Question

帮助，我的代码中出现错误“ ErrorException（E_NOTICE）未定义的变量：actualLabels”

$title = "Data Confusion Matrix";
$testing_data = DataTesting::count();
$klasifikasi = Klasifikasi::with('sentimen')->get();
foreach($klasifikasi as $kelas){
    $predictedLabels[] = $kelas->sentimen->kategori;
    $testing = DataTesting::where('id_testing',$kelas->id_testing)->first();
    $twitter = TwitterStream::with('sentimen')->where('id_crawling',$testing->id_crawling)->first();
    $actualLabels[] = $twitter->sentimen->kategori;
 }
 $getPrecision = new ControllerConfusionMatrix($actualLabels, $predictedLabels);
 $accuracy = ControllerConfusionMatrix::score($actualLabels, $predictedLabels);
 $recall = $getPrecision->getRecall();
 $precision = $getPrecision->getPrecision();

Answer 1

将此行添加到代码的开头：$actualLabels = []; 由于$klasifikasi为空时，循环内的语句未执行，因此您将收到错误消息。因此不会创建$actualLabels变量。在这种情况下，您将得到(E_NOTICE) Undefined variable: actualLabels的错误。希望你能理解。

Answer 2

定义Array()

$predictedLabels = array();
$actualLabels = array();
            foreach($klasifikasi as $kelas){
                $predictedLabels[] = $kelas->sentimen->kategori;
                $testing = DataTesting::where('id_testing',$kelas->id_testing)->first();
                $twitter = TwitterStream::with('sentimen')->where('id_crawling',$testing->id_crawling)->first();
                $actualLabels[] = $twitter->sentimen->kategori;
            }

ErrorException（E_NOTICE）未定义的变量：actualLabels

2 个答案: