How to iterate over all the attributes in an ExampleSet

radone

How can I iterate over all attributes in an ExampleSet, including special attributes and label?

public class AttributeTest {
	public static void main(String[] args) {
		// construct attribute set
		Attribute[] attributes = new Attribute[3];
		attributes[0] = AttributeFactory.createAttribute(
				"FileName", Ontology.STRING);
		attributes[1] = AttributeFactory.createAttribute(
				"Xposition", Ontology.INTEGER);
		attributes[2] = AttributeFactory.createAttribute(
				"Yposition", Ontology.INTEGER);

		MemoryExampleTable table = new MemoryExampleTable(attributes);
		char decimalSeperator = '.';
		DataRowFactory ROW_FACTORY = new DataRowFactory(0, decimalSeperator);

		String[] strings = new String[3];

		strings[0] = "FILE";
		strings[1] = Integer.toString(11);
		strings[2] = Integer.toString(22);

		// make and add row
		DataRow row = ROW_FACTORY.create(strings, attributes);
		table.addDataRow(row);

		ExampleSet es = table.createExampleSet();

		es.getAttributes().setSpecialAttribute(attributes[0],
				 "IGNORED1");
		es.getAttributes().setSpecialAttribute(attributes[1],
				 "IGNORED2");

		for (Attribute a : es.getAttributes()) {
			System.out.println(a.getName());
		}

		System.out.println(es.getAttributes().getSpecial("clusterFNATT"));
	}
}

With the setSpecial() method I want to mark these attributes to be not used for training.
This code will print only the thirth attribute (which was not made to be special). How can I print also values of the special attributes?

Thanks in advance.
Radim

fischer

Hi,

exampleSet.getAttributes().allAttributes();

returns the iterator you are looking for,

Cheers,
Simon

radone

Thank you again Simon.

For anyone dealing with the problem, let me summarize the content of this thread:

To iterate only over regular attributes:

                       for (Attribute a : ef.getAttributes().allAttributes()) {
				Example e = ef.getExample(0);
				values = e.getValueAsString(a);
				i++;
			}

To iterate over all attributes (including special attributes, label, etc.):

                        Iterator<Attribute> it = ef.getAttributes().allAttributes();
			while(it.hasNext()) {
				Example e = ef.getExample(0);
				values = e.getValueAsString(it.next());
				i++;
			}

where ef is of type ExampleSet.