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

namespace Science.Statistics.BasicStatistics
{
    public class Median
    {
        private double median;
        public Median(List<double> data)
        {
            var query   =    from numbers in data //select the numbers
                             orderby numbers ascending
                             select numbers;             
            if (data.Count % 2 == 0)              //we know its even 
            {                
                int element = data.Count / 2; 
                median = (double)((query.ElementAt(element - 1) + query.ElementAt(element))/2);   
            }
            else                                  //we know its odd 
            {                              
                double element = (double)data.Count / 2;
                element = Math.Round(element, MidpointRounding.AwayFromZero);                
                median = (double)query.ElementAt((int)(element - 1)); 
            }            
        }
        public double Value
        {
            get { return median; }
        }
    }
}