/// <summary>
/// Reads an arff file and gets all the headers (<see cref="ArffHeader"/>) and instances (<see cref="object[][]"/>).
/// </summary>
/// <param name="arff">Arff file name</param>
private void ReadArff(string arff)
{
Header = null;
Instances = null;
try
{
if (File.Exists(arff))
{
using (ArffReader arffReader = new ArffReader(arff))
{
Header = arffReader.ReadHeader();
Instances = arffReader.ReadAllInstances();
}
}
else
{
throw new FileNotFoundException(string.Format("File \"{0}\" does not exist.", arff), arff);
}
}
catch (Exception e)
{
if (Verbose)
{
throw new Exception(string.Format("Arff file could not be read: {0}\n{1}", e.Message, e.StackTrace), e);
}
else
{
throw new Exception(string.Format("Arff file could not be read: {0}", e.Message), e);
}
}
}
private void AssertReader(string arff, string expectedRelationName = null, ICollection expectedAttributes = null, object[][] expectedInstances = null)
{
ArffReader arffReader = CreateArffReader(arff);
ArffHeader arffHeader = arffReader.ReadHeader();
if (expectedRelationName != null)
{
Assert.AreEqual(expectedRelationName, arffHeader.RelationName, "Unexpected relation name.");
}
if (expectedAttributes != null)
{
CollectionAssert.AreEqual(expectedAttributes, arffHeader.Attributes, "Unexpected attributes.");
}
object[][] instances = arffReader.ReadAllInstances();
if (expectedInstances != null)
{
CollectionAssert.AreEqual(expectedInstances, instances, new InstanceComparer(), "Unexpected instances.");
}
}
private void WriteArffFile(string[] allfiles)
{
using (ArffWriter arffWriter = new ArffWriter(textBox3.Text + ".arff"))
{
bool relation = true;
object[] inst = null;
object[][] insts = new object[allfiles.Length][];
int n = 0;
foreach (string file in allfiles)
{
FileInfo fi = new FileInfo(file);
ArffReader datafile = new ArffReader(file);
ArffHeader header = datafile.ReadHeader();
var instances = datafile.ReadAllInstances();
//var instance = datafile.ReadInstance();
object[] instance = null;
foreach (var ins in instances)
{
instance = ins;
}
if (header != null)
{
var attributes = header.Attributes;
string line;
StreamReader attrfile = new StreamReader("attributes.txt");
int i = 0;
int j = 0;
while ((line = attrfile.ReadLine()) != null)
{
foreach (var attribute in attributes)
{
if (attribute.Name == line)
{
if (relation == true)
{
arffWriter.WriteRelationName(header.RelationName);
relation = false;
}
arffWriter.WriteAttribute(new ArffAttribute(attribute.Name, attribute.Type));
j++;
}
i++;
}
}
inst = new object[j];
j = 0;
i = 0;
while ((line = attrfile.ReadLine()) != null)
{
foreach (var attribute in attributes)
{
if (attribute.Name == line)
{
inst.SetValue(instance.GetValue(i), j);
j++;
}
i++;
}
}
insts.SetValue(inst, n);
attrfile.Close();
}
datafile.Dispose();
n++;
progress++;
}
foreach (var ins in insts)
{
arffWriter.WriteInstance(new object[] { ins });
}
}
}
