public CNode FullCopyMe()
{
var newNode = new CNode();
foreach (var item in ElementIDs)
{
newNode.ElementIDs.Add(item);
}
newNode.Support = Support;
return(newNode);
}
private bool CalculateNextStep(float minSupport)
{
var tempList = new List <CNode>();
if (CNodes.First().ElementIDs.Count == 1)
{
for (var i = 0; i < CNodes.Count; i++)
{
for (var k = i + 1; k < CNodes.Count; k++)
{
var newNode = new CNode(CNodes[i].ElementIDs[0]);
newNode.AddElement(CNodes[k].ElementIDs[0]);
newNode.CalculateSupport(Data.Rows);
tempList.Add(newNode);
}
}
}
else
{
foreach (var groups in CNodes.GroupByElements(CNodes.First().ElementIDs.Count - 1))
{
var groupsCount = groups.Count();
for (var i = 0; i < groupsCount - 1; i++)
{
for (var k = i + 1; k < groupsCount; k++)
{
if (k == groupsCount)
{
break;
}
var newNode = groups.ElementAt(i).FullCopyMe();
newNode.AddElement(groups.ElementAt(k).ElementIDs.Last());
newNode.CalculateSupport(Data.Rows);
if (newNode.Support >= minSupport)
{
tempList.Add(newNode);
}
}
}
}
}
if (tempList.Count >= 1)
{
//this.CNodes = CNode.ClearSame(tempList);// => this action deletes last cNode
this.CNodes = tempList;
return(true);
}
return(false);
}
private static List <AssociationRule> GetRules(CNode node, List <List <CNode> > eachLevelOfCNodes)
{
var rules = new List <AssociationRule>();
var subsets = SubSetsOf <int>(node.ElementIDs).OrderBy(x => x.Count()).ToList();
for (int i = 1; i < (subsets.Count / 2); i++)
{
var nodeA = new CNode(subsets[i].ToList());
var nodeB = new CNode(subsets[subsets.Count - i - 1].ToList());
var aFound = eachLevelOfCNodes[nodeA.ElementIDs.Count - 1].FirstOrDefault(x => x.ElementIDs.OrderBy(t => t).SequenceEqual(nodeA.ElementIDs.OrderBy(t => t)));
var bFound = eachLevelOfCNodes[nodeB.ElementIDs.Count - 1].FirstOrDefault(x => x.ElementIDs.OrderBy(t => t).SequenceEqual(nodeB.ElementIDs.OrderBy(t => t)));
if (aFound != null && bFound != null)
{
rules.Add(new AssociationRule(node, aFound, bFound).Calculate());
rules.Add(new AssociationRule(node, bFound, aFound).Calculate());
}
}
return(rules);
}
public AssociationRule(CNode nodeAb, CNode nodeA, CNode nodeB)
{
NodeAB = nodeAb;
NodeA = nodeA;
NodeB = nodeB;
}
