public Apriori(DataFields data)
{
if (data == null)
{
throw new Exception("Apriori object can not be created with null DataFields");
}
Data = data;
}
public void Apriori_Big()
{
var csvFilePath = @"..\..\..\..\..\data\csv\big-text-1.csv";
var dataFields = DataFields.ReadFromCsv(csvFilePath);
var myApriori = new Apriori(dataFields);
myApriori.CalculateCNodes(0.003f);
myApriori.Rules.Count.ShouldBeGreaterThan(0);
_testOutputHelper.WriteLine("Top rules ordered by Confidence (Up to 10)");
foreach (var associationRule in myApriori.Rules.OrderByDescending(x => x.Confidence).Take(10))
{
_testOutputHelper.WriteLine(associationRule.ToDetailedString(dataFields));
}
}
public void Apriori_Market_Basket_One()
{
var dataFields = DataFields.ReadFromCsv(@"..\..\..\..\..\data\csv\small-market-basket.csv");
var myApriori = new Apriori(dataFields);
myApriori.CalculateCNodes(.4f);
myApriori.Rules.ShouldNotBeNull();
myApriori.Rules.Count.ShouldNotBe(0);
myApriori.Rules.Count(x => x.Confidence >= .7f).ShouldBe(12);
_testOutputHelper.WriteLine("Top rules ordered by Confidence (Up to 10)");
foreach (var associationRule in myApriori.Rules.OrderByDescending(x => x.Confidence).Take(10))
{
_testOutputHelper.WriteLine(associationRule.ToDetailedString(dataFields));
}
}
public string ToDetailedString(DataFields dataFields)
{
return(NodeA.ToDetailedString(dataFields) + " => " + NodeB.ToDetailedString(dataFields) + " || " + GetCalculationsAsString());
}
public string ToDetailedString(DataFields dataFields)
{
return(string.Join(", ", dataFields.GetElementsName(ElementIDs)));
}
public void Apriori_One()
{
var transaction1 = new List <int>()
{
0, 1, 2, 3
};
var transaction2 = new List <int>()
{
0, 2, 3, 4, 5, 6
};
var transaction3 = new List <int>()
{
1, 4, 5, 7
};
var transaction4 = new List <int>()
{
0, 1, 4, 5
};
var transaction5 = new List <int>()
{
0, 1, 2, 5, 7
};
var transaction6 = new List <int>()
{
0, 1, 3, 4, 5
};
var transaction7 = new List <int>()
{
0, 1, 5, 7
};
var transactions = new List <List <int> >()
{
transaction1,
transaction2,
transaction3,
transaction4,
transaction5,
transaction6,
transaction7
};
var maxCol = transactions.Max(x => x.Max());
var dataFields = new DataFields(maxCol, transactions);
var myApriori = new Apriori(dataFields);
var minimumSupport = 0.4f; // %40 Minimum Support
myApriori.CalculateCNodes(minimumSupport);
myApriori.Rules.ShouldNotBeNull();
myApriori.Rules.Count.ShouldNotBe(0);
myApriori.Rules.Count(x => x.Confidence >= .7f).ShouldBe(12);
_testOutputHelper.WriteLine("Top rules ordered by Confidence (Up to 10)");
foreach (var associationRule in myApriori.Rules.OrderByDescending(x => x.Confidence).Take(10))
{
_testOutputHelper.WriteLine(associationRule.ToDetailedString(dataFields));
}
}