/**
* Find attributes depending on a type
* @param $limitWords
* @param $type With positive / negative words = 1, From the training set = 0
* @return array
*/
private function findAttributes($limitWords, $type)
{
//Step 1: clean tweet and save in field tweet2
$this->extractfromtweet();
$attributesList = array();
//Step 2: obtain attributes from tweet2
if ($type == 1) {
$objTweet = Tweetlab4::model()->findAll();
foreach ($objTweet as $tweet) {
$tweetAttributes = explode(" ", $tweet->tweet2);
foreach ($tweetAttributes as $tweetAttr) {
$tweetWord = strtolower(trim($tweetAttr));
if ($tweetWord != '') {
$objWordCount = Word::model()->count('word = :word', array(':word' => $tweetWord));
if ($objWordCount > 0) {
if (isset($attributesList[$tweetWord])) {
$attributesList[$tweetWord]++;
} else {
$attributesList[$tweetWord] = 1;
}
}
}
}
}
//Step 3: sort array from high to low
arsort($attributesList);
$mergedAttributesList = array();
$counter = 1;
foreach ($attributesList as $attribute => $value) {
if (!in_array($attribute, $mergedAttributesList)) {
array_push($mergedAttributesList, $attribute);
}
$counter++;
if ($counter > $limitWords) {
break;
}
}
} else {
foreach ($this->arrSentiment as $sentiment => $label_sentiment) {
$attributesList[$sentiment] = array();
$objTweet = Tweetlab4::model()->findAll('sentiment = :sentiment', array(':sentiment' => $sentiment));
foreach ($objTweet as $tweet) {
$tweetAttributes = explode(" ", $tweet->tweet2);
foreach ($tweetAttributes as $tweetAttr) {
$tweetWord = strtolower(trim($tweetAttr));
if ($tweetWord != '') {
if ($type == 1) {
$objWordCount = Word::model()->count('word = :word', array(':word' => $tweetWord));
if ($objWordCount > 0) {
if (isset($attributesList[$sentiment][$tweetWord])) {
$attributesList[$sentiment][$tweetWord]++;
} else {
$attributesList[$sentiment][$tweetWord] = 1;
}
}
} else {
if (isset($attributesList[$sentiment][$tweetWord])) {
$attributesList[$sentiment][$tweetWord]++;
} else {
$attributesList[$sentiment][$tweetWord] = 1;
}
}
}
}
}
//Step 3: sort array from high to low
arsort($attributesList[$sentiment]);
}
$mergedAttributesList = array();
foreach ($this->arrSentiment as $sentiment => $label_sentiment) {
$counter = 1;
foreach ($attributesList[$sentiment] as $attribute => $value) {
if (!in_array($attribute, $mergedAttributesList)) {
array_push($mergedAttributesList, $attribute);
}
$counter++;
if ($counter > $limitWords) {
break;
}
}
}
}
return array($attributesList, $this->arrSentiment, $mergedAttributesList);
}