ErrorException (E_NOTICE) Undefined variable: actualLabels

Question

Help, i got an error "ErrorException (E_NOTICE) Undefined variable: actualLabels" in my code

$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();

@AksenP - about all we can do is just vote to close and move on then; doubtless there'll be some people answering to pick the "low hanging fruit" (unless the question is closed) - decreasing the overall quality/usefulness of SO going forward, but such is life. — CD001, Dec 17 '19 at 10:22
@AksenP If you don't want to please don't insult, I really don't know how to fix the error — Listyawan, Dec 17 '19 at 10:26
@Listyawan - to be fair, you've asked 4 questions in the last 2 days, all of which amount to the same thing - very basic undefined index/variable errors, for which there are already canonical QAs you should refer to. Having the same questions repeatedly asked on SO just increases the noise and thus reduces the quality of the site, as a resource, overall. Please refer to the [Help Centre](https://stackoverflow.com/help) for more info. — CD001, Dec 17 '19 at 10:40

score 2 · Answer 1 · answered Dec 17 '19 at 10:35

2

Add this line to beginning of your code : $actualLabels = []; You are getting error because when $klasifikasi is empty, then the statement inside loop is not executed. So $actualLabels variable is not created. In this case you get errro of (E_NOTICE) Undefined variable: actualLabels. Hope you understand.

answered Dec 17 '19 at 10:35

Ankur Mishra

1,284
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@Listyawan welcome sir and enjoy coding – Ankur Mishra Dec 17 '19 at 10:40

score 0 · Accepted Answer · answered Dec 17 '19 at 10:18

0

define 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;
            }

answered Dec 17 '19 at 10:18

VIKAS KATARIYA

5,867
3
17
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you should explain why your answer is supposed to work. Code only answers are poor quality ones – Lelio Faieta Dec 17 '19 at 10:24
@Vikas Katariya Thank you very much – Listyawan Dec 17 '19 at 10:40
please select this answer. – VIKAS KATARIYA Dec 17 '19 at 10:40
@VikasKatariya it is not a game to who answers first. Also the accepted answer has a better quality and explains the issue and the solution to the OP that can learn from that (yours doesn't). You should know how SO works since you are not a newbie on the site – Lelio Faieta Dec 17 '19 at 10:43
Thank you so much please give upvote this answer @Listyawan – VIKAS KATARIYA Dec 17 '19 at 11:09

ErrorException (E_NOTICE) Undefined variable: actualLabels

2 Answers2