meka.core

Class A

java.lang.Object

meka.core.A

public abstract class A
extends java.lang.Object

A.java - Handy array operations

Version:

April 2014

Author:

Jesse Read

Constructor Summary

Constructors

Constructor and Description
A()

Method Summary

Methods

Modifier and Type	Method and Description
static int[]	append(int[] array, int v)
static int[]	delete(int[] array, int i)
static int[]	delete(int[] array, int[] i)
static int[]	invert(int[] indices, int L) Invert - take the compliment of indices up to length L, e.g., if indices = [3,5,6], then invert(indices,7) = [1,2,4,7].
static int[]	join(int[] a, int[] b)
static int[]	make_sequence(int L) Make Sequence - Given L, generate and return new int[]{0,1,2,3,...,L-1}.
static int[]	make_sequence(int start, int end) Make Sequence - Generate and return new int[]{start,start+1,...,end-2,end-1}.
static int	mode(int[] a) Mode
static double	product(double[] v)
static int[]	reverse(int[] a)
static int	samplePMF(double[] w, java.util.Random r) Sample a PMF - select i with probabilitiy w[i] (w must be normalised)
static int[]	select(int[] array, int[] indices)
static void	shuffle(int[] array, java.util.Random r) Shuffle 'array' given Random 'r'
static int[]	sort(int[] a)
static double	sum(double[] v)
static int	sum(int[] v)
static int[]	swap(int[] array, int j, int k)
static int[]	swap(int[] array, java.util.Random r)
static double[]	toDoubleArray(int[] z) ToDoubleArray - cast int[] to double[].
static double[]	toDoubleArray(int i, int L) Convert integer to binary string (double representation) of L digits.
static int[]	toIntArray(double[] z)
static int[]	toIntArray(double[] z, double t)
static int[]	toIntArray(java.lang.String s) Convert eg "12" to [1,2]
static int[]	toIntArray(java.lang.String[] s) Convert eg ["1","2"] to [1,2]
static int[]	toPrimitive(java.lang.Integer[] a) ToPrimitive - cast Integer[] to int[].
static int[]	toPrimitive(java.util.List<java.lang.Integer> list) ToPrimitive - cast List<Integer> to int[].
static java.lang.String	toString(double[] v) ToString - Return a double[] as a nice String.
static java.lang.String	toString(double[] v, int adp) ToString - Return a double[] as a nice String (formated to a 'adp' digits after the decimal point).
static java.lang.String	toString(int[] v) ToString - Return an int[] as a nice String.

Methods inherited from class java.lang.Object

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

Constructor Detail

A

public A()

Method Detail

join

public static final int[] join(int[] a,
         int[] b)

reverse

public static final int[] reverse(int[] a)

sort

public static final int[] sort(int[] a)

toString

public static java.lang.String toString(double[] v)

ToString - Return a double[] as a nice String.

toString

public static java.lang.String toString(double[] v,
                        int adp)

ToString - Return a double[] as a nice String (formated to a 'adp' digits after the decimal point).

toString

public static java.lang.String toString(int[] v)

ToString - Return an int[] as a nice String.

product

public static final double product(double[] v)

sum

public static double sum(double[] v)

sum

public static int sum(int[] v)

mode

public static int mode(int[] a)

Mode

append

public static int[] append(int[] array,
           int v)

delete

public static int[] delete(int[] array,
           int i)

delete

public static int[] delete(int[] array,
           int[] i)

select

public static int[] select(int[] array,
           int[] indices)

swap

public static int[] swap(int[] array,
         int j,
         int k)

swap

public static int[] swap(int[] array,
         java.util.Random r)

samplePMF

public static int samplePMF(double[] w,
            java.util.Random r)

Sample a PMF - select i with probabilitiy w[i] (w must be normalised)

make_sequence

public static final int[] make_sequence(int L)

Make Sequence - Given L, generate and return new int[]{0,1,2,3,...,L-1}.

make_sequence

public static final int[] make_sequence(int start,
                  int end)

Make Sequence - Generate and return new int[]{start,start+1,...,end-2,end-1}.

invert

public static final int[] invert(int[] indices,
           int L)

Invert - take the compliment of indices up to length L, e.g., if indices = [3,5,6], then invert(indices,7) = [1,2,4,7].

Parameters:

indices - indices

L - supposed length of the compliment

Returns:

the compliment (inverted list)

shuffle

public static final void shuffle(int[] array,
           java.util.Random r)

Shuffle 'array' given Random 'r'

toPrimitive

public static int[] toPrimitive(java.lang.Integer[] a)

ToPrimitive - cast Integer[] to int[].

toPrimitive

public static int[] toPrimitive(java.util.List<java.lang.Integer> list)

ToPrimitive - cast List<Integer> to int[].

toDoubleArray

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

ToDoubleArray - cast int[] to double[].

toIntArray

public static final int[] toIntArray(java.lang.String s)

Convert eg "12" to [1,2]

toIntArray

public static final int[] toIntArray(java.lang.String[] s)

Convert eg ["1","2"] to [1,2]

toIntArray

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

toIntArray

public static final int[] toIntArray(double[] z,
               double t)

toDoubleArray

public static final double[] toDoubleArray(int i,
                     int L)

Convert integer to binary string (double representation) of L digits. e.g., toDoubleArray(3,4) = [0., 0., 1., 1.]