public List <int[]> FrequentItemsets_Apriori(double threshold)
{
List <int[]> itemsets = context.Items.Select(s => new int[] { s.Value.Code }).ToList();
List <List <int> > transactions = context.Transactions.Select(t => t.Value.Items).ToList();
return(Apriori.GenerateAllFrecuentItemsets(itemsets, transactions, threshold).ToList());
}
public List <String> FrequentItemSetsByDepartment(String department, double support)
{
List <int[]> itemsets = TransactionsByDepartment(department).SelectMany(t => t.Items).Distinct().Select(s => new int[] { s }).ToList();
List <List <int> > transactions = TransactionsByDepartment(department).Select(t => t.Items).ToList();
var frequent = Apriori.GenerateAllFrecuentItemsets(itemsets, transactions, support).ToList();
return(formatItemSets(frequent));
}
public List <String> FrequentItemSetsByClient(String clientCode, double Support)
{
List <int[]> itemsets = context.Clients[clientCode].Transactions.SelectMany(t => t.Items).Distinct().Select(s => new int[] { s }).ToList();
List <List <int> > transactions = context.Clients[clientCode].Transactions.Select(t => t.Items).ToList();
var frequent = Apriori.GenerateAllFrecuentItemsets(itemsets, transactions, Support).ToList();
return(formatItemSets(frequent));
}
public IEnumerable <String> dependencesbyDepartment(String department, int itemCode, double support)
{
try
{
List <int[]> itemsets = TransactionsByDepartment(department).SelectMany(t => t.Items).Distinct().Select(s => new int[] { s }).ToList();
List <List <int> > transactions = TransactionsByDepartment(department).Select(t => t.Items).ToList();
var frequent = Apriori.GenerateAllFrecuentItemsets(itemsets, transactions, support).ToList();
Rules = new Dictionary <int, List <int[]> >();
AssociatonRule.GenerateAllRules <int>(frequent, Rules);
var y = Rules[itemCode];
return(formatItemSets(y));
}
catch
{
return(null);
}
}
public void generateFrecuentItemsets(double threshold, string region)
{
TimeSpan stop;
TimeSpan start = new TimeSpan(DateTime.Now.Ticks);
if (!region.Equals("TODO"))
{
foreach (int t in Transactions.Keys)
{
if (Clients[Transactions[t].ClientCode].Departament.Equals(region))
{
FilteredTransactions.Add(Transactions[t].Code, Transactions[t]);
}
}
}
else
{
FilteredTransactions = Transactions;
}
if (region.Equals("VALLE DEL CAUCA") || region.Equals("BOGOTA") || region.Equals("CUNDINAMARCA") || region.Equals("RISARALDA") || region.Equals("TODO"))
{
PrunningClientsAndTransactions();
}
else
{
TransactionsPrunned = FilteredTransactions;
}
stop = new TimeSpan(DateTime.Now.Ticks);
Console.WriteLine("Time prunning clients and transactions: " + stop.Subtract(start).TotalSeconds + " segundos");
List <List <int> > transactions = TransactionsPrunned.Select(t => t.Value.Items).ToList();
List <int[]> itemsets = GenerateItemSet_BruteForce(1);
List <int[]> frecuentIS = Apriori.GenerateAllFrecuentItemsets(itemsets, transactions, threshold).ToList();
listadoIF = auxiliarIF(frecuentIS, transactions);
Console.WriteLine("Number of frecuent itemsets: " + frecuentIS.Count);
List <Itemset> FIS = new List <Itemset>();
for (int i = 0; i < frecuentIS.Count; i++)
{
int[] actual = frecuentIS.ElementAt(i);
List <Item> theItems = new List <Item>();
for (int j = 0; j < actual.Length; j++)
{
Item theItem = Items[actual[j]];
theItems.Add(theItem);
}
double averageP = theItems.Average(it => it.AveragePrice);
double averageC = theItems.Average(it => Convert.ToDouble(it.Clasification));
Itemset nuevoItemset = new Itemset(theItems, averageP, averageC);
FIS.Add(nuevoItemset);
}
FrecuentItemsets = FIS;
}