Class FloatHistogram

java.lang.Object

com.tdunning.math.stats.FloatHistogram

All Implemented Interfaces:

Serializable

public class FloatHistogram
extends Object
implements Serializable

Maintains histogram buckets that are constant width in base-2 floating point representation space. This is close to exponential binning, but should be much faster.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private int	bitsOfPrecision
private long[]	counts
private double	max
private double	min
private int	offset
private int	shift

Constructor Summary

Constructors

Constructor	Description
FloatHistogram()
FloatHistogram(double min, double max)
FloatHistogram(double min, double max, double binsPerDecade)

Method Summary

Modifier and Type	Method	Description
void	add(double v)
(package private) int	bucket(double x)
private int	bucketIndex(double x)
double[]	getBounds()
long[]	getCompressedCounts()
long[]	getCounts()
private double	lowerBound(int k)
void	readObject(ObjectInputStream in)
private void	readObjectNoData()
void	writeObject(ObjectOutputStream out)

Methods inherited from class Object

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

Field Details

counts

private long[] counts

min

private double min

max

private double max

bitsOfPrecision

private int bitsOfPrecision

shift

private int shift

offset

private int offset

Constructor Details

FloatHistogram

FloatHistogram()

FloatHistogram

public FloatHistogram(double min,
 double max)

FloatHistogram

public FloatHistogram(double min,
 double max,
 double binsPerDecade)

Method Details

bucket

int bucket(double x)

bucketIndex

private int bucketIndex(double x)

lowerBound

private double lowerBound(int k)

add

public void add(double v)

getBounds

public double[] getBounds()

getCounts

public long[] getCounts()

getCompressedCounts

public long[] getCompressedCounts()

writeObject

public void writeObject(ObjectOutputStream out)
                 throws IOException

Throws:

IOException

readObject

public void readObject(ObjectInputStream in)
                throws IOException

Throws:

IOException

readObjectNoData

private void readObjectNoData()
                       throws ObjectStreamException

Throws:

ObjectStreamException