Package moa.recommender.predictor
Class BaselinePredictor
- java.lang.Object
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- moa.AbstractMOAObject
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- moa.options.AbstractOptionHandler
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- moa.recommender.predictor.BaselinePredictor
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- All Implemented Interfaces:
Configurable
,Serializable
,MOAObject
,OptionHandler
,RatingPredictor
public class BaselinePredictor extends AbstractOptionHandler implements RatingPredictor
A naive algorithm which combines the global mean of all the existing ratings, the mean rating of the user and the mean rating of the item to make a prediction.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description ClassOption
dataOption
protected BaselinePredictor
rp
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Fields inherited from class moa.options.AbstractOptionHandler
config
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Constructor Summary
Constructors Constructor Description BaselinePredictor()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description RecommenderData
getData()
void
getDescription(StringBuilder sb, int indent)
Returns a string representation of this object.double
predictRating(int userID, int itemID)
double
predictRating(Integer user, Integer item)
List<Double>
predictRatings(int userID, List<Integer> itemIDS)
protected void
prepareForUseImpl(TaskMonitor monitor, ObjectRepository repository)
This method describes the implementation of how to prepare this object for use.void
train()
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Methods inherited from class moa.options.AbstractOptionHandler
copy, getCLICreationString, getOptions, getPreparedClassOption, getPurposeString, prepareClassOptions, prepareForUse, prepareForUse
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Methods inherited from class moa.AbstractMOAObject
copy, measureByteSize, measureByteSize, toString
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface moa.MOAObject
measureByteSize
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Field Detail
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rp
protected BaselinePredictor rp
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dataOption
public ClassOption dataOption
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Method Detail
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prepareForUseImpl
protected void prepareForUseImpl(TaskMonitor monitor, ObjectRepository repository)
Description copied from class:AbstractOptionHandler
This method describes the implementation of how to prepare this object for use. All classes that extends this class have to implementprepareForUseImpl
and notprepareForUse
sinceprepareForUse
callsprepareForUseImpl
.- Specified by:
prepareForUseImpl
in classAbstractOptionHandler
- Parameters:
monitor
- the TaskMonitor to userepository
- the ObjectRepository to use
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getDescription
public void getDescription(StringBuilder sb, int indent)
Description copied from interface:MOAObject
Returns a string representation of this object. Used inAbstractMOAObject.toString
to give a string representation of the object.- Specified by:
getDescription
in interfaceMOAObject
- Parameters:
sb
- the stringbuilder to add the descriptionindent
- the number of characters to indent
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getData
public RecommenderData getData()
- Specified by:
getData
in interfaceRatingPredictor
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predictRating
public double predictRating(int userID, int itemID)
- Specified by:
predictRating
in interfaceRatingPredictor
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predictRatings
public List<Double> predictRatings(int userID, List<Integer> itemIDS)
- Specified by:
predictRatings
in interfaceRatingPredictor
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train
public void train()
- Specified by:
train
in interfaceRatingPredictor
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