Brilliant.ArtificialNeuralNetworks.Perceptrons.PerceptronLeaningAlgori..., C#

Brilliant.ArtificialNeuralNetworks.Perceptrons.PerceptronLeaningAlgori...

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        private class WnB
        {
            private static int s_Id;
            public int[] W { get; set; }
            public int B { get; set; }
            public int Id { get; private set;}
            public WnB()
            {
                Id = s_Id++;
            }
            public override string ToString()
            {
                return "[" + Id + "] " + "W={" + string.Join(",", W.Select(v => v.ToString())) + "}, B=" + B;
            }

public int Total
            {
                get { return B + W.Aggregate(0, (a, v) => a + v); }
            }
        }

private class Datum
        {
            public int[] X { get; set; }
            public int Y { get; set; }

public bool Test(WnB wnb)
            {
                return Y * (Multi(wnb.W, X) + wnb.B) > 0;
            }

public override string ToString()
            {
                return "X={" + string.Join(",", X.Select(v => v.ToString())) + "}, Y=" + Y;
            }
        }

public static void Main(string[] args)
        {
            var data = new[]
            {
                new Datum {X = new[] {-1, 1}, Y = 1},
                new Datum {X = new[] {0, -1}, Y = -1},
                new Datum {X = new[] {10, 1}, Y = 1}
            };
            WnB wnb;
            int i=1;
            for (wnb = new WnB {W = new[] {0, 0}, B = 0};
                data.Any(datum => !datum.Test(wnb));
                wnb = data.Aggregate(
                    wnb,
                    (curWnB, datum) =>
                    {
                        var nextWnB = datum.Test(curWnB)
                            ? curWnB
                            : new WnB {W = Add(curWnB.W, Multy(datum.Y, datum.X)), B = curWnB.B + datum.Y};
                        Console.WriteLine(datum + " begets " + nextWnB);
                        return nextWnB;
                    }))
            {
                Console.WriteLine("Round #" + i++);
            }
            Console.WriteLine("Total=" + wnb.Total);
        }

private static int[] Add(int[] a, int[] b)
        {
            return a.Zip(b, (x, y) => x + y).ToArray();
        }

private static int[] Multy(int a, int[] b)
        {
            return b.Select(v => v * a).ToArray();
        }

private static int Multi(int[] a, int[] b)
        {
            return a.Zip(b, (x, y) => x * y).Sum();
        }
    }
}


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