public frmMain()
{
InitializeComponent();
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
this.MaximizeBox = false;
this.MinimizeBox = false;
trainfile = "customer.txt";
this.lblStatus.Visible = false;
//read information in customer file
string line;
// Read the file and display it line by line.
System.IO.StreamReader file = new System.IO.StreamReader(trainfile);
while ((line = file.ReadLine()) != null)
{
string[] split = line.Split(' ');
Customer cus = new Customer();
cus.setName(split[0]);
cus.setAge(Int32.Parse(split[1]));
cus.setGender(Int32.Parse(split[2]));
cus.setIncoming(Int32.Parse(split[3]));
cus.setNumcard(Int32.Parse(split[4]));
cus.setResponse(Int32.Parse(split[5]));
lCustomer.Add(cus);
counter = counter + 1;
}
file.Close();
this.lblTotal.Text = "/ " + counter;
}
public Normalize( Customer cus, int maxAge, int maxIncome, int maxNumCard )
{
age = (float) cus.getAge() / (float)maxAge;
incoming = (float) cus.getIncoming() / (float)maxIncome;
numCard = (float) cus.getNumcard() / (float)maxNumCard;
}
private void btnOpen_Click(object sender, EventArgs e)
{
OpenFileDialog cFile = new OpenFileDialog();//open file windows
cFile.Filter = "classify customer file|*.txt";//filter only open .txt file
cFile.ShowDialog();
customerfile = cFile.FileName;
this.txtFile.Text = cFile.FileName;//get path file
//read data into unknown customerset
//read information in customer file
string line;
// Read the file and display it line by line.
System.IO.StreamReader file = new System.IO.StreamReader( customerfile );
while ((line = file.ReadLine()) != null)
{
string[] split = line.Split(' ');
Customer cus = new Customer();
cus.setName(split[0]);
cus.setAge(Int32.Parse(split[1]));
cus.setGender(Int32.Parse(split[2]));
cus.setIncoming(Int32.Parse(split[3]));
cus.setNumcard(Int32.Parse(split[4]));
cus.setResponse(-1);
uCustomer.Add(cus);
}
file.Close();
}
private void insertRow(int index, Customer cus)
{
index = index + 1;
string[] row = new string[7];
row[0] = index + "";
row[1] = cus.getName();
row[2] = cus.getAge() + "";
row[3] = cus.getGender() + "";
row[4] = cus.getIncoming() + "";
row[5] = cus.getNumcard() + "";
row[6] = cus.getResponse() + "";
dataGrid.Rows.Add(row);
}
public void setResponse( Customer cus )
{
//normalize cus
Normalize ncus = new Normalize(cus, maxAge, maxIncome, maxNumCard);
//calculate all distances
for (int i = 0; i < this.totalTrainset; i++)
{
distances[i] = new Distance();
distances[i].distance = 0;
distances[i].index = i;
//normalize element
Normalize tmp = new Normalize(this.trainset[i], maxAge, maxIncome, maxNumCard);
//distance between two age normalized
distances[i].distance = distances[i].distance + getDistance( ncus.age , tmp.age);
//distance between two gender
distances[i].distance = distances[i].distance + getDistance(cus.getGender(), this.trainset[i].getGender());
//distance between two incoming normalized
distances[i].distance = distances[i].distance + getDistance(ncus.incoming, tmp.incoming);
//distance between two number of card normalized
distances[i].distance = distances[i].distance + getDistance( ncus.numCard, tmp.numCard);
}// end loop
//sort
for (int i = 0; i < totalTrainset - 1; i++)
{
for (int j = i + 1; j < totalTrainset; j++)
{
if (distances[i].distance > distances[j].distance)
{
Distance tmp = distances[i];
distances[i] = distances[j];
distances[j] = tmp;
}//swap
}//end j loop
}//end i loop
//select k nearest neighbor
int yesCount = 0;
int noCount = 0;
for (int i = 0; i < kNN; i++)
{
Customer tmp = trainset[ distances[i].index ];
if (tmp.getResponse() == 0)
{
noCount = noCount + 1;
}
else if ( tmp.getResponse() == 1 )
{
yesCount = yesCount + 1;
}
}
//set response value for unknown customer
if (yesCount > noCount)
{
cus.setResponse(1);
}
else if (yesCount < noCount)
{
cus.setResponse(0);
}
}