public double getInformationFor()
{
string attributeName = specification.getTarget();
IMap <string, int> counts = CollectionFactory.CreateInsertionOrderedMap <string, int>();
foreach (Example e in examples)
{
string val = e.getAttributeValueAsString(attributeName);
if (counts.ContainsKey(val))
{
counts.Put(val, counts.Get(val) + 1);
}
else
{
counts.Put(val, 1);
}
}
double[] data = new double[counts.GetKeys().Size()];
int i = 0;
foreach (int value in counts.GetValues())
{
data[i] = value;
++i;
}
data = Util.normalize(data);
return(Util.information(data));
}
public static Example exampleFromString(string data, DataSetSpecification dataSetSpec, string separator)
{
IRegularExpression splitter = TextFactory.CreateRegularExpression(separator);
IMap <string, IAttribute> attributes = CollectionFactory.CreateInsertionOrderedMap <string, IAttribute>();
ICollection <string> attributeValues = CollectionFactory.CreateQueue <string>(splitter.Split(data));
if (dataSetSpec.isValid(attributeValues))
{
ICollection <string> names = dataSetSpec.getAttributeNames();
int min = names.Size() > attributes.Size() ? names.Size() : attributes.Size();
for (int i = 0; i < min; ++i)
{
string name = names.Get(i);
IAttributeSpecification attributeSpec = dataSetSpec.getAttributeSpecFor(name);
IAttribute attribute = attributeSpec.CreateAttribute(attributeValues.Get(i));
attributes.Put(name, attribute);
}
string targetAttributeName = dataSetSpec.getTarget();
return(new Example(attributes, attributes.Get(targetAttributeName)));
}
else
{
throw new RuntimeException("Unable to construct Example from " + data);
}
}