public static void perfom()
{
//var chi2val = SpecialFunction.chisq(1, 0.5);
//return;
// load file
var infSys = new DecisionSystem();
string filename = @"data/iris.csv";
//string filename = @"data/input1.csv";
StreamReader reader = new StreamReader(filename);
infSys.ConditionAttributes = new int[] { 1, 2, 3, 4 };
infSys.DecisionAttribute = 5;
// Universe
reader.ReadLine(); // ignore header line
List<double?[]> objs = new List<double?[]>();
List<double?> obj;
int idTracker = 0;
Dictionary<int, List<double>> attrDomain = new Dictionary<int,List<double>>();
for(int i = 0; i < 6; i ++)
attrDomain.Add(i, new List<double>());
while (!reader.EndOfStream)
{
string line = reader.ReadLine();
obj = new List<double?>();
obj.Add(++idTracker);
var numbers = line.Split(',')
.Select((x, i) => new {str = x, idx = i})
.Where(o => o.idx < 5)
.Select(t => (double?)Double.Parse(t.str))
.ToList();
obj.AddRange(numbers);
objs.Add(obj.ToArray());
// get value domain of all attrs
// ignore the id (i = 0) of object
for (int i = 1; i < 6; i++) {
if(obj[i] != null && !attrDomain[i].Contains((double)obj[i]) )
attrDomain[i].Add((double)obj[i]);
}
}
infSys.Universe = objs.ToArray();
infSys.AttributesDomain = attrDomain
.OrderBy(p => p.Key)
.Select(p => p.Value.ToArray())
.ToArray();
reader.Close();
printDS(infSys, @"data/inputDS.txt");
// get begin inconsistency rate
var apprSpace = new StandardApproximationSpace(infSys, infSys.ConditionAttributes);
double rate = apprSpace.InConsistencyRate();
// Process data
Chi2Discretizer dis = new Chi2Discretizer(infSys);
dis.Process();
// Get resulted DS
var processedDS = dis.BuildProcessedDS();
printDS(processedDS, @"data/processedDS.txt");
// get rate after processed
var apprSpace2 = new StandardApproximationSpace(processedDS, processedDS.ConditionAttributes);
double rate2 = apprSpace2.InConsistencyRate();
Console.WriteLine(rate2);
// Print report
StreamWriter writer = new StreamWriter(@"data/report.txt", false);
writer.WriteLine("Data file: " + filename);
writer.WriteLine("- Item Count: " + infSys.Universe.Length);
writer.WriteLine("- Original condition attributes: " + string.Join(",", infSys.ConditionAttributes));
writer.WriteLine("- Selected attributes (reduct): " + string.Join(",", dis.SelectedConditionAttrs));
writer.WriteLine("- Original domain count: ");
foreach (int attr in infSys.ConditionAttributes) {
writer.Write(attr + ": ");
writer.WriteLine(infSys.AttributesDomain[attr].Length.ToString());
}
writer.WriteLine("- Processed domain count: ");
foreach (int attr in processedDS.ConditionAttributes)
{
writer.Write(attr + ": ");
writer.WriteLine(processedDS.AttributesDomain[attr].Length.ToString());
}
writer.WriteLine("- Removed attributes: " + string.Join(",", dis.RemovedConditionAttrs));
writer.WriteLine("- Original in-consistency rate: " + rate);
writer.WriteLine("- Processed in-consistency rate: " + rate2);
if (rate2 > 0)
{
var inConClasses = apprSpace2.IndiscernibilityClasses()
.Where(X => ApproximationSpace.GetAllDecisionClasses(X, processedDS.DecisionAttribute).Count() > 1);
writer.WriteLine("- All in-consistent classes:");
int count = 0;
foreach(var klass in inConClasses){
count++;
writer.WriteLine("\t+ Class: " + count);
foreach (var o in klass) {
writer.WriteLine("\t\t" + string.Join(",", o));
}
}
}
writer.Close();
}
// check whether new inconsistency rate will exceed the original rate
private bool WillNextMergedIntervalIncreaseInConsisRate(int targetAttr, List<double> chi2Values)
{
int firstIntervalIdx = chi2Values.IndexOf(chi2Values.Min());
double replacedInterval = this.processedAttrDomains[targetAttr][firstIntervalIdx];
double removedInterval = this.processedAttrDomains[targetAttr][firstIntervalIdx + 1];
var newUniverse = this.crnUniverse.Select(x => (double?[])x.Clone()).ToArray();
for (int i = 0; i < newUniverse.Count(); i++)
{
var newObj = newUniverse[i];
//FIXME: for test
if (newObj[0] == 77)
Console.WriteLine();
if (newObj[targetAttr] == removedInterval)
newObj[targetAttr] = replacedInterval;
}
var newDS = new DecisionSystem(newUniverse.ToArray(), this.SelectedConditionAttrs, this.DS.DecisionAttribute);
var newApprSpace = new StandardApproximationSpace(newDS, this.SelectedConditionAttrs);
var newRate = newApprSpace.InConsistencyRate();
return (newRate > this.Delta);
}
