEST_F64_SQ

maxInverseSize

public static int maxInverseSize

Constructor Detail

UtilEjml

public UtilEjml()

Method Detail

safe

public static <S extends Matrix,D extends Matrix> LinearSolver<S,D> safe(LinearSolver<S,D> solver)

Wraps a linear solver of any type with a safe solver the ensures inputs are not modified

safe

public static <D extends ReshapeMatrix> LinearSolverDense<D> safe(LinearSolverDense<D> solver)

isUncountable

public static boolean isUncountable(double val)

isUncountable

public static boolean isUncountable(float val)

isIdentical

public static boolean isIdentical(double a,
                                  double b,
                                  double tol)

isIdentical

public static boolean isIdentical(float a,
                                  float b,
                                  float tol)

memset

public static void memset(double[] data,
                          double val,
                          int length)

memset

public static void memset(int[] data,
                          int val,
                          int length)

setnull

public static <T> void setnull(T[] array)

max

public static double max(double[] array,
                         int start,
                         int length)

max

public static float max(float[] array,
                        int start,
                        int length)

parse_DDRM

public static DMatrixRMaj parse_DDRM(java.lang.String s,
                                     int numColumns)

Give a string of numbers it returns a DenseMatrix

parse_FDRM

public static FMatrixRMaj parse_FDRM(java.lang.String s,
                                     int numColumns)

Give a string of numbers it returns a DenseMatrix

sortByIndex

public static java.lang.Integer[] sortByIndex(double[] data,
                                              int size)

parse_DSCC

public static DMatrixSparseCSC parse_DSCC(java.lang.String s,
                                          int numColumns)

shuffled

public static int[] shuffled(int N,
                             java.util.Random rand)

shuffled

public static int[] shuffled(int N,
                             int shuffleUpTo,
                             java.util.Random rand)

shuffledSorted

public static int[] shuffledSorted(int N,
                                   int shuffleUpTo,
                                   java.util.Random rand)

shuffle

public static void shuffle(int[] list,
                           int N,
                           int start,
                           int end,
                           java.util.Random rand)

pivotVector

public static int[] pivotVector(int[] pivots,
                                int length,
                                IGrowArray storage)

permutationSign

public static int permutationSign(int[] p,
                                  int N,
                                  int[] work)

randomVector_F64

public static double[] randomVector_F64(java.util.Random rand,
                                        int length)

randomVector_F32

public static float[] randomVector_F32(java.util.Random rand,
                                       int length)

stringShapes

public static java.lang.String stringShapes(Matrix A,
                                            Matrix B,
                                            Matrix C)

stringShapes

public static java.lang.String stringShapes(Matrix A,
                                            Matrix B)

fancyStringF

public static java.lang.String fancyStringF(double value,
                                            java.text.DecimalFormat format,
                                            int length,
                                            int significant)

Fixed length fancy formatting for doubles. If possible decimal notation is used. If all the significant digits can't be shown then it will switch to exponential notation. If not all the space is needed then it will be filled in to ensure it has the specified length.

Parameters:

value - value being formatted

format - default format before exponential

length - Maximum number of characters it can take.

significant - Number of significant decimal digits to show at a minimum.

Returns:

formatted string

fancyString

public static java.lang.String fancyString(double value,
                                           java.text.DecimalFormat format,
                                           int length,
                                           int significant)

fancyString

public static java.lang.String fancyString(double value,
                                           java.text.DecimalFormat format,
                                           boolean hasSpace,
                                           int length,
                                           int significant)

adjust

public static int[] adjust(IGrowArray gwork,
                           int desired)

Resizes the array to ensure that it is at least of length desired and returns its internal array

adjust

public static int[] adjust(IGrowArray gwork,
                           int desired,
                           int zeroToM)

adjustClear

public static int[] adjustClear(IGrowArray gwork,
                                int desired)

adjust

public static double[] adjust(DGrowArray gwork,
                              int desired)

Resizes the array to ensure that it is at least of length desired and returns its internal array