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,string separator)
{
// assumed file in data directory and ends in .csv
DataSet ds = new DataSet(spec);
// BufferedReader reader = new BufferedReader(new InputStreamReader(
// this.getClass().getResourceAsStream("../data/" + filename + ".csv")));
// string line;
// while ((line = reader.readLine()) != null)
// {
// ds.add(exampleFromString(line,spec,separator));
// }
return ds;
}
public DataSet fromFile(string filename, DataSetSpecification spec, string separator)
{
// assumed file in data directory and ends in .csv
DataSet ds = new DataSet(spec);
// BufferedReader reader = new BufferedReader(new InputStreamReader(
// this.getClass().getResourceAsStream("../data/" + filename + ".csv")));
// 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, string separator)
{
Hashtable attributes = new Hashtable();
//ArrayList attributeValues = Arrays.asList(data.Split(separator.ToCharArray()[0]));
string[] splitData = data.Split(separator.ToCharArray()[0]);
ArrayList attributeValues = new ArrayList();
foreach (string str in splitData)
{
attributeValues.Add(str);
}
if (dataSetSpec.isValid(attributeValues))
{
ArrayList names = dataSetSpec.getAttributeNames();
IEnumerator nameiter = names.GetEnumerator();
IEnumerator valueiter = attributeValues.GetEnumerator();
while (nameiter.MoveNext() && valueiter.MoveNext())
{
string name = nameiter.Current.ToString();
AttributeSpecification attributeSpec = dataSetSpec.getAttributeSpecFor(name);
Attribute attribute = attributeSpec.createAttribute(valueiter.Current.ToString());
//attributes.put(name,attribute);
if (attributes.Contains(name))
{
attributes[name] = attribute;
}
else
{
attributes.Add(name, attribute);
}
}
string targetAttributeName = dataSetSpec.getTarget();
//AttributeSpecification attributeSpec =dataSetSpec.getAttributeSpecFor(targetAttributeName );
AttributeSpecification _attributeSpec = dataSetSpec.getAttributeSpecFor(targetAttributeName);
return(new Example(attributes, (Attribute)attributes[targetAttributeName]));
}
else
{
throw new Exception("Unable to construct Example from " + data);
}
}
public static Example exampleFromString(string data,DataSetSpecification dataSetSpec,string separator)
{
Hashtable attributes = new Hashtable();
//ArrayList attributeValues = Arrays.asList(data.Split(separator.ToCharArray()[0]));
string[] splitData = data.Split(separator.ToCharArray()[0]);
ArrayList attributeValues = new ArrayList();
foreach (string str in splitData)
{
attributeValues.Add(str);
}
if (dataSetSpec.isValid(attributeValues))
{
ArrayList names = dataSetSpec.getAttributeNames();
IEnumerator nameiter = names.GetEnumerator();
IEnumerator valueiter = attributeValues.GetEnumerator();
while(nameiter.MoveNext() && valueiter.MoveNext())
{
string name = nameiter.Current.ToString();
AttributeSpecification attributeSpec = dataSetSpec.getAttributeSpecFor(name);
Attribute attribute = attributeSpec.createAttribute(valueiter.Current.ToString());
//attributes.put(name,attribute);
if (attributes.Contains(name))
attributes[name] = attribute;
else
attributes.Add(name,attribute);
}
string targetAttributeName = dataSetSpec.getTarget();
//AttributeSpecification attributeSpec =dataSetSpec.getAttributeSpecFor(targetAttributeName );
AttributeSpecification _attributeSpec =dataSetSpec.getAttributeSpecFor(targetAttributeName );
return new Example(attributes,(Attribute)attributes[targetAttributeName]);
}
else
{
throw new Exception("Unable to construct Example from " + data);
}
}
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(DataSetSpecification spec)
{
examples = new ArrayList();
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", spec, ","));
}
public static DataSet getRestaurantDataSet()
{
DataSetSpecification spec = createRestaurantDataSetSpec();
return(new DataSetFactory().fromFile("restaurant", spec, "\\s+"));
}
public DataSet(DataSetSpecification spec)
{
examples = new ArrayList();
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;
}
