7.   Array Commands
7.1   Creating an Array Project
7.2   Training
7.3   Recognition
7.4   Test Run

7.   Array Commands

In this chapter, we will create a simple project for the shifter problem, which will use Arrays instead of Files. The commands for Arrays are:

public void setN ( int n)
public int getN ( )
public bool train ( char a[] )
public bool retrain ( char a[] )
public long Recognition_classification1N1C(char[] b)
public long Recognition_distribution1N1C (char[] b)
public long polyRecognition_classification1N1C(char[] b)
public long polyRecognition_distribution1N1C (char[] b)
The training commands will be used for both Binary and Polytomous neurons. This following example is also in c:\polyapplet63\chap7\.

The Array commands have one advantage over the File commands of chapter 4 to chapter 6. The multi-valued neurons are of the “char” type, meaning 16 bits. Anything less than or equal to ‘0’ (48) is considered as the ground state and anything above ‘0’ is an excited state. The File commands only take 10 different values: 0, 1, 2, …, 9. The Array commands can take far more than 10 values; and the possible values are ‘0’ (ground state), ‘1’, ‘2’, …, 255.

7.1   Creating an Array Project

1. Create a form and add 5 objects:

Object.Property                   Value
------------------------------------------------
Label1.Text                           "Chap 7  example"
richTextBox1.scrollBars         3 (Both)
button1.Text                           Data
button2.Text                           Train
button3.Text                           Recognition
The Data button will display the data:
Training:
  0  1  0
            1  0  0  0  0  0  0  0  0  0  0  0  0  0  0
            1  0  0  0  0  0  0  0  0  0  0  0  0  0  0
  1  0  0
            0  1  0  0  0  0  0  0  0  0  0  0  0  0  0
            1  0  0  0  0  0  0  0  0  0  0  0  0  0  0
  1  0  0
            0  1  0  0  0  0  0  0  0  0  0  0  0  0  0
            1  0  0  0  0  0  0  0  0  0  0  0  0  0  0
Recognition:
  x  x  x
            0  0  0  0  0  0  0  1  0  0  0  0  1  0  0
            0  0  0  0  0  0  1  0  0  0  0  1  0  0  0
  x  x  x
            0  0  0  0  0  0  1  0  1  0  0  1  0  0  0
            0  0  0  0  0  0  1  0  1  0  0  1  0  0  0
  x  x  x
            0  0  0  0  0  0  1  0  1  0  0  1  0  0  0
            0  0  0  0  0  0  1  0  1  0  0  1  0  0  0


Figure 7.1  Chap 7 Example.

2. Load PolyApplet Class Library:

To use the class library, Attrasoft.PolyApplet63:

(a) Add a “using” statement:
using Attrasoft.PolyApplet63;

(b) In the Solution Explorer, right click References and select Add Reference.
(c) Use the Browse button to find PolyApplet63.dll; Highlight the library under “Selected Components:” and click the OK button.
(d) Run the project.

Now class library, Attrasoft.PolyApplet63, is ready to be used.

3. Add PolyApplet Object to your project:

 First we declare the object,

 public PolyApplet63 x;
Add the following to create the object, x:
public Form1()
  {
  InitializeComponent();
  x = new PolyApplet63 (richTextBox1 );
  }
4. Add Data to the project by declaring the following 6 integer arrays:

char [] trn1 = { '0' , '1' , '0' , '1' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '1' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' };
char [] trn2 = { '1' , '0' , '0' , '0' , '1' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '1' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' };
char [] trn3 = { '0' , '0' , '1' , '1' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '1' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' };

char [] reg1 = { 'x' , 'x' , 'x' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '1' , '0' , '0' , '0' , '0' , '1' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '1' , '0' , '0' , '0' , '0' , '1' , '0' , '0' , '0' };
char [] reg2 = { 'x' , 'x' , 'x' , '0' , '0' , '0' , '0' , '0' , '0' , '1' , '0' , '1' , '0' , '0' , '1' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '1' , '0' , '1' , '0' , '0' , '1' , '0' , '0' , '0' };
char [] reg3 = { 'x' , 'x' , 'x' , '0' , '0' , '0' , '0' , '0' , '0' , '1' , '0' , '1' , '0' , '0' , '1' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '0' , '1' , '0' , '1' , '0' , '0' , '1' , '0' , '0' };

The PolyApplet uses char arrays. The neuron ground state is ‘0’ and the neuron excited states are ‘1’, ‘2’, … This code first assigns the data to trn1, trn2, trn3, reg1, reg2, and reg3. After the assignment, trn1 will be:

0  1  0
            1  0  0  0  0  0  0  0  0  0  0  0  0  0  0
            1  0  0  0  0  0  0  0  0  0  0  0  0  0  0
Remember that the PolyApplet will use characters, not integers; therefore, we must convert an integer 0 into a character ‘0’.

7.2   Training

1. To check the data, click the Data button and enter the code below:

richTextBox1.Text = "Training:\n";
 int i = 0;
 for ( i = 0 ; i < trn1.Length ; i ++ )
  {
  if ( (i == 3) || (i == 18) )
   richTextBox1.AppendText ("\n\t");
  richTextBox1.AppendText ("" + trn1[i] );
 }//for
…

This button will print the 6 arrays.


2. To set up and train the neural net, click the Train button and enter the code below:

private void button2_Click(object sender, System.EventArgs e)
{
richTextBox1.Text = "";
x.setN (33);
x.setSymDimension(3, 32, 30, -1);
x.setSymmetry (1);
x.setLineBreaker(3, 18, -2, -2);

x.train (trn1);
x.retrain (trn2);
x.retrain(trn3);
}

Note: If  you use x.train instead of x.retrain as follows:
    x.train (trn1)
    x.train (trn2)
    x.train (trn3)
then, the second training will overwrite the first training, and the third training will overwrite the second training.

7.3   Recognition

The Recognition commands are:

public long Recognition_classification1N1C(char[] b)
public long Recognition_distribution1N1C (char[] b)
public long polyRecognition_classification1N1C(char[] b)
public long polyRecognition_distribution1N1C (char[] b)
They accept a Recognition Array; for example,
xxx                     000000010000100
                          000000100001000
and convert it into,
100                     000000010000100
                          000000100001000.
They also return the confidence number for the prediction. The computation result is also printed in the default file "example1c.txt".

To add the recognition part to the project, click the Recognition button and enter the code below:

private void button3_Click(object sender, System.EventArgs e)
{

int i;
richTextBox1.Text = "";
long   i1 = x.Recognition_classification1N1C(reg1);
richTextBox1.AppendText ("\n");
long   i2 = x.Recognition_classification1N1C(reg2);
richTextBox1.AppendText ("\n");
long   i3 = x.Recognition_classification1N1C(reg3);
richTextBox1.AppendText ("\n");
 

for ( i = 0 ; i < trn1.Length ; i ++ )
{
if ( (i == 3) || (i == 18) )
richTextBox1.AppendText ("\n\t");
richTextBox1.AppendText ("" + reg1[i] );
}//for
richTextBox1.AppendText ("\t" + i1 + "\n");
reg1[0]=reg1[1]=reg1[2]='x';
…

The 3 statements:
long   i1 = x.Recognition_classification1N1C(reg1);
long   i2 = x.Recognition_classification1N1C(reg2);
long   i3 = x.Recognition_classification1N1C(reg3);
recognize the 3 patterns. Next, the following loop prints the results:
for ( i = 0 ; i < trn1.Length ; i ++ )
{
if ( (i == 3) || (i == 18) )
richTextBox1.AppendText ("\n\t");
richTextBox1.AppendText ("" + reg1[i] );
}//for
richTextBox1.AppendText ("\t" + i1 + "\n");


 At this point, the Recognition-Array

xxx                 000000010000100
                      000000100001000
is converted into the Output-Array
100                 000000010000100
                      000000100001000.
This is no longer a Recognition Array. The next statement,
reg1[0]=reg1[1]=reg1[2]='x';
will convert the Recognized Arrays,
100                 000000010000100
                      000000100001000.
back to the original form,
xxx                 000000010000100
                      000000100001000
so they can be used again.

7.4   Test Run

1. Run the program.

2. Click the Data button to see the data.

3. Click the Train button to train the neural net.

4. Click the Recognition button to identify the 3 recognition buttons.
 
 

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