Examples of weka.core.Instance.stringValue()

weka.core.Instance.stringValue()
Returns the value of a nominal, string, date, or relational attribute for the instance as a string. @param attIndex the attribute's index @return the value as a string @throws IllegalArgumentException if the attribute is not a nominal,string, date, or relation-valued attribute. @throws UnassignedDatasetException if the instance doesn't belongto a dataset.

    }
    
    {// pairE - incorrect pair, compared only with D
      Instance instance = instEnum.nextElement();
      Assert.assertEquals("false",instance.classAttribute().value((int) instance.value(instance.classAttribute())));
      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[0]));
      Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(testClassifier.attributesOfAnInstance[1]));


      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[2]));
      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[3]));// this should perhaps return ONE but we are effectively comparing floating-point values by equality so the outcome is not ceertain  
    }

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    {// pairE - incorrect pair, compared only with D
      Instance instance = instEnum.nextElement();
      Assert.assertEquals("false",instance.classAttribute().value((int) instance.value(instance.classAttribute())));
      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[0]));
      Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(testClassifier.attributesOfAnInstance[1]));


      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[2]));
      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[3]));// this should perhaps return ONE but we are effectively comparing floating-point values by equality so the outcome is not ceertain  
    }

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      Instance instance = instEnum.nextElement();
      Assert.assertEquals("false",instance.classAttribute().value((int) instance.value(instance.classAttribute())));
      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[0]));
      Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(testClassifier.attributesOfAnInstance[1]));


      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[2]));
      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[3]));// this should perhaps return ONE but we are effectively comparing floating-point values by equality so the outcome is not ceertain  
    }
    
    Assert.assertFalse(instEnum.hasMoreElements());
  }

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      Assert.assertEquals("false",instance.classAttribute().value((int) instance.value(instance.classAttribute())));
      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[0]));
      Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(testClassifier.attributesOfAnInstance[1]));


      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[2]));
      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[3]));// this should perhaps return ONE but we are effectively comparing floating-point values by equality so the outcome is not ceertain  
    }
    
    Assert.assertFalse(instEnum.hasMoreElements());
  }

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    Assert.assertFalse(instance.classIsMissing());Assert.assertEquals(1,instance.numValues());
    Assert.assertFalse(instance.hasMissingValue());
    Assert.assertTrue(instance.classAttribute().isNominal());
    Assert.assertEquals(2,instance.classAttribute().numValues());// true/false
    Assert.assertEquals("false",instance.classAttribute().value((int) instance.value(instance.classAttribute())));
    Assert.assertEquals("false",instance.stringValue(instance.classAttribute()));
  }
  
  /** Construction of instances. */
  @Test
  public void testConstructEmptyInstance2a()

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    Assert.assertFalse(instance.classIsMissing());Assert.assertEquals(3,instance.numValues());
    Assert.assertFalse(instance.hasMissingValue());
    Assert.assertTrue(instance.classAttribute().isNominal());
    Assert.assertEquals(2,instance.classAttribute().numValues());// true/false
    Assert.assertEquals("true",instance.classAttribute().value((int) instance.value(instance.classAttribute())));
    Assert.assertEquals(WekaDataCollector.ONE,instance.stringValue(classifier.attributesOfAnInstance[0]));
    Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(classifier.attributesOfAnInstance[1]));
  }


  /** Construction of instances. Same as TestCreateInstances2 but initialises with zero max number of values in the training set. */
  @Test

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    Assert.assertFalse(instance.hasMissingValue());
    Assert.assertTrue(instance.classAttribute().isNominal());
    Assert.assertEquals(2,instance.classAttribute().numValues());// true/false
    Assert.assertEquals("true",instance.classAttribute().value((int) instance.value(instance.classAttribute())));
    Assert.assertEquals(WekaDataCollector.ONE,instance.stringValue(classifier.attributesOfAnInstance[0]));
    Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(classifier.attributesOfAnInstance[1]));
  }


  /** Construction of instances. Same as TestCreateInstances2 but initialises with zero max number of values in the training set. */
  @Test
  public void TestCreateInstances3()

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    Assert.assertFalse(instance.hasMissingValue());
    Assert.assertTrue(instance.classAttribute().isNominal());
    Assert.assertEquals(2,instance.classAttribute().numValues());// true/false
    Assert.assertEquals("true",instance.classAttribute().value((int) instance.value(instance.classAttribute())));


    Assert.assertEquals(WekaDataCollector.ONE,instance.stringValue(classifier.attributesOfAnInstance[0]));
    Assert.assertTrue(classifier.attributesOfAnInstance[0].isNominal());
    Assert.assertEquals("REL conventional score",classifier.attributesOfAnInstance[0].name());


    Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(classifier.attributesOfAnInstance[1]));
    Assert.assertTrue(classifier.attributesOfAnInstance[1].isNominal());

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    Assert.assertEquals(WekaDataCollector.ONE,instance.stringValue(classifier.attributesOfAnInstance[0]));
    Assert.assertTrue(classifier.attributesOfAnInstance[0].isNominal());
    Assert.assertEquals("REL conventional score",classifier.attributesOfAnInstance[0].name());


    Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(classifier.attributesOfAnInstance[1]));
    Assert.assertTrue(classifier.attributesOfAnInstance[1].isNominal());
    Assert.assertEquals("conventional score",classifier.attributesOfAnInstance[1].name());
  }
  
  /** Construction of instances. Invalid value for an attribute. */

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    Assert.assertFalse(instance.hasMissingValue());
    Assert.assertTrue(instance.classAttribute().isNominal());
    Assert.assertEquals(2,instance.classAttribute().numValues());// true/false
    Assert.assertEquals("true",instance.classAttribute().value((int) instance.value(instance.classAttribute())));


    Assert.assertEquals(WekaDataCollector.ONE,instance.stringValue(classifier.attributesOfAnInstance[0]));
    Assert.assertTrue(classifier.attributesOfAnInstance[0].isNominal());
    Assert.assertEquals("REL conventional score",classifier.attributesOfAnInstance[0].name());


    Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(classifier.attributesOfAnInstance[1]));
    Assert.assertTrue(classifier.attributesOfAnInstance[1].isNominal());

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