jdistlib.util

Class Utilities

java.lang.Object

jdistlib.util.Utilities

public class Utilities
extends java.lang.Object

Utility functions to mimic R

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Utilities.RankTies

Constructor Summary

Constructors

Constructor and Description
Utilities()

Method Summary

Modifier and Type	Method and Description
static boolean	any(boolean... x)
static boolean	anyNA(double... x)
static double[]	c(double... x)
static double[]	c(double[]... x)
static int[]	c(int... x)
static int[]	c(int[]... x)
static double[]	colon(double from, double to)
static int[]	colon(int from, int to)
static double[]	index_min1(double[] x, int[] idx) Mimic x[idx] behavior of R
static double[]	index(double[] x, int[] idx) Mimic x[idx] behavior of R
static boolean[]	is_duplicated(double[] e)
static <S> boolean[]	is_duplicated(S[] e)
static int[]	match(double[] x, double[] y) Mimic the behavior of match function in R.
static int[]	match(int[] x, int[] y)
static <S> int[]	match(S[] x, S[] y)
static int[]	order(double[] e) Returns the order of the elements of array e
static void	permute(double[] e) Permute the array e
static void	permute(double[] e, RandomEngine random) Permute the array e
static void	print(double... val)
static void	print(java.lang.String format, double... val)
static double[]	rank(double[] e) Returns the ranks of the elements of array e, resolve ties by averaging
static double[]	rank(double[] e, Utilities.RankTies ties) Returns the ranks of the elements of array e.
static double[]	rec(double[] e)
static double[]	rep_each(double[] v, int n)
static int[]	rep_each(int[] v, int n)
static double[]	rep(double[] v, int n)
static double[]	rep(double v, int n)
static double[]	rev(double[] e)
static double[][]	rle(double[] e) Compute RLE
static double[]	sample_int(int n, int s) Sample from 1 to n, with size s, without replacement---with default random engine
static double[]	sample_int(int n, int s, RandomEngine random) Sample from 1 to n, with size s, without replacement
static int[]	seq_along(double[] z)
static double[]	seq_int(double from, double to, int length_out)
static double[]	seq(double from, double to, double by)
static int[]	seq(int from, int to, int by)
static void	sort(double[] data) Sort data using radix sort
static void	sort(double[] data, int[] idx) Sort using radix sort
static <T> void	sort(double[] data, T[] obj) Sort using radix sort
static void	sort(int[] a) Radix sort
static void	sort(int[] data, int[] idx)
static <T> void	sort(int[] data, T[] idx)
static void	sort(long[] a) Radix sort
static void	sort(long[] data, int[] idx)
static <T> void	sort(long[] data, T[] idx)
static int[]	tabulate(int[] x, int n) Mimic the tabulate function in R
static double[]	to_double_array(java.util.Collection<java.lang.Double> s)
static double[]	to_double(int[] e) Converts the integer array e into a double array
static int[]	to_int_array(java.util.Collection<java.lang.Integer> s)
static double[]	unique(double[] e)
static <S> S[]	unique(S[] e)
static int[]	which(boolean[] e)

Methods inherited from class java.lang.Object

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

Constructor Detail

Utilities

public Utilities()

Method Detail

colon

public static final int[] colon(int from,
                                int to)

colon

public static final double[] colon(double from,
                                   double to)

seq

public static final int[] seq(int from,
                              int to,
                              int by)

seq_int

public static final double[] seq_int(double from,
                                     double to,
                                     int length_out)

seq

public static final double[] seq(double from,
                                 double to,
                                 double by)

c

public static final int[] c(int[]... x)

c

public static final int[] c(int... x)

c

public static final double[] c(double[]... x)

c

public static final double[] c(double... x)

rep

public static final double[] rep(double v,
                                 int n)

rep

public static final double[] rep(double[] v,
                                 int n)

rep_each

public static final double[] rep_each(double[] v,
                                      int n)

rep_each

public static final int[] rep_each(int[] v,
                                   int n)

rec

public static final double[] rec(double[] e)

rev

public static final double[] rev(double[] e)

print

public static final void print(double... val)

print

public static final void print(java.lang.String format,
                               double... val)

sort

public static final void sort(double[] data)

Sort data using radix sort

Parameters:

data -

sort

public static final void sort(double[] data,
                              int[] idx)

Sort using radix sort

Parameters:

data -

idx - an index of data, of the same length, useful to sort an entire table

sort

public static final <T> void sort(double[] data,
                                  T[] obj)

Sort using radix sort

Parameters:

data -

obj - an auxiliary array of objects

sort

public static final void sort(int[] a)

Radix sort

Parameters:

a -

sort

public static final void sort(int[] data,
                              int[] idx)

sort

public static final <T> void sort(int[] data,
                                  T[] idx)

sort

public static final void sort(long[] a)

Radix sort

Parameters:

a -

sort

public static final void sort(long[] data,
                              int[] idx)

sort

public static final <T> void sort(long[] data,
                                  T[] idx)

to_double

public static final double[] to_double(int[] e)

Converts the integer array e into a double array

Parameters:

e -

Returns:

a double array

order

public static final int[] order(double[] e)

Returns the order of the elements of array e

Parameters:

e -

rank

public static final double[] rank(double[] e)

Returns the ranks of the elements of array e, resolve ties by averaging

Parameters:

e -

rank

public static final double[] rank(double[] e,
                                  Utilities.RankTies ties)

Returns the ranks of the elements of array e.

Parameters:

e -

ties - Ties resolution: Average, Min, or Max

Returns:

NOTE: Rank is index 1-based!

permute

public static final void permute(double[] e)

Permute the array e

Parameters:

e -

permute

public static final void permute(double[] e,
                                 RandomEngine random)

Permute the array e

Parameters:

e -

random -

sample_int

public static final double[] sample_int(int n,
                                        int s)

Sample from 1 to n, with size s, without replacement---with default random engine

Parameters:

n -

s -

Returns:

a sampled array of size s

sample_int

public static final double[] sample_int(int n,
                                        int s,
                                        RandomEngine random)

Sample from 1 to n, with size s, without replacement

Parameters:

n -

s -

random - random engine

Returns:

a sampled array of size s

unique

public static final double[] unique(double[] e)

unique

public static final <S> S[] unique(S[] e)

is_duplicated

public static final boolean[] is_duplicated(double[] e)

is_duplicated

public static final <S> boolean[] is_duplicated(S[] e)

which

public static final int[] which(boolean[] e)

rle

public static final double[][] rle(double[] e)

Compute RLE

Parameters:

e -

Returns:

Double dimension array of 2 x e.length. The first contains the values. The second contains the lengths.

match

public static final int[] match(double[] x,
                                double[] y)

Mimic the behavior of match function in R.

Parameters:

x -

y -

Returns:

match index

match

public static final int[] match(int[] x,
                                int[] y)

match

public static final <S> int[] match(S[] x,
                                    S[] y)

tabulate

public static final int[] tabulate(int[] x,
                                   int n)

Mimic the tabulate function in R

Parameters:

x -

n -

Returns:

tabulate

seq_along

public static final int[] seq_along(double[] z)

index

public static final double[] index(double[] x,
                                   int[] idx)

Mimic x[idx] behavior of R

Parameters:

x -

idx -

Returns:

array

index_min1

public static final double[] index_min1(double[] x,
                                        int[] idx)

Mimic x[idx] behavior of R

Parameters:

x -

idx -

Returns:

array

to_int_array

public static final int[] to_int_array(java.util.Collection<java.lang.Integer> s)

to_double_array

public static final double[] to_double_array(java.util.Collection<java.lang.Double> s)

any

public static final boolean any(boolean... x)

anyNA

public static final boolean anyNA(double... x)