private void train_button(object sender, EventArgs e)
{
string algorithm = comboBox1.Text;
int[] labels = ac.labels;
double[,] tr_docrule = ac.docRule;
ac.Classification_Train(tr_docrule, labels, algorithm);
write_mat(tr_docrule, labels, "train");
////ac.removekeys(100);
//ac = new AR();
//ac.Classification_Train(train_docword, label, algorithm);
}