static List <List <Item> > Apriori(Database DB, float minSupport, float minConfidence)
{
List <List <Item> > result = new List <List <Item> >();
//Scanning DB once to get frequent 1 - itemsets
result.Add(GetL1FrequentItems(DB, minSupport));
for (int i = 1; result[i - 1].Count != 0; i++)
{
List <Item> candidates = new List <Item>();
candidates = GenerateCandidates(result[i - 1], DB);
List <Item> LiResult = new List <Item>();
foreach (Item item in candidates)
{
if (item.Support >= minSupport)
{
LiResult.Add(item);
}
}
result.Add(LiResult);
}
for (int i = 0; i < result.Count; i++)
{
Console.WriteLine("Frequent transaction of length " + (i + 1));
foreach (var TList in result[i])
{
Console.WriteLine(TList.ToString() + " with support = " + TList.Support);
}
}
return(result);
}
internal static void Main()
{
//// adding element + AutoGrow()
TList<int> somelist = new TList<int>(2);
somelist.Add(1);
somelist.Add(2);
somelist.Add(3);
//// removing element by index
somelist.RemoveAt(1);
//// inserting element at given position
somelist.InsertAt(0, 0);
//// accessing element by index (I feel so sleepy that I dont't see 2)
for (int i = 0; i < somelist.Count; i++)
{
Console.WriteLine(somelist[i]);
}
//// finding element by its value
Console.WriteLine(somelist.Contains(3));
////ToString override
Console.WriteLine(somelist.ToString());
//// Min and max value
int minValue = somelist.Min();
int maxValue = somelist.Max();
Console.WriteLine("MinValue = {0}\nMaxValue = {1}\n", minValue, maxValue);
////Clear list - List is empty & nothing is printed
somelist.Clear();
for (int i = 0; i < somelist.Count; i++)
{
Console.WriteLine(somelist[i]);
}
}