reading value from file and passing it to double dimensional array

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C#

Windows

Win7

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using Accord.MachineLearning;
using Accord.Imaging;
using Accord.Math;
using Accord.Statistics;
using System.Windows.Forms;
using System.IO;

namespace DriverApp
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
         KMeans kmeans = new KMeans(3);
          String line;
            try
            {
                //Pass the file path and file name to the StreamReader constructor
                StreamReader sr = new StreamReader(@"D:\input.txt");

                //Read the first line of text
                line = sr.ReadLine();

                //Continue to read until you reach end of file
                while (line != null)
                {
                    //write the lie to console window
                     
                     int[] medoid =kmeans.Compute(line); // here i am getting error
                   
                    //Read the next line
                    line = sr.ReadLine();
                }

                //close the file
                sr.Close();
                Console.ReadLine();
            }
            catch (Exception e)
            {
                Console.WriteLine("Exception: " + e.Message);
            }
            finally
            {
                Console.WriteLine("Executing finally block.");
            }

        
           
   
           // KMeans kmeans = new KMeans(3);

            // Compute the algorithm, retrieving an integer array
            //  containing the labels for each of the observations
           // int[] medoid = kmeans.Compute(observations);
            
            
           
            // As a result, the first two observations should belong to the
            //  same cluster (thus having the same label). The same should
            //  happen to the next four observations and to the last three.

            Console.Write("The most efficient prediction via K-Means is : ");
            for (int counter = 0; counter < medoid.Length; counter++)
            {
               Console.Write(medoid[counter] + " ");
            }
            Console.WriteLine();
            Console.WriteLine();
            Console.WriteLine();


        }
    }
}

This is the code I am trying to impliment,
Actually I am trying to read values from file and transfer it to k means algorithm, but it oly takes double value,how should I convert string value taken from file to double value required by k means
error i am getting is double[][] had some invalid arguments
please help me out this prob