shared_table_data_set(const data_set<Ty,Tx>& rhs)
{
data_vec.resize(rhs.size());
for(int i=0;i<data_vec.size();++i)
{
data_vec[i](rhs.get_data(i));
}
}
float tree::calculate_error(data_set& test_set)
{
float error = 0;
for (data_set::iterator cur_test = test_set.begin(); cur_test != test_set.end(); cur_test++)
{
float ans = calculate_anwser(*cur_test);
error += ((ans - cur_test->anwser) * (ans - cur_test->anwser));
}
error /= (1.0 * test_set.size());
return error;
}