private void button1_Click_2(object sender, EventArgs e)// MRMR Reduce button
{
NRReduce.Enabled = false;
MRMRReduce.Enabled = false;
List <double> Xi = new List <double>();
List <double> Xj = new List <double>();
List <string> RED = new List <string>(), tempRED = new List <string>();
Dictionary <string, double> allNR = new Dictionary <string, double>();// Store the neighbor relevance to decision value of all conditions
string bestRED = "";
string colName = "";
double radius = 0.05;// threshold
long neighborDAmount = 0, neighborAmount = 0;
double NU = 0.0;
double Pos = 0.0;
double tempMrmrValue = 0.0, mrmrValue = 0.0, bestMrmrValue = 0.0;
bool flag = false;
int conditionAmount = 1;// Counting the times do while loop
do
{
for (int curr_col = 0; curr_col <= DV.Table.Columns.Count - 2; ++curr_col)//Except the dicision column
{
Pos = 0.0;
colName = DV.Table.Columns[curr_col].ColumnName;
if (RED.Contains(colName))
{
continue;
}
if (conditionAmount == 1)// Same as Neighbor Reduce
{
// Only computing a single condition
for (int selected_row = 0; selected_row <= DV.Table.Rows.Count - 1; ++selected_row)
{
neighborAmount = neighborDAmount = 0;
retrieveOneRow(Xi, RED, selected_row, curr_col);
for (int contrast_row = 0; contrast_row <= DV.Table.Rows.Count - 1; ++contrast_row)
{
retrieveOneRow(Xj, RED, contrast_row, curr_col);
if (euclidean_distance(Xi, Xj) <= radius * radius)
{// current instance is a neighbor
++neighborAmount;
string decisionValue = DV[contrast_row][DV.Table.Columns.Count - 1].ToString();
if (decisionValue == DV[selected_row][DV.Table.Columns.Count - 1].ToString())// Two rows have same decision value
{
++neighborDAmount;
}
}
}
NU = (neighborDAmount * 1.0) / neighborAmount;
Pos += NU;
}
double tempNR = Pos / DV.Count;
allNR.Add(colName, tempNR); // Collect the NR of all condition
if (tempNR > allNR[tempRED[0]]) // tempRED only have one single element
{
if (tempRED.Count > conditionAmount - 1)
{
tempRED.RemoveAt(tempRED.Count - 1);
} // Drop the rear element of old optimal RED in the previous for(curr_col) loop
tempRED.Add(colName); // 第一个被收录的应该是c7
}
}
//if (conditionAmount > 1)
//{
// tempMrmrValue = MRMR(allNR, tempRED, colName, radius);///////////////////////////////
// if (tempMrmrValue > mrmrValue)
// {
// mrmrValue = tempMrmrValue;
// if (tempRED.Count > conditionAmount - 1)
// { tempRED.RemoveAt(tempRED.Count - 1); }// Drop the last element of previous optimal RED
// tempRED.Add(colName);// Update this RED now
// }
//}
}
RED = tempRED;
if (mrmrValue - bestMrmrValue > 0.001 || conditionAmount == 1)
{
bestMrmrValue = mrmrValue;
copyTo(RED, ref bestRED);
Out.AppendText(bestRED + "\n");
++conditionAmount;
flag = (RED.Count < DV.Table.Columns.Count - 1 ? false : true);// Set true while all conditions are contained in RED
}
else
{
flag = true;
}
} while (flag == false);
Out.AppendText("bestRED: " + bestRED + "\n");
}
private void button1_Click_1(object sender, EventArgs e)// Neighbor Reduce button
{
NRReduce.Enabled = false;
MRMRReduce.Enabled = false;
List <double> Xi = new List <double>();
List <double> Xj = new List <double>();
List <string> RED = new List <string>(), tempRED = new List <string>();
string bestRED = "";
string colName = "";
double radius = 0.01;// threshold
long neighborDAmount = 0;
long neighborAmount = 0;
double NU = 0.0;
double Pos = 0.0;
double NR = 0.0, tempNR = 0.0, bestNR = 0.0;
bool flag = false;
int conditionAmount = 1;// Counting the times do while loop
do
{
for (int curr_col = 0; curr_col <= DV.Table.Columns.Count - 2; ++curr_col)//Except the dicision column
{
Pos = 0.0;
colName = DV.Table.Columns[curr_col].ColumnName;
if (RED.Contains(colName))
{
continue;
}
for (int selected_row = 0; selected_row <= DV.Table.Rows.Count - 1; ++selected_row)
{
neighborAmount = neighborDAmount = 0;
retrieveOneRow(Xi, RED, selected_row, curr_col);
for (int contrast_row = 0; contrast_row <= DV.Table.Rows.Count - 1; ++contrast_row)
{
retrieveOneRow(Xj, RED, contrast_row, curr_col);
if (euclidean_distance(Xi, Xj) <= radius * radius)
{// current instance is a neighbor
++neighborAmount;
string decisionValue = DV[contrast_row][DV.Table.Columns.Count - 1].ToString();
if (decisionValue == DV[selected_row][DV.Table.Columns.Count - 1].ToString())// Two rows have same decision value
{
++neighborDAmount;
}
}
}
NU = (neighborDAmount * 1.0) / neighborAmount;
Pos += NU;
}
tempNR = Pos / DV.Count;
if (tempNR > NR)
{
NR = tempNR;
if (tempRED.Count > conditionAmount - 1)// Make sure save the old optimal RED in the last do while loop
{
tempRED.RemoveAt(tempRED.Count - 1);
} // Drop the rear element of old optimal RED in the previous for(curr_col) loop
tempRED.Add(colName); // Update this RED now
}
}
RED = tempRED;
if (NR - bestNR > 0.001)
{
bestNR = NR;
copyTo(RED, ref bestRED);
Out.AppendText(bestRED + "\n");
++conditionAmount;
flag = (RED.Count < DV.Table.Columns.Count - 1 ? false : true);// Set true while all conditions are contained in RED
}
else
{
flag = true;
}
} while (flag == false);
Out.AppendText("bestRED: " + bestRED + "\n");
}
