org.apache.sysds.runtime.compress.estim.sample

Class HassAndStokes

java.lang.Object

org.apache.sysds.runtime.compress.estim.sample.HassAndStokes

public class HassAndStokes
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static double	HAAS_AND_STOKES_ALPHA1
static double	HAAS_AND_STOKES_ALPHA2
static int	HAAS_AND_STOKES_UJ2A_C
static boolean	HAAS_AND_STOKES_UJ2A_CUT2
static boolean	HAAS_AND_STOKES_UJ2A_SOLVE
static int	MAX_SOLVE_CACHE_SIZE

Constructor Summary

Constructors

Constructor and Description
HassAndStokes()

Method Summary

Modifier and Type	Method and Description
static int	haasAndStokes(ABitmap ubm, int nRows, int sampleSize, HashMap<Integer,Double> solveCache) Haas, Peter J., and Lynne Stokes.

Methods inherited from class java.lang.Object

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

Field Detail

HAAS_AND_STOKES_ALPHA1

public static final double HAAS_AND_STOKES_ALPHA1

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Constant Field Values

HAAS_AND_STOKES_ALPHA2

public static final double HAAS_AND_STOKES_ALPHA2

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Constant Field Values

HAAS_AND_STOKES_UJ2A_C

public static final int HAAS_AND_STOKES_UJ2A_C

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Constant Field Values

HAAS_AND_STOKES_UJ2A_CUT2

public static final boolean HAAS_AND_STOKES_UJ2A_CUT2

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Constant Field Values

HAAS_AND_STOKES_UJ2A_SOLVE

public static final boolean HAAS_AND_STOKES_UJ2A_SOLVE

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Constant Field Values

MAX_SOLVE_CACHE_SIZE

public static final int MAX_SOLVE_CACHE_SIZE

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Constant Field Values

Constructor Detail

HassAndStokes

public HassAndStokes()

Method Detail

haasAndStokes

public static int haasAndStokes(ABitmap ubm,
                                int nRows,
                                int sampleSize,
                                HashMap<Integer,Double> solveCache)

Haas, Peter J., and Lynne Stokes. "Estimating the number of classes in a finite population." Journal of the American Statistical Association 93.444 (1998): 1475-1487. The hybrid estimator given by Eq. 33 in Section 6

Parameters:

ubm - The Uncompressed Bit map

nRows - The number of rows originally in the input

sampleSize - The number of rows used in the sample

solveCache - A Hashmap containing information for getDuj2aEstimate

Returns:

An estimation of distinct elements in the population.