public class BTMutualInformation extends Measure
Measure
that computes a maximum spanning tree
based on mutual information and uses the resulting tree structure as
structure of a Bayesian tree (special case of a Bayesian network) in a
BayesianNetworkDiffSM
.Modifier and Type | Class and Description |
---|---|
static class |
BTMutualInformation.BTMutualInformationParameterSet
Class for the parameters of a
BTMutualInformation structure
Measure . |
static class |
BTMutualInformation.DataSource
Enum defining the possible sources of data to compute the mutual
information. |
Measure.MeasureParameterSet
parameters
Constructor and Description |
---|
BTMutualInformation(BTMutualInformation.BTMutualInformationParameterSet parameters)
|
BTMutualInformation(BTMutualInformation.DataSource clazz,
double[] ess)
Creates a new mutual information Bayesian tree
Measure . |
BTMutualInformation(StringBuffer buf)
The standard constructor for the interface
Storable . |
Modifier and Type | Method and Description |
---|---|
String |
getInstanceName()
Returns the name of the
Measure and possibly some additional
information about the current instance. |
int[][] |
getParents(DataSet fg,
DataSet bg,
double[] weightsFg,
double[] weightsBg,
int length)
Returns the optimal parents for the given data and weights.
|
String |
getXMLTag()
Returns the XML-tag for storing this measure
|
clone, fillTensor, fillTensor, fromXML, getCMI, getCMI, getCurrentParameterSet, getEAR, getEAR, getMatrixForKruskal, getMI, getMI, getStatistics, getStatisticsOrderTwo, isShiftable, reStructure, sum, toParents, toXML, union
public BTMutualInformation(StringBuffer buf) throws NonParsableException
Storable
.
Recreates a BTMutualInformation
from is XML representation as
returned by Measure.toXML()
.buf
- the XML representation as StringBuffer
NonParsableException
- if the XML code could not be parsedpublic BTMutualInformation(BTMutualInformation.DataSource clazz, double[] ess) throws CloneNotSupportedException, Exception
Measure
.clazz
- the classes used for computation of mutual information, as
defined by BTMutualInformation.DataSource
ess
- the equivalent sample sizes for both classesCloneNotSupportedException
- if the parameters could not be createdException
- if the parameters could not be created for the ess
public BTMutualInformation(BTMutualInformation.BTMutualInformationParameterSet parameters) throws CloneNotSupportedException
parameters
- the corresponding parametersCloneNotSupportedException
- if the parameters could not be clonedpublic String getInstanceName()
Measure
Measure
and possibly some additional
information about the current instance.getInstanceName
in class Measure
Measure
public int[][] getParents(DataSet fg, DataSet bg, double[] weightsFg, double[] weightsBg, int length) throws Exception
Measure
p
at each position i
is build
as follows:
p[i][p.length - 1]
contains the index i
itselfp[i][p.length - 2]
contains the "most
important" parentp[i][0]
contains the "least important" parentgetParents
in class Measure
fg
- the data of the current (foreground) classbg
- the data of the negative (background) classweightsFg
- the weights for the sequences of fg
weightsBg
- the weights for the sequences of bg
length
- the length of the model, must be equal to the length of the
sequencesp
with the optimal parentsException
- if the lengths do not match or other problems concerning the
data occur