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 METHODS
//
public FOLDataSetDomain(DataSetSpecification dataSetSpecification,
String trueGoalValue)
{
this.dataSetSpecification = dataSetSpecification;
this.trueGoalValue = trueGoalValue;
constructFOLDomain();
}
public static DataSetSpecification createIrisDataSetSpec()
{
DataSetSpecification dss = new DataSetSpecification();
dss.defineNumericAttribute("sepal_length");
dss.defineNumericAttribute("sepal_width");
dss.defineNumericAttribute("petal_length");
dss.defineNumericAttribute("petal_width");
dss.defineStringAttribute("plant_category", new String[] { "setosa",
"versicolor", "virginica" });
return(dss);
}
public DataSet fromFile(String filename, DataSetSpecification spec,
Char separator) {
// assumed file in data directory and ends in .csv
DataSet ds = new DataSet(spec);
using (StreamReader reader = new StreamReader(typeof(DataSetFactory).Assembly.GetManifestResourceStream("AIMA.Resource." + filename)))
{
String line;
while ((line = reader.ReadLine()) != null)
{
ds.add(exampleFromString(line, spec, separator));
}
}
return ds;
}
public DataSet fromFile(String filename, DataSetSpecification spec,
Char separator)
{
// assumed file in data directory and ends in .csv
DataSet ds = new DataSet(spec);
using (StreamReader reader = new StreamReader(typeof(DataSetFactory).Assembly.GetManifestResourceStream("AIMA.Resource." + filename)))
{
String line;
while ((line = reader.ReadLine()) != null)
{
ds.add(exampleFromString(line, spec, separator));
}
}
return(ds);
}
public static DataSetSpecification createRestaurantDataSetSpec() {
DataSetSpecification dss = new DataSetSpecification();
dss.defineStringAttribute("alternate", Util.yesno());
dss.defineStringAttribute("bar", Util.yesno());
dss.defineStringAttribute("fri/sat", Util.yesno());
dss.defineStringAttribute("hungry", Util.yesno());
dss.defineStringAttribute("patrons", new String[] { "None", "Some",
"Full" });
dss.defineStringAttribute("price", new String[] { "$", "$$", "$$$" });
dss.defineStringAttribute("raining", Util.yesno());
dss.defineStringAttribute("reservation", Util.yesno());
dss.defineStringAttribute("type", new String[] { "French", "Italian",
"Thai", "Burger" });
dss.defineStringAttribute("wait_estimate", new String[] { "0-10",
"10-30", "30-60", ">60" });
dss.defineStringAttribute("will_wait", Util.yesno());
// last attribute is the target attribute unless the target is
// explicitly reset with dss.setTarget(name)
return dss;
}
public static DataSetSpecification createRestaurantDataSetSpec()
{
DataSetSpecification dss = new DataSetSpecification();
dss.defineStringAttribute("alternate", Util.yesno());
dss.defineStringAttribute("bar", Util.yesno());
dss.defineStringAttribute("fri/sat", Util.yesno());
dss.defineStringAttribute("hungry", Util.yesno());
dss.defineStringAttribute("patrons", new String[] { "None", "Some",
"Full" });
dss.defineStringAttribute("price", new String[] { "$", "$$", "$$$" });
dss.defineStringAttribute("raining", Util.yesno());
dss.defineStringAttribute("reservation", Util.yesno());
dss.defineStringAttribute("type", new String[] { "French", "Italian",
"Thai", "Burger" });
dss.defineStringAttribute("wait_estimate", new String[] { "0-10",
"10-30", "30-60", ">60" });
dss.defineStringAttribute("will_wait", Util.yesno());
// last attribute is the target attribute unless the target is
// explicitly reset with dss.setTarget(name)
return(dss);
}
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 DataSet(DataSetSpecification spec)
{
examples = new List<Example>();
this.specification = spec;
}
/**
* @param specification
* The specification to set. USE SPARINGLY for testing etc ..
* makes no semantic sense
*/
public void setSpecification(DataSetSpecification specification)
{
this.specification = specification;
}
public DataSet(DataSetSpecification spec)
{
examples = new List <Example>();
this.specification = spec;
}
/**
* @param specification
* The specification to set. USE SPARINGLY for testing etc ..
* makes no semantic sense
*/
public void setSpecification(DataSetSpecification specification)
{
this.specification = specification;
}
public static DataSet getIrisDataSet()
{
DataSetSpecification spec = createIrisDataSetSpec();
return(new DataSetFactory().fromFile("iris.csv", spec, ','));
}
public static DataSet getRestaurantDataSet()
{
DataSetSpecification spec = createRestaurantDataSetSpec();
return(new DataSetFactory().fromFile("restaurant.csv", spec, '\t'));
}
public static DataSetSpecification createIrisDataSetSpec() {
DataSetSpecification dss = new DataSetSpecification();
dss.defineNumericAttribute("sepal_length");
dss.defineNumericAttribute("sepal_width");
dss.defineNumericAttribute("petal_length");
dss.defineNumericAttribute("petal_width");
dss.defineStringAttribute("plant_category", new String[] { "setosa",
"versicolor", "virginica" });
return dss;
}