public double getInformationFor()
{
String attributeName = specification.getTarget();
Dictionary <String, int> counts = new Dictionary <String, int>();
foreach (Example e in examples)
{
String val = e.getAttributeValueAsString(attributeName);
if (counts.ContainsKey(val))
{
counts[val]++;
}
else
{
counts.Add(val, 1);
}
}
double[] data = new double[counts.Keys.Count];
int i = 0;
foreach (string key in counts.Keys)
{
data[i] = counts[key];
i++;
}
data = Util.normalize(data);
return(Util.information(data));
}
public static Example exampleFromString(String data,
DataSetSpecification dataSetSpec, Char separator) {
Dictionary<String, LearningAttribute> attributes = new Dictionary<String, LearningAttribute>();
List<String> attributeValues = new List<String>();
string [] vals = data.Split(new char[] { ' ', '\t', ',' });
foreach (string v in vals)
{
if (!String.IsNullOrWhiteSpace(v))
{
attributeValues.Add(v);
}
}
if (dataSetSpec.isValid(attributeValues)) {
List<String> names = dataSetSpec.getAttributeNames();
List<String>.Enumerator nameiter = names.GetEnumerator();
List<String>.Enumerator valueiter = attributeValues.GetEnumerator();
while (nameiter.MoveNext() && valueiter.MoveNext()) {
String name = nameiter.Current;
AttributeSpecification attributeSpec = dataSetSpec
.getAttributeSpecFor(name);
LearningAttribute attribute = attributeSpec.createAttribute(valueiter.Current);
attributes.Add(name, attribute);
}
String targetAttributeName = dataSetSpec.getTarget();
return new Example(attributes, attributes[targetAttributeName]);
} else {
throw new ApplicationException("Unable to construct Example from "
+ data);
}
}
public static Example exampleFromString(String data,
DataSetSpecification dataSetSpec, Char separator)
{
Dictionary <String, LearningAttribute> attributes = new Dictionary <String, LearningAttribute>();
List <String> attributeValues = new List <String>();
string [] vals = data.Split(new char[] { ' ', '\t', ',' });
foreach (string v in vals)
{
if (!String.IsNullOrWhiteSpace(v))
{
attributeValues.Add(v);
}
}
if (dataSetSpec.isValid(attributeValues))
{
List <String> names = dataSetSpec.getAttributeNames();
List <String> .Enumerator nameiter = names.GetEnumerator();
List <String> .Enumerator valueiter = attributeValues.GetEnumerator();
while (nameiter.MoveNext() && valueiter.MoveNext())
{
String name = nameiter.Current;
AttributeSpecification attributeSpec = dataSetSpec
.getAttributeSpecFor(name);
LearningAttribute attribute = attributeSpec.createAttribute(valueiter.Current);
attributes.Add(name, attribute);
}
String targetAttributeName = dataSetSpec.getTarget();
return(new Example(attributes, attributes[targetAttributeName]));
}
else
{
throw new ApplicationException("Unable to construct Example from "
+ data);
}
}
