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.


    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());
    Assert.assertEquals("REL another score",classifier.attributesOfAnInstance[1].name());


    Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(classifier.attributesOfAnInstance[2]));
    Assert.assertTrue(classifier.attributesOfAnInstance[2].isNominal());

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    Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(classifier.attributesOfAnInstance[1]));
    Assert.assertTrue(classifier.attributesOfAnInstance[1].isNominal());
    Assert.assertEquals("REL another score",classifier.attributesOfAnInstance[1].name());


    Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(classifier.attributesOfAnInstance[2]));
    Assert.assertTrue(classifier.attributesOfAnInstance[2].isNominal());
    Assert.assertEquals("conventional score",classifier.attributesOfAnInstance[2].name());


    Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(classifier.attributesOfAnInstance[3]));
    Assert.assertTrue(classifier.attributesOfAnInstance[3].isNominal());

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    Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(classifier.attributesOfAnInstance[2]));
    Assert.assertTrue(classifier.attributesOfAnInstance[2].isNominal());
    Assert.assertEquals("conventional score",classifier.attributesOfAnInstance[2].name());


    Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(classifier.attributesOfAnInstance[3]));
    Assert.assertTrue(classifier.attributesOfAnInstance[3].isNominal());
    Assert.assertEquals("another score",classifier.attributesOfAnInstance[3].name());
  }

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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.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[0]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[0].isNominal());
      Assert.assertEquals("REL statechum score",testClassifier.attributesOfAnInstance[0].name());
  
      Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(testClassifier.attributesOfAnInstance[1]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[1].isNominal());

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      Assert.assertEquals(WekaDataCollector.ZERO,instance.stringValue(testClassifier.attributesOfAnInstance[0]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[0].isNominal());
      Assert.assertEquals("REL statechum score",testClassifier.attributesOfAnInstance[0].name());
  
      Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(testClassifier.attributesOfAnInstance[1]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[1].isNominal());
      Assert.assertEquals("REL statechum compatibility score",testClassifier.attributesOfAnInstance[1].name());
    }
    
    {// pairB - another correct pair

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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.MINUSONE,instance.stringValue(testClassifier.attributesOfAnInstance[0]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[0].isNominal());
      Assert.assertEquals("REL statechum score",testClassifier.attributesOfAnInstance[0].name());
  
      Assert.assertEquals(WekaDataCollector.ONE,instance.stringValue(testClassifier.attributesOfAnInstance[1]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[1].isNominal());

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      Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(testClassifier.attributesOfAnInstance[0]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[0].isNominal());
      Assert.assertEquals("REL statechum score",testClassifier.attributesOfAnInstance[0].name());
  
      Assert.assertEquals(WekaDataCollector.ONE,instance.stringValue(testClassifier.attributesOfAnInstance[1]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[1].isNominal());
      Assert.assertEquals("REL statechum compatibility score",testClassifier.attributesOfAnInstance[1].name());
    }
    
    {// pairC - incorrect pair

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      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(WekaDataCollector.ONE,instance.stringValue(testClassifier.attributesOfAnInstance[0]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[0].isNominal());
      Assert.assertEquals("REL statechum score",testClassifier.attributesOfAnInstance[0].name());
  
      Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(testClassifier.attributesOfAnInstance[1]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[1].isNominal());

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      Assert.assertEquals(WekaDataCollector.ONE,instance.stringValue(testClassifier.attributesOfAnInstance[0]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[0].isNominal());
      Assert.assertEquals("REL statechum score",testClassifier.attributesOfAnInstance[0].name());
  
      Assert.assertEquals(WekaDataCollector.MINUSONE,instance.stringValue(testClassifier.attributesOfAnInstance[1]));
      Assert.assertTrue(testClassifier.attributesOfAnInstance[1].isNominal());
      Assert.assertEquals("REL statechum compatibility score",testClassifier.attributesOfAnInstance[1].name());
    }
    
    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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