F017_GraphUsingChart

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;

namespace F017_GraphUsingChart
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.Text = "Graph Using Chart";

            GraphSetting();
        }

        private void GraphSetting()
        {
            chart1.ChartAreas[0].BackColor = Color.Black;

            //차트영역 x축 y축을 설정 
            chart1.ChartAreas[0].AxisX.Minimum = -20;
            chart1.ChartAreas[0].AxisX.Maximum = 20;
            chart1.ChartAreas[0].AxisX.Interval = 2;
            chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = Color.White;
            chart1.ChartAreas[0].AxisX.MajorGrid.LineDashStyle 
                = ChartDashStyle.Dash;

            chart1.ChartAreas[0].AxisY.Minimum = -2;
            chart1.ChartAreas[0].AxisY.Maximum = 2;
            chart1.ChartAreas[0].AxisY.Interval = 0.5;
            chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = Color.White;
            chart1.ChartAreas[0].AxisY.MajorGrid.LineDashStyle
                = ChartDashStyle.Dash;

            //시리즈 설정
            chart1.Series[0].ChartType = SeriesChartType.Line;
            chart1.Series[0].Color = Color.LightGreen;
            chart1.Series[0].BorderWidth = 2;
            chart1.Series[0].LegendText = "sin(x)/x";

            //시리즈 추가 설정 
            if (chart1.Series.Count == 1)
            {
                chart1.Series.Add("Cos");
                chart1.Series["Cos"].ChartType = SeriesChartType.Line;
                chart1.Series["Cos"].Color = Color.Orange;
                chart1.Series["Cos"].BorderWidth = 2;
                chart1.Series["Cos"].LegendText = "cos(x)/x";
            }
            for(double x = -20; x < 20; x += 0.1)
            {
                double y = Math.Sin(x) / x;
                chart1.Series[0].Points.AddXY(x, y);
                y = Math.Cos(x) / x;
                chart1.Series["Cos"].Points.AddXY(x, y);
            }
        }
    }
}