Package weka.datagenerators
Class Test
- java.lang.Object
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- weka.datagenerators.Test
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- All Implemented Interfaces:
java.io.Serializable
,RevisionHandler
public class Test extends java.lang.Object implements java.io.Serializable, RevisionHandler
Class to represent a test.
The string representation of the test can be supplied in standard notation or for a subset of types of attributes in Prolog notation.
Following examples for all possible tests that can be represented by this class, given in standard notation.
Examples of tests for numeric attributes:
B >= 2.333
B < 4.56
Examples of tests for nominal attributes with more then 2 values:
A = rain
A != rain
Examples of tests for nominal attribute with exactly 2 values:
A = false
A = true
The Prolog notation is only supplied for numeric attributes and for nominal attributes that have the values "true" and "false".
Following examples for the Prolog notation provided.
Examples of tests for numeric attributes:
The same as for standard notation above.
Examples of tests for nominal attributes with values "true"and "false":
A
not(A)
(Other nominal attributes are not supported by the Prolog notation.)
- Version:
- $Revision: 1.5 $
- Author:
- Gabi Schmidberger (gabi@cs.waikato.ac.nz)
- See Also:
- Serialized Form
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equalTo(Test t)
Compares the test with the test that is given as parameter.Test
getNot()
Negates the test.java.lang.String
getRevision()
Returns the revision string.boolean
passesTest(Instance inst)
Determines whether an instance passes the test.java.lang.String
toPrologString()
Returns the test represented by a string in Prolog notation.java.lang.String
toString()
Returns the test represented by a string.
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Constructor Detail
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Test
public Test(int i, double s, Instances dataset)
Constructor- Parameters:
i
- the attribute indexs
- the splitdataset
- the dataset
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Test
public Test(int i, double s, Instances dataset, boolean n)
Constructor- Parameters:
i
- the attribute indexs
- the splitdataset
- the datasetn
- whether to negate the test
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Method Detail
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getNot
public Test getNot()
Negates the test.- Returns:
- the test itself negated
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passesTest
public boolean passesTest(Instance inst) throws java.lang.Exception
Determines whether an instance passes the test.- Parameters:
inst
- the instance- Returns:
- true if the instance satisfies the test, false otherwise
- Throws:
java.lang.Exception
- if something goes wrong
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toString
public java.lang.String toString()
Returns the test represented by a string.- Overrides:
toString
in classjava.lang.Object
- Returns:
- a string representing the test
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toPrologString
public java.lang.String toPrologString()
Returns the test represented by a string in Prolog notation.- Returns:
- a string representing the test in Prolog notation
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equalTo
public boolean equalTo(Test t)
Compares the test with the test that is given as parameter.- Parameters:
t
- the test the object is compared to- Returns:
- true if the two Tests are equal
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getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Returns:
- the revision
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