tpr-2

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

namespace TPR_2_Console
{
    class Program
    {
        static void Main(string[] args)
        {

            ICollection<Entity> teachingRow = Entity.GenerateEntities(
                new[] { 0, 1, 1, 2, 1, 1, 0, 2, 2, 5, 5, 4, 3, 5, 4, 3, 2, 4, 8, 3 },
                new[] { 1, 0, 1, 2, 3, 2, 0, 1, 3, 1, 3, 3, 6, 5, 4, 5, 7, 6, 1, 7 },
                new[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
                );
            Entity weightVector = new Entity(1,1,1);

            Double alpha = 0.00005;
            Int32 tag = 1, iter = 0, a = 1;
            Int32 resultY;

            while ( tag != 0 )
            {
                tag = 0;
                foreach( Entity e in teachingRow)
                {
                    Console.WriteLine("{0} {1} {2}", weightVector.X, weightVector.Y, weightVector.Class);
                    if( weightVector.X * e.X + weightVector.Y * e.Y <= weightVector.Class)
                    {
                        resultY = 0;
                    }
                    else
                    {
                        resultY = 1;
                    }
                    if ( resultY != e.Class)
                    {
                        ++tag;
                    }
                    else
                    {
                        continue;
                    }
                    switch( a )
                    {
                        case 1:
                            weightVector.X += alpha * e.X * (e.Class - resultY);
                            ++a;
                            break;
                        case 2:
                            weightVector.Y += alpha * e.Y * (e.Class - resultY);
                            ++a;
                            break;
                        case 3:
                            weightVector.Class += alpha * (e.Class - resultY);
                            a = 1;
                            break;
                        default:
                            break;
                    }
                }
                ++iter;
            }
            Console.WriteLine("{0} {1} {2}", weightVector.X, weightVector.Y, weightVector.Class);
            Console.ReadKey();
        }
    }



    public class Entity
    {
        public Double X { get; set; }
        public Double Y { get; set; }
        public Double Class { get; set; }

        public Entity()
        {

        }

        public Entity(Int32 X, Int32 Y, Int32 Class)
        {
            this.X = X;
            this.Y = Y;
            this.Class = Class;
        }

        public static ICollection<Entity> GenerateEntities( Int32[] xArray, Int32[] yArray, Int32[] classArray)
        {
            ICollection<Entity> entities = new List<Entity>();
            for ( int i = 0; i < xArray.Length; ++i)
            {
                entities.Add(new Entity()
                {
                    X = xArray[i],
                    Y = yArray[i],
                    Class = classArray[i]
                });
            }
            return entities;
        }
    }

}