private ItemSet AprioriGenerate(ItemSet li, int k, double support)
{
ItemSet curList = null;
ItemSet durList = null;
ItemSet candi = null;
ItemSet result = new ItemSet();
for (int i = 0; i < li.Count; i++)
{
for (int j = 0; j < li.Count; j++)
{
bool flag = true;
curList = (ItemSet)li.arr[i];
durList = (ItemSet)li.arr[j];
for (int n = 2; n < k; n++)
{
if (((DataItem)curList.arr[n - 2]).Id == ((DataItem)durList.arr[n - 2]).Id)
{
flag = true;
}
else
{
flag = false;
break;
}
}
if (flag && ((DataItem)curList.arr[k - 1]).Id < ((DataItem)durList.arr[k - 1]).Id)
{
flag = true;
}
else
{
flag = false;
}
if (flag)
{
candi = new ItemSet();
for (int m = 0; m < k; m++)
{
candi.Add((DataItem)durList.arr[m]);
}
candi.Add((DataItem)curList.arr[k - 1]);
if (HasInFrequentSubset(candi, li, k))
{
candi.Clear();
}
else
{
result.Add(candi);
}
}
}
}
return(result);
}
