/**
* <summary> Constructor for an instance list with a given data definition, data file and a separator character. Each instance
* must be stored in a separate line separated with the character separator. The last item must be the class label.
* The function reads the file line by line and for each line; depending on the data definition, that is, type of
* the attributes, adds discrete and continuous attributes to a new instance. For example, given the data set file
* <p/>
* red;1;0.4;true
* green;-1;0.8;true
* blue;3;1.3;false
* <p/>
* where the first attribute is a discrete attribute, second and third attributes are continuous attributes, the
* fourth item is the class label.</summary>
*
* <param name="definition">Data definition of the data set.</param>
* <param name="separator"> Separator character which separates the attribute values in the data file.</param>
* <param name="fileName"> Name of the data set file.</param>
*/
public InstanceList(DataDefinition definition, string separator, string fileName)
{
_list = new List <Instance.Instance>();
var streamReader = new StreamReader(fileName);
var line = streamReader.ReadLine();
while (line != null)
{
var attributeList = line.Split(separator);
if (attributeList.Length == definition.AttributeCount() + 1)
{
var current = new Instance.Instance(attributeList[attributeList.Length - 1]);
for (var i = 0; i < attributeList.Length - 1; i++)
{
switch (definition.GetAttributeType(i))
{
case AttributeType.DISCRETE:
current.AddAttribute(new DiscreteAttribute(attributeList[i]));
break;
case AttributeType.BINARY:
current.AddAttribute(new BinaryAttribute(bool.Parse(attributeList[i])));
break;
case AttributeType.CONTINUOUS:
current.AddAttribute(new ContinuousAttribute(double.Parse(attributeList[i])));
break;
}
}
_list.Add(current);
}
line = streamReader.ReadLine();
}
}
