Click here to Skip to main content
Click here to Skip to main content
Add your own
alternative version

Neural Networks on C#

, 19 Nov 2006
The articles describes a C# library for neural network computations, and their application for several problem solving.
Prize winner in Competition "C# Oct 2006"
neuro_demo.zip
neuro_demo
Back Propagation
Approximation
AForge.Controls.dll
AForge.dll
AForge.Neuro.dll
Approximation.exe
Data Samples
sample1.csv
sample2.csv
TimeSeries
AForge.Controls.dll
AForge.dll
AForge.Neuro.dll
Data Samples
exponent.csv
growing sinusoid.csv
parabola.csv
sigmoid.csv
sinusoid.csv
TimeSeries.exe
XORProblem
AForge.Controls.dll
AForge.dll
AForge.Neuro.dll
XORProblem.exe
Simple
Delta Rule Learning
AForge.Controls.dll
AForge.dll
AForge.Neuro.dll
Classifier.exe
Data Samples
and.csv
cube.csv
or.csv
sample1.csv
sample2.csv
One-Layer Perceptron Classifier
AForge.Controls.dll
AForge.dll
AForge.Neuro.dll
Classifier.exe
Data Samples
sample1.csv
sample2.csv
Perceptron Classifier
AForge.Controls.dll
AForge.dll
AForge.Neuro.dll
Classifier.exe
Data Samples
and.csv
cube.csv
or.csv
SOM
2DOrganizing
2DOrganizing.exe
AForge.dll
AForge.Neuro.dll
Color
AForge.dll
AForge.Neuro.dll
Color.exe
TSP
AForge.Controls.dll
AForge.dll
AForge.Neuro.dll
TSP.exe
neuro_src.zip
neuro_src
Docs
AForge.Core.chm
AForge.Neuro.chm
Release
AForge.Controls.dll
AForge.dll
AForge.Neuro.dll
Samples
Neuro
Back Propagation
Approximation
App.ico
Data Samples
sample1.csv
sample2.csv
TimeSeries
App.ico
Data Samples
exponent.csv
growing sinusoid.csv
parabola.csv
sigmoid.csv
sinusoid.csv
XORProblem
App.ico
Simple
Delta Rule Learning
App.ico
Data Samples
and.csv
cube.csv
or.csv
sample1.csv
sample2.csv
One-Layer Perceptron Classifier
App.ico
Data Samples
sample1.csv
sample2.csv
Perceptron Classifier
App.ico
Data Samples
and.csv
cube.csv
or.csv
SOM
2DOrganizing
App.ico
Color
App.ico
TSP
App.ico
Sources
Controls
Core
Neuro
Activation Functions
Images
sigmoid.bmp
sigmoid_bipolar.bmp
threshold.bmp
Layers
Learning
Networks
Neurons
// AForge Controls Library
//
// Copyright � Andrew Kirillov, 2005-2006
// andrew.kirillov@gmail.com
//

namespace AForge.Controls
{
	using System;
	using System.Collections;
	using System.ComponentModel;
	using System.Drawing;
	using System.Data;
	using System.Windows.Forms;
	using AForge;

	/// <summary>
	/// Chart control
	/// </summary>
	/// 
	/// <remarks>The chart control allows to display multiple charts at time
	/// of different types: dots, lines, connected dots.</remarks>
	/// 
	public class Chart : System.Windows.Forms.Control
	{
		/// <summary>
		/// Chart series type enumeration
		/// </summary>
		public enum SeriesType
		{
			/// <summary>
			/// Line style
			/// </summary>
			Line,
			/// <summary>
			/// Dots style
			/// </summary>
			Dots,
			/// <summary>
			/// Connected dots style
			/// </summary>
			ConnectedDots
		}

		// series data
		private class DataSeries
		{
			public double[,]	data = null;
			public Color		color = Color.Blue;
			public SeriesType	type = SeriesType.Line;
			public int			width = 1;
			public bool			updateYRange = true;
		}

		// data series table
		Hashtable		seriesTable = new Hashtable( );

		private Pen		blackPen = new Pen( Color.Black );
		private Brush	whiteBrush = new SolidBrush( Color.White );

		private DoubleRange	rangeX = new DoubleRange( 0, 1 );
		private DoubleRange	rangeY = new DoubleRange( 0, 1 );

		/// <summary>
		/// Chart's X range
		/// </summary>
		/// 
		/// <remarks>The value sets the X's range of data to be displayed on the chart</remarks>
		/// 
		public DoubleRange RangeX
		{
			get { return rangeX; }
			set
			{
				rangeX = value;
				Invalidate( );
			}
		}

		/// <summary>
		/// Chart's Y range
		/// </summary>
		/// 
		/// <remarks>The value sets the Y's range of data to be displayed on the chart</remarks>
		///
		public DoubleRange RangeY
		{
			get { return rangeY; }
			set
			{
				rangeY = value;
				Invalidate( );
			}
		}

		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		/// <summary>
		/// Initializes a new instance of the <see cref="Chart"/> class
		/// </summary>
		public Chart( )
		{
			// This call is required by the Windows.Forms Form Designer.
			InitializeComponent( );

			// Update control style
			SetStyle( ControlStyles.AllPaintingInWmPaint | ControlStyles.ResizeRedraw |
				ControlStyles.DoubleBuffer | ControlStyles.UserPaint, true );
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if ( disposing )
			{
				if ( components != null )
					components.Dispose();

				// free graphics resources
				blackPen.Dispose( );
				whiteBrush.Dispose( );
			}
			base.Dispose( disposing );
		}

		#region Component Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify 
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			components = new System.ComponentModel.Container();
		}
		#endregion

		/// <summary>
		/// Paint the control with all available data series
		/// </summary>
		/// 
		/// <param name="pe">Data for Paint event</param>
		/// 
		protected override void OnPaint( PaintEventArgs pe )
		{
			Graphics	g = pe.Graphics;
			int			clientWidth = ClientRectangle.Width;
			int			clientHeight = ClientRectangle.Height;

			// fill with white background
			g.FillRectangle( whiteBrush, 0, 0, clientWidth - 1, clientHeight - 1 );

			// draw a black rectangle
			g.DrawRectangle( blackPen, 0, 0, clientWidth - 1, clientHeight - 1 );

			// check if there are any series
			if ( rangeY != null )
			{
				double xFactor = (double)( clientWidth - 10 ) / ( rangeX.Length );
				double yFactor = (double)( clientHeight - 10 ) / ( rangeY.Length );

				// walk through all data series
				IDictionaryEnumerator en = seriesTable.GetEnumerator( );
				while ( en.MoveNext( ) )
				{
					DataSeries series = (DataSeries) en.Value;
					// get data of the series
					double[,] data = series.data;

					// check for available data
					if ( data == null )
						continue;

					// check series type
					if ( series.type == SeriesType.Dots )
					{
						// draw dots
						Brush	brush = new SolidBrush( series.color );
						int		width = series.width;
						int		r = width >> 1;

						// draw all points
						for ( int i = 0, n = data.GetLength( 0 ); i < n; i++ )
						{
							int x = (int) ( ( data[i, 0] - rangeX.Min ) * xFactor );
							int y = (int) ( ( data[i, 1] - rangeY.Min ) * yFactor );

							x += 5;
							y = clientHeight - 6 - y;

							g.FillRectangle( brush, x - r, y - r, width, width );
						}
						brush.Dispose( );
					}
					else if ( series.type == SeriesType.ConnectedDots )
					{
						// draw dots connected with 1-pixel width line
						Brush	brush = new SolidBrush( series.color );
						Pen		pen = new Pen( series.color, 1 );
						int		width = series.width;
						int		r = width >> 1;

						int x1 = (int) ( ( data[0, 0] - rangeX.Min ) * xFactor );
						int y1 = (int) ( ( data[0, 1] - rangeY.Min ) * yFactor );

						x1 += 5;
						y1 = clientHeight - 6 - y1;
						g.FillRectangle( brush, x1 - r, y1 - r, width, width );

						// draw all lines
						for ( int i = 1, n = data.GetLength( 0 ); i < n; i++ )
						{
							int x2 = (int) ( ( data[i, 0] - rangeX.Min ) * xFactor );
							int y2 = (int) ( ( data[i, 1] - rangeY.Min ) * yFactor );

							x2 += 5;
							y2 = clientHeight - 6 - y2;
							g.FillRectangle( brush, x2 - r, y2 - r, width, width );

							g.DrawLine( pen, x1, y1, x2, y2 );

							x1 = x2;
							y1 = y2;
						}

						pen.Dispose( );
						brush.Dispose( );
					}
					else if ( series.type == SeriesType.Line )
					{
						// draw line
						Pen pen = new Pen( series.color, series.width );

						int x1 = (int) ( ( data[0, 0] - rangeX.Min ) * xFactor );
						int y1 = (int) ( ( data[0, 1] - rangeY.Min ) * yFactor );

						x1 += 5;
						y1 = clientHeight - 6 - y1;

						// draw all lines
						for ( int i = 1, n = data.GetLength( 0 ); i < n; i++ )
						{
							int x2 = (int) ( ( data[i, 0] - rangeX.Min ) * xFactor );
							int y2 = (int) ( ( data[i, 1] - rangeY.Min ) * yFactor );

							x2 += 5;
							y2 = clientHeight - 6 - y2;

							g.DrawLine( pen, x1, y1, x2, y2 );

							x1 = x2;
							y1 = y2;
						}
						pen.Dispose( );
					}
				}
			}

			// Calling the base class OnPaint
			base.OnPaint(pe);
		}

		/// <summary>
		/// Add data series to the chart
		/// </summary>
		/// 
		/// <param name="name">Data series name</param>
		/// <param name="color">Data series color</param>
		/// <param name="type">Data series type</param>
		/// <param name="width">Width (depends on the data series type, see remarks)</param>
		/// 
		/// <remarks>Adds new empty data series to the collection of data series. To update this
		/// series the <see cref="UpdateDataSeries"/> method should be used.<br /><br />
		/// The meaning of the width parameter depends on the data series type:
		/// <list type="bullet">
		/// <item><b>Line</b> - width of the line;</item>
		/// <item><b>Dots</b> - size of dots (rectangular dots with specified width and the same height);</item>
		/// <item><b>Connected dots</b> - size of dots (dots are connected with one pixel width line).</item>
		/// </list>
		/// </remarks>
		/// 
		public void AddDataSeries( string name, Color color, SeriesType type, int width )
		{
			AddDataSeries( name, color, type, width, true );
		}

		/// <summary>
		/// Add data series to the chart
		/// </summary>
		/// 
		/// <param name="name">Data series name</param>
		/// <param name="color">Data series color</param>
		/// <param name="type">Data series type</param>
		/// <param name="width">Width (depends on the data series type, see remarks)</param>
		/// <param name="updateYRange">Specifies if <see cref="RangeY"/> should be updated</param>
		/// 
		/// <remarks>Adds new empty data series to the collection of data series. The <b>updateYRange</b>
		/// parameter specifies if the data series can affect displayable Y range.</remarks>
		/// 
		public void AddDataSeries( string name, Color color, SeriesType type, int width, bool updateYRange  )
		{
			// create new series definition ...
			DataSeries	series = new DataSeries( );
			// ... add fill it
			series.color	= color;
			series.type		= type;
			series.width	= width;
			series.updateYRange = updateYRange;
			// add to series table
			seriesTable.Add( name, series );
		}

		/// <summary>
		/// Update data series on the chart
		/// </summary>
		/// 
		/// <param name="name">Data series name to update</param>
		/// <param name="data">Data series values</param>
		/// 
		public void UpdateDataSeries( string name, double[,] data )
		{
			// get data series
			DataSeries	series = (DataSeries) seriesTable[name];
			// update data
			series.data = data;

			// update Y range
			if ( series.updateYRange )
				UpdateYRange( );
			// invalidate the control
			Invalidate( );
		}

		/// <summary>
		/// Remove data series from the chart
		/// </summary>
		/// 
		/// <param name="name">Data series name</param>
		/// 
		public void RemoveDataSeries( string name )
		{
			// remove data series from table
			seriesTable.Remove( name );
			// invalidate the control
			Invalidate( );
		}

		/// <summary>
		/// Remove all data series from the chart
		/// </summary>
		public void RemoveAllDataSeries( )
		{
			// remove all data series from table
			seriesTable.Clear( );
			// invalidate the control
			Invalidate( );
		}

		/// <summary>
		/// displayable Y range
		/// </summary>
		private void UpdateYRange( )
		{
			double	minY = double.MaxValue;
			double	maxY = double.MinValue;

			// walk through all data series
			IDictionaryEnumerator en = seriesTable.GetEnumerator( );
			while ( en.MoveNext( ) )
			{
				DataSeries series = (DataSeries) en.Value;
				// get data of the series
				double[,] data = series.data;

				if ( ( series.updateYRange ) && ( data != null ) )
				{
					for ( int i = 0, n = data.GetLength( 0 ); i < n; i++ )
					{
						double v = data[i, 1];
						// check for max
						if ( v > maxY )
							maxY = v;
						// check for min
						if ( v < minY )
							minY = v;
					}
				}
			}

			// update Y range, if there are any data
			if ( ( minY != double.MaxValue ) || ( maxY != double.MinValue ) )
			{
				rangeY = new DoubleRange( minY, maxY );
			}
		}
	}
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article, along with any associated source code and files, is licensed under The GNU General Public License (GPLv3)

About the Author

Andrew Kirillov
Software Developer (Senior) Cisco Systems
United Kingdom United Kingdom
Started software development at about 15 years old and it seems like now it lasts most part of my life. Fortunately did not spend too much time with Z80 and BK0010 and switched to 8086 and further. Similar with programming languages – luckily managed to get away from BASIC and Pascal to things like Assembler, C, C++ and then C#. Apart from daily programming for food, do it also for hobby, where mostly enjoy areas like Computer Vision, Robotics and AI. This led to some open source stuff like AForge.NET.
 
Going out of computers I am just a man loving his family, enjoying traveling, a bit of books, a bit of movies and a mixture of everything else. Always wanted to learn playing guitar, but it seems like 6 strings are much harder than few dozens of keyboard’s keys. Will keep progressing ...

| Advertise | Privacy | Mobile
Web04 | 2.8.140721.1 | Last Updated 19 Nov 2006
Article Copyright 2006 by Andrew Kirillov
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid