public void AddNewValue(VectorDefine input)
{
for (int i = 0; i < Item.Count; i++)
{
Item[i] += input.Item[i];
}
}
public double getDistance(VectorDefine input)
{
double tong = 0;
int min = Item.Count > input.Item.Count ? input.Item.Count : Item.Count;
for (int i = 0; i < min; i++)
{
tong += (Item[i] - input.Item[i]) * (Item[i] - input.Item[i]);
}
return Math.Sqrt(tong);
}
public bool EqualWithOtherVector(VectorDefine input)
{
if (Item.Count != input.Item.Count)
{
return false;
}
else
{
for (int i = 0; i < input.Item.Count; i++)
{
if (input.Item[i] != Item[i])
return false;
}
return true;
}
}
/// <summary>
/// ham su ly chinh cua kmean
/// </summary>
/// <param name="k"></param>
public void ProcessKMnean()
{
List<VectorDefine> ListCluster = new List<VectorDefine>();
MarkUp=new int[ListItem.Count];
for (int i = 0; i < ListItem.Count; i++)
{
MarkUp[i] = -1;
}
int step = ListItem.Count / numberCluster;
for (int i = 0; i < ListItem.Count; )
{
ListCluster.Add(ListItem[i]);
i += step;
}
int soLanLap = 0;
bool change = true;
while (change)
{
soLanLap++;
if (soLanLap == 100)
{
break;
}
for (int i = 0; i < ListItem.Count; i++)
{
double minDistance = ListItem[i].getDistance(ListCluster[0]);
int pos=0;
for (int j = 1; j < ListCluster.Count; j++)
{
double tg = ListItem[i].getDistance(ListCluster[j]);
if (tg < minDistance)
{
minDistance = tg;
pos = j;
}
}
MarkUp[i] = pos;
}
//tinh lai toa do tam
change = false;
for (int i = 0; i < ListCluster.Count; i++)
{
VectorDefine OldVector = ListCluster[i];
int dem = 0;
VectorDefine NewVector = new VectorDefine();
for (int j = 0; j < ListItem.Count; j++)
{
if (j == i)
{
dem++;
NewVector.AddNewValue(ListItem[i]);
}
}
NewVector.Average(dem);
if (!NewVector.EqualWithOtherVector(OldVector))
{
change = true;
}
}
}
}
public void ReadDataFromExel(RichTextBox Screen)
{
int total = 0;
DataTable dt;
dt = MoFileExcel.GetDatasetFromExcel(fileName);
total = dt.Rows.Count;
int step = total / 100;
if (step == 0)
step = 1;
if (dt != null)
{
Screen.Text += "Loading data\n";
for (int i = 0; i < dt.Rows.Count;i++ )
{
if((int)i*100/total%step==0)
{
Screen.Text += "█";
SendKeys.Flush();
}
VectorDefine vtTG = new VectorDefine();
for (int j = 0; j < dt.Columns.Count; j++)
{
try
{
vtTG.Item.Add(int.Parse(dt.Rows[i][j].ToString()));
}
catch
{
break;
}
}
ListItem.Add(vtTG);
vtTG = null;
}
Screen.Text += "\n";
}
}
