Accord.Net_正規化的作法

一個程式Example

reference link:


https://github.com/primaryobjects/Accord.NET/blob/master/Sources/Accord.Statistics/Filters/Normalization.cs


程式碼區塊(修改一些些資料欄位):

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Accord.IO;
using Accord.MachineLearning;
using Accord.Math;
using Accord.Collections;
using Accord.Diagnostics;
using Accord.Controls;
using Accord.Statistics;
using System.Data;  // DataTable
using Accord.Statistics.Filters; // for Normalization
using Accord;

namespace Accord_Normalize_exercise
{
    class Program
    {
        static void Main(string[] args)
        {
            //Normalization Class
            //Create the sample table
            DataTable table = new DataTable("Sample data");
            table.Columns.Add("Age", typeof(double));
            table.Columns.Add("Label", typeof(string));


            //如果我的 年齡 < 20 就是 Child
            //如果我的 年齡 > 20 就是 Adult
            table.Rows.Add(10, "child");
            table.Rows.Add(7, "child");
            table.Rows.Add(5, "child");
            table.Rows.Add(72, "Adult");
            table.Rows.Add(15, "child");            
            table.Rows.Add(21, "Adult");
            table.Rows.Add(23, "Adult");
            table.Rows.Add(9, "child");
            table.Rows.Add(30, "Adult");
            table.Rows.Add(65, "Adult");
            table.Rows.Add(40, "Adult");

            DataGridBox.Show(table);


            Normalization normal = new Normalization(table);

            double mean = normal["Age"].Mean;
            double sdev = normal["Age"].StandardDeviation;

            table.Rows.Add(mean, "平均");
            table.Rows.Add(sdev, "標準差");

            //table.Columns.Add(mean, "平均");


            //做一次 正規化
            DataTable tableAfterNormal = normal.Apply(table);

            DataGridBox.Show(tableAfterNormal);
        }
    }
}

計算標準差部分的程式碼觀察