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Java Source Code / Java Documentation » Science » Apache commons math 1.1 » org.apache.commons.math.stat

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.apache.commons.math.stat .Frequency

Frequency

public class Frequency implements Serializable(Code)

Maintains a frequency distribution.

Accepts int, long, char or Object values. New values added must be comparable to those that have been added, otherwise the add method will throw an IllegalArgumentException.

Integer values (int, long, Integer, Long) are not distinguished by type -- i.e. addValue(new Long(2)), addValue(2), addValue(2l) all have the same effect (similarly for arguments to getCount, etc.).

The values are ordered using the default (natural order), unless a Comparator is supplied in the constructor.
version:
$Revision: 348519 $ $Date: 2005-11-23 12:12:18 -0700 (Wed, 23 Nov 2005) $

Constructor Summary
public	Frequency() Default constructor.
public	Frequency(Comparator comparator) Constructor allowing values Comparator to be specified.

Method Summary
public void	addValue(Object v) Adds 1 to the frequency count for v.
public void	addValue(int v) Adds 1 to the frequency count for v.
public void	addValue(Integer v) Adds 1 to the frequency count for v.
public void	addValue(long v) Adds 1 to the frequency count for v.
public void	addValue(char v) Adds 1 to the frequency count for v.
public void	clear()
public long	getCount(Object v) Returns the number of values = v. Parameters: v - the value to lookup.
public long	getCount(int v) Returns the number of values = v. Parameters: v - the value to lookup.
public long	getCount(long v) Returns the number of values = v. Parameters: v - the value to lookup.
public long	getCount(char v) Returns the number of values = v. Parameters: v - the value to lookup.
public long	getCumFreq(Object v) Returns the cumulative frequency of values less than or equal to v. Returns 0 if v is not comparable to the values set. Parameters: v - the value to lookup.
public long	getCumFreq(int v) Returns the cumulative frequency of values less than or equal to v.
public long	getCumFreq(long v) Returns the cumulative frequency of values less than or equal to v.
public long	getCumFreq(char v) Returns the cumulative frequency of values less than or equal to v.
public double	getCumPct(Object v) Returns the cumulative percentage of values less than or equal to v (as a proportion between 0 and 1).
public double	getCumPct(int v) Returns the cumulative percentage of values less than or equal to v (as a proportion between 0 and 1).
public double	getCumPct(long v) Returns the cumulative percentage of values less than or equal to v (as a proportion between 0 and 1).
public double	getCumPct(char v) Returns the cumulative percentage of values less than or equal to v (as a proportion between 0 and 1).
public double	getPct(Object v) Returns the percentage of values that are equal to v (as a proportion between 0 and 1).
public double	getPct(int v) Returns the percentage of values that are equal to v (as a proportion between 0 and 1).
public double	getPct(long v) Returns the percentage of values that are equal to v (as a proportion between 0 and 1).
public double	getPct(char v) Returns the percentage of values that are equal to v (as a proportion between 0 and 1).
public long	getSumFreq() Returns the sum of all frequencies.
public String	toString() Return a string representation of this frequency distribution.
public Iterator	valuesIterator() Returns an Iterator over the set of values that have been added.

Constructor Detail

Frequency
public Frequency()(Code)
	Default constructor.

Frequency
public Frequency(Comparator comparator)(Code)
	Constructor allowing values Comparator to be specified. Parameters: comparator - Comparator used to order values

Method Detail

addValue
public void addValue(Object v)(Code)
	Adds 1 to the frequency count for v. Parameters: v - the value to add. throws: IllegalArgumentException - if `v` is not comparable.

addValue
public void addValue(int v)(Code)
	Adds 1 to the frequency count for v. Parameters: v - the value to add.

addValue
public void addValue(Integer v)(Code)
	Adds 1 to the frequency count for v. Parameters: v - the value to add.

addValue
public void addValue(long v)(Code)
	Adds 1 to the frequency count for v. Parameters: v - the value to add.

addValue
public void addValue(char v)(Code)
	Adds 1 to the frequency count for v. Parameters: v - the value to add.

clear
public void clear()(Code)
	Clears the frequency table

getCount
public long getCount(Object v)(Code)
	Returns the number of values = v. Parameters: v - the value to lookup. the frequency of v.

getCount
public long getCount(int v)(Code)
	Returns the number of values = v. Parameters: v - the value to lookup. the frequency of v.

getCount
public long getCount(long v)(Code)
	Returns the number of values = v. Parameters: v - the value to lookup. the frequency of v.

getCount
public long getCount(char v)(Code)
	Returns the number of values = v. Parameters: v - the value to lookup. the frequency of v.

getCumFreq
public long getCumFreq(Object v)(Code)
	Returns the cumulative frequency of values less than or equal to v. Returns 0 if v is not comparable to the values set. Parameters: v - the value to lookup. the proportion of values equal to v

getCumFreq
public long getCumFreq(int v)(Code)
	Returns the cumulative frequency of values less than or equal to v. Returns 0 if v is not comparable to the values set. Parameters: v - the value to lookup the proportion of values equal to v

getCumFreq
public long getCumFreq(long v)(Code)
	Returns the cumulative frequency of values less than or equal to v. Returns 0 if v is not comparable to the values set. Parameters: v - the value to lookup the proportion of values equal to v

getCumFreq
public long getCumFreq(char v)(Code)
	Returns the cumulative frequency of values less than or equal to v. Returns 0 if v is not comparable to the values set. Parameters: v - the value to lookup the proportion of values equal to v

getCumPct
public double getCumPct(Object v)(Code)
	Returns the cumulative percentage of values less than or equal to v (as a proportion between 0 and 1). Returns `Double.NaN` if no values have been added. Returns 0 if at least one value has been added, but v is not comparable to the values set. Parameters: v - the value to lookup the proportion of values less than or equal to v

getCumPct
public double getCumPct(int v)(Code)
	Returns the cumulative percentage of values less than or equal to v (as a proportion between 0 and 1). Returns 0 if v is not comparable to the values set. Parameters: v - the value to lookup the proportion of values less than or equal to v

getCumPct
public double getCumPct(long v)(Code)
	Returns the cumulative percentage of values less than or equal to v (as a proportion between 0 and 1). Returns 0 if v is not comparable to the values set. Parameters: v - the value to lookup the proportion of values less than or equal to v

getCumPct
public double getCumPct(char v)(Code)
	Returns the cumulative percentage of values less than or equal to v (as a proportion between 0 and 1). Returns 0 if v is not comparable to the values set. Parameters: v - the value to lookup the proportion of values less than or equal to v

getPct
public double getPct(Object v)(Code)
	Returns the percentage of values that are equal to v (as a proportion between 0 and 1). Returns `Double.NaN` if no values have been added. Parameters: v - the value to lookup the proportion of values equal to v

getPct
public double getPct(int v)(Code)
	Returns the percentage of values that are equal to v (as a proportion between 0 and 1). Parameters: v - the value to lookup the proportion of values equal to v

getPct
public double getPct(long v)(Code)
	Returns the percentage of values that are equal to v (as a proportion between 0 and 1). Parameters: v - the value to lookup the proportion of values equal to v

getPct
public double getPct(char v)(Code)
	Returns the percentage of values that are equal to v (as a proportion between 0 and 1). Parameters: v - the value to lookup the proportion of values equal to v

getSumFreq
public long getSumFreq()(Code)
	Returns the sum of all frequencies. the total frequency count.

toString
public String toString()(Code)
	Return a string representation of this frequency distribution. a string representation.

valuesIterator
public Iterator valuesIterator()(Code)
	Returns an Iterator over the set of values that have been added. If added values are itegral (i.e., integers, longs, Integers, or Longs), they are converted to Longs when they are added, so the objects returned by the Iterator will in this case be Longs. values Iterator

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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