Home forums Using CanvasJS Problem with axis and null value

This topic contains 1 reply, has 1 voice, and was last updated by  zEro 4 months, 3 weeks ago.

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  • #10842


    Hello, I have a problem with my axisX :

    I do this:`axisX:{
    suffix: “h”,
    minimum: -1,
    maximum: 24

    And I use a query for the data points :

    echo 'dataPoints: [',"\n";
     while ($row = mysqli_fetch_array($query)){
             echo '{label:'.$heure.',y:'.$statut.'},';
             echo "\n";
      echo ' ]',"\n";

    I want the $statut for every hour of one day, so 24 values. But sometimes in my database, there is no hours in the middle of the day, I want to write a value of 0 for those hours which are not in the database. So I need an axis with 24 graduations and some blanks where there is no value.

    Now I’ve got an axis with the hours of the days where $statut is not null. So there is not 24 graduations. And the axis put the value of my data and it get back to 0 after, its like this:


    Maybe it will be clear with pictures but I didn’t find how to import screenshots here.

    Thanks and sorry for my english.



    Finally I find my problem.

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