OsamaAlRashed / EasyCBR

The easy way to implement CBR (Case Based Reasoning) in C#.

EasyCBR 1.0.4

• The easy way to implement CBR (Case Based Reasoning) in C#.

Documentation

• 4R methods:

  • Retrieve(query case, number of the closest cases that you want): Retrive the closest cases.
  • Reuse(select type): Reuse the one of cases depending on a way.
  • Revise(correct value): Revise the value, you may not pass any value.
  • Retain(): Retain the case.

• Similarity functions:

  • BasicSimilarityFunction
  • LinearSimilarityFunction
  • TableSimilarityFunction
  • CustomSimilarityFunction

Demo

• Prepare your data:

 var laptopList = new List<Laptop>()
 {
    new Laptop("ModelX1", Manufacture.Asus, 4, "I3_G5", false, 200),
    new Laptop("ModelX2", Manufacture.Dell, 4, "I3_G6", false, 220),
    new Laptop("ModelX3", Manufacture.Asus, 4, "I3_G7", false, 250),
    new Laptop("ModelX4", Manufacture.Hp, 8, "I5_G8", false, 300),
    new Laptop("ModelX5", Manufacture.Lenovo, 8, "I5_G8", false, 280),
    new Laptop("ModelX6", Manufacture.Dell, 16, "I5_G11", true, 500),
    new Laptop("ModelX7", Manufacture.Lenovo, 12, "I5_G10", false, 400),
    new Laptop("ModelX8", Manufacture.Hp, 16, "I5_G12", true, 600),
    new Laptop("ModelX9", Manufacture.Lenovo, 32, "I5_G12", true, 650),
    new Laptop("ModelX10", Manufacture.Asus, 16, "I5_G11", true, 450),
 };

• Write a custom similarity function (if you need it):

 Func<string, string, double> cpuSimilarity = (value, queryValue) =>
 {
     double result = 0;
     var values = value.Split('_');
     var queryValues = queryValue.Split('_');
     if (values[0] == queryValues[0])
     {
         result += 0.5;
     }
 
     if (values[1] == queryValues[1])
     {
         result += 0.5;
     }
 
     return result;
 };

• Write a custom table (if you need it):

 Table<Manufacture> _manufactureSimilarity = new()
 {
     [Manufacture.Dell, Manufacture.Hp] = 0.5,
     [Manufacture.Asus, Manufacture.Dell] = 0.5
 };

• Run it:

 var result = CBR<Laptop, decimal>
     .Create(laptopList)
     .Output(order => order.Price)
     .SetSimilarityFunctions
     (
         (nameof(Laptop.Manufacture), new TableSimilarityFunction<Manufacture>(_manufactureSimilarity)),
         (nameof(Laptop.RAM), new LinearSimilarityFunction<int>(4, 32, 2)),
         (nameof(Laptop.SSD), new BasicSimilarityFunction<bool>(2)),
         (nameof(Laptop.CPU), new CustomSimilarityFunction<string>(cpuSimilarity, 4))
     )
     .Retrieve(new Laptop("ModelX", Manufacture.Asus, 32, "I5_G11", true, 0), 3)
     .Reuse(SelectType.AverageValue)
     .Revise()
     .Retain()
     .Run();

• Enjoy ..