Package jdistlib.util

Class Utilities

java.lang.Object
jdistlib.util.Utilities
public class Utilities extends Object
Utility functions to mimic R

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static enum 
    Utilities.RankTies
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    Utilities()
     

  • Method Summary

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

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Utilities

      public Utilities()

  • Method Details

    • 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(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(Collection<Integer> s)

    • to_double_array

      public static final double[] to_double_array(Collection<Double> s)

    • any

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

    • anyNA

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