public function createBaseline()
    {
        set_time_limit(0);
        $path2 = "C:/Users/fabio/Documents/baseline/baseline da validare2.csv";
        $myfile2 = fopen($path2, 'w') or die("Unable to open file!");
        // 		$classes = array("study_group","tvl", "spam", "need_help", "give_exam_info", "need_exam_info");
        $classes = array("study_group", "give_exam_info", "spam");
        foreach ($classes as $c) {
            $path = "C:/Users/fabio/Documents/baseline/" . $c . ".txt";
            $myfile = fopen($path, 'r') or die("Unable to open file!");
            // 		echo fread($myfile,filesize("webdictionary.txt"));
            $i = 1;
            $line = fgets($myfile);
            $count_type = 0;
            while (!feof($myfile) && $count_type <= 100) {
                // 				$criteria_type = new CDbCriteria;
                // 				$criteria_type->condition = " post_type =".$c;
                // 				$n_type = PreProcPost::model()->findAllByAttributes(array("post_type" => $c));
                $line = fgets($myfile);
                $line = str_replace(";", " ", $line);
                $line = explode(" ", $line);
                var_dump($line);
                ?>
 <br><?php 
                if (isset($line[0])) {
                    $criteria = new CDbCriteria();
                    $criteria->condition = " post_type ='null' and message like '%" . $line[0] . "%' order by rand() limit 15";
                    $posts = PreProcPost::model()->findAll($criteria);
                    $count_type += count($posts);
                    foreach ($posts as $p) {
                        $p->post_type = $c;
                        echo $p->fbpid . " " . $c . " " . $line[0];
                        ?>
 <br><?php 
                        $post = FbPost::model()->findByPk($p->fbpid);
                        $message = str_replace("\n", " ", $post->message);
                        $message = str_replace(";", " ", $message);
                        $txt = $post->fbpid . ";" . $message . "\n";
                        fwrite($myfile2, $txt);
                        // 						$p->save();
                    }
                }
            }
            fclose($myfile);
        }
        fclose($myfile2);
    }
 public function ActionKld()
 {
     $categories = array("need_help", "tvl", "spam", "give_exam_info", "need_exam_info", "study_group");
     $categories_words = array();
     $single_words = array("need_help" => array(), "tvl" => array(), "spam" => array(), "give_exam_info" => array(), "need_Exam_info" => array(), "study_group" => array());
     $word = array();
     $vocabulary = array();
     $add = 1;
     $i = 0;
     foreach ($categories as $c) {
         // 			if($c =="need_help"){
         // 				$posts1 = PreProcPost::model()->findAllByAttributes(array("post_type" => $c),array("limit" => "10"));
         // 				$posts2 = PreProcPost::model()->findAllByAttributes(array("post_type" => "need_exam_info"), array("limit" => "10"));
         // 				$posts = array_merge($posts1, $posts2);
         // 			}
         $posts = PreProcPost::model()->findAllByAttributes(array("post_type" => $c));
         $categories_words[$c] = "";
         foreach ($posts as $p) {
             $categories_words[$c] = $categories_words[$c] . $p->message . " ";
         }
         $categories_words[$c] = str_replace("?", "", $categories_words[$c]);
         $categories_words[$c] = trim($categories_words[$c]);
         $tmp = explode(" ", $categories_words[$c]);
         $word[$tmp[0]] = 0;
         $single_words[$c][$tmp[0]]["in_oc"] = 0;
         foreach ($tmp as $t) {
             if (!array_key_exists($t, $vocabulary)) {
                 $vocabulary[$t] = true;
             }
             if (isset($single_words[$c][$t])) {
                 $single_words[$c][$t]["in_oc"] = $single_words[$c][$t]["in_oc"] + 1;
             } else {
                 $single_words[$c][$t]["in_oc"] = 1;
             }
         }
     }
     foreach (array_keys($vocabulary) as $t) {
         foreach ($categories as $c) {
             if (array_key_exists($t, $single_words[$c])) {
                 foreach ($single_words as $sw) {
                     if (array_diff_key($sw, $single_words[$c]) != null) {
                         if (!isset($single_words[$c][$t]["other_oc"])) {
                             $single_words[$c][$t]["other_oc"] = 0;
                         }
                         if (array_key_exists($t, $sw)) {
                             $single_words[$c][$t]["other_oc"] = $single_words[$c][$t]["other_oc"] + $sw[$t]["in_oc"];
                         }
                     }
                 }
             }
         }
     }
     $tot = 0;
     foreach ($categories as $c) {
         foreach ($single_words[$c] as $sw) {
             $tot = $tot + $sw["in_oc"];
         }
         $single_words[$c]["n_tot"] = $tot;
         $tot = 0;
     }
     foreach ($categories as $c) {
         foreach (array_keys($single_words[$c]) as $sw) {
             if ($sw != "n_tot") {
                 $prior_probability = ($single_words[$c][$sw]["in_oc"] + 1) / ($single_words[$c]["n_tot"] + count($vocabulary));
                 $single_words[$c][$sw]["prior_prob"] = round($prior_probability, 5);
             }
         }
     }
     //complementary probability
     $total_occurrence = 0;
     foreach ($categories as $c) {
         $total_occurrence = $total_occurrence + $single_words[$c]["n_tot"];
     }
     foreach ($categories as $c) {
         $single_words[$c]["other_tot"] = $total_occurrence - $single_words[$c]["n_tot"];
     }
     foreach ($categories as $c) {
         foreach (array_keys($single_words[$c]) as $sw) {
             if ($sw != "n_tot" && $sw != "other_tot") {
                 $complementary_probability = ($single_words[$c][$sw]["other_oc"] + 1) / ($single_words[$c]["other_tot"] + count($vocabulary));
                 $single_words[$c][$sw]["complementary_prob"] = round($complementary_probability, 5);
             }
         }
     }
     //KLD
     foreach ($categories as $c) {
         foreach (array_keys($single_words[$c]) as $sw) {
             if ($sw != "n_tot" && $sw != "other_tot") {
                 $rapporto = $single_words[$c][$sw]["prior_prob"] / $single_words[$c][$sw]["complementary_prob"];
                 $kld = $single_words[$c][$sw]["prior_prob"] * log($rapporto);
                 $single_words[$c][$sw]["kld"] = round($kld, 5);
             }
         }
     }
     $study_group = array();
     $tvl = array();
     $spam = array();
     $need_exam_info = array();
     $need_help = array();
     $give_exam_info = array();
     foreach (array_keys($single_words["tvl"]) as $sw) {
         $tvl[$sw] = $single_words["tvl"][$sw]["kld"];
     }
     foreach (array_keys($single_words["spam"]) as $sw) {
         $spam[$sw] = $single_words["spam"][$sw]["kld"];
     }
     foreach (array_keys($single_words["need_exam_info"]) as $sw) {
         $need_exam_info[$sw] = $single_words["need_exam_info"][$sw]["kld"];
     }
     foreach (array_keys($single_words["need_help"]) as $sw) {
         $need_help[$sw] = $single_words["need_help"][$sw]["kld"];
     }
     foreach (array_keys($single_words["give_exam_info"]) as $sw) {
         $give_exam_info[$sw] = $single_words["give_exam_info"][$sw]["kld"];
     }
     foreach (array_keys($single_words["study_group"]) as $sw) {
         $study_group[$sw] = $single_words["study_group"][$sw]["kld"];
     }
     arsort($tvl);
     arsort($spam);
     arsort($give_exam_info);
     arsort($need_exam_info);
     arsort($need_help);
     arsort($study_group);
     // 		 var_dump($tvl);
     // write tvl
     $myfile = fopen('C:\\Users\\fabio\\Google Drive\\TESI - Q&A SL\\TESI 2.0\\Classificazione\\KLD - keys\\6 classi\\tvl keys 6.csv', 'w') or die("Unable to open file!");
     fwrite($myfile, "");
     fwrite($myfile, "WORD; KLD - Value\n");
     foreach (array_keys($tvl) as $key) {
         $text = $key . ";" . $tvl[$key] . "\n";
         fwrite($myfile, $text);
     }
     fclose($myfile);
     // write need_help
     $myfile = fopen('C:\\Users\\fabio\\Google Drive\\TESI - Q&A SL\\TESI 2.0\\Classificazione\\KLD - keys\\6 classi\\need_help keys 6.csv', 'w') or die("Unable to open file!");
     fwrite($myfile, "");
     fwrite($myfile, "WORD; KLD - Value\n");
     foreach (array_keys($need_help) as $key) {
         $text = $key . ";" . $need_help[$key] . "\n";
         fwrite($myfile, $text);
     }
     fclose($myfile);
     // write need_exam_info
     $myfile = fopen('C:\\Users\\fabio\\Google Drive\\TESI - Q&A SL\\TESI 2.0\\Classificazione\\KLD - keys\\6 classi\\need_exam_info keys 6.csv', 'w') or die("Unable to open file!");
     fwrite($myfile, "");
     fwrite($myfile, "WORD; KLD - Value\n");
     foreach (array_keys($need_exam_info) as $key) {
         $text = $key . ";" . $need_exam_info[$key] . "\n";
         fwrite($myfile, $text);
     }
     fclose($myfile);
     // write study_group
     $myfile = fopen('C:\\Users\\fabio\\Google Drive\\TESI - Q&A SL\\TESI 2.0\\Classificazione\\KLD - keys\\6 classi\\study_group keys 6.csv', 'w') or die("Unable to open file!");
     fwrite($myfile, "");
     fwrite($myfile, "WORD; KLD - Value\n");
     foreach (array_keys($study_group) as $key) {
         $text = $key . ";" . $study_group[$key] . "\n";
         fwrite($myfile, $text);
     }
     fclose($myfile);
     // write spam
     $myfile = fopen('C:\\Users\\fabio\\Google Drive\\TESI - Q&A SL\\TESI 2.0\\Classificazione\\KLD - keys\\6 classi\\spam keys 6.csv', 'w') or die("Unable to open file!");
     fwrite($myfile, "");
     fwrite($myfile, "WORD; KLD - Value\n");
     foreach (array_keys($spam) as $key) {
         $text = $key . ";" . $spam[$key] . "\n";
         fwrite($myfile, $text);
     }
     fclose($myfile);
     // write give_exam_info
     $myfile = fopen('C:\\Users\\fabio\\Google Drive\\TESI - Q&A SL\\TESI 2.0\\Classificazione\\KLD - keys\\6 classi\\give_exam_info keys 6.csv', 'w') or die("Unable to open file!");
     fwrite($myfile, "");
     fwrite($myfile, "WORD; KLD - Value\n");
     foreach (array_keys($give_exam_info) as $key) {
         $text = $key . ";" . $give_exam_info[$key] . "\n";
         fwrite($myfile, $text);
     }
     fclose($myfile);
 }