weka.core.stats

Class StringStats

java.lang.Object

weka.core.stats.Stats

weka.core.stats.StringStats

All Implemented Interfaces:

java.io.Serializable

public class StringStats
extends Stats
implements java.io.Serializable

Class for computing string-related stats. Computes counts, means, min max etc. for string length and word count

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
StringStats(java.lang.String attributeName) Constructs a new StringStats

Method Summary

Modifier and Type	Method and Description
static StringStats	attributeToStats(weka.core.Attribute a) Convert a meta summary attribute containing string stats into a StringStats object
void	computeDerived() Compute derived statistics - e.g.
NumericStats	getStringLengthStats() Get the underlying NumericStats object that is tracking string length stats
NumericStats	getWordCountStats() Get the underlying NumericStats object that is tracking word count stats
weka.core.Attribute	makeAttribute() Makes a Attribute that encapsulates the meta data
void	update(java.lang.String value, double weight) Update with a new value

Methods inherited from class weka.core.stats.Stats

getName

Methods inherited from class java.lang.Object

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

Constructor Detail

StringStats

public StringStats(java.lang.String attributeName)

Constructs a new StringStats

Parameters:

attributeName - the name of the attribute/field to collect stats for

Method Detail

getStringLengthStats

public NumericStats getStringLengthStats()

Get the underlying NumericStats object that is tracking string length stats

Returns:

the string length stats

getWordCountStats

public NumericStats getWordCountStats()

Get the underlying NumericStats object that is tracking word count stats

Returns:

the word count stats

makeAttribute

public weka.core.Attribute makeAttribute()

Description copied from class: Stats

Makes a Attribute that encapsulates the meta data

Specified by:

makeAttribute in class Stats

Returns:

an Attribute that encapsulates the meta data

update

public void update(java.lang.String value,
                   double weight)

Update with a new value

Parameters:

value - the string value to update with

weight - the weight for the update

computeDerived

public void computeDerived()

Compute derived statistics - e.g. mean, standard deviation

attributeToStats

public static StringStats attributeToStats(weka.core.Attribute a)

Convert a meta summary attribute containing string stats into a StringStats object

Parameters:

a - a meta summary attribute

Returns:

a StringStats object