Skip to main content

how to display three lines on chart

I create a chart using canvasjs. Values display in chart is from mysql database. All working but the problem is, it showing just 1 line on chart (sensors_pres) from table SensorData on chart not all three sensors_pres, sensors_temperature_data and sensors_humidity. Other problem is on range slider is not showing hour from 0 to 24, test it. Click in left-up on button all and in right-up you will see the number -1 to 96. How can i solve? I opened data.php file with browser and all values working correct.

Here is my html&javascript code

<!DOCTYPE HTML>    
<html>    
<head>
<script type="text/javascript" src="https://canvasjs.com/assets/script/jquery-1.11.1.min.js"></script>
<script type="text/javascript" src="https://canvasjs.com/assets/script/canvasjs.stock.min.js"></script>
<script type="text/javascript">
window.onload = function () {  
$.getJSON("data.php", function (result) {
  var stockChart = new CanvasJS.StockChart("chartContainer",{
    title:{
      text:"StockChart with Numeric Axis"
    },
    animationEnabled: true,
    exportEnabled: true,
    charts: [{
      axisX: {
        crosshair: {
          enabled: true,
          snapToDataPoint: true
        }
      },
      axisY: {
        crosshair: {
          enabled: true,
          //snapToDataPoint: true
        }
      },
      data: [{
        type: "line",
        dataPoints: result
    }]
    }],    
    rangeSelector: {
      inputFields: {
        startValue: 00,
        endValue: 24,
        valueFormatString: "###0"
      },
      
      buttons: [{
        label: "00",
        range: 00,
        rangeType: "number"
      },{
        label: "12",
        range: 12,
        rangeType: "number"
      },{
        label: "24",
        range: 24,
        rangeType: "number"
      },{
        label: "All",        
        rangeType: "all"
      }]
    }
  });

  stockChart.render();    
  })
}

</script>
</head>
<body>
<div id="chartContainer" style="height: 450px; width: 100%;"></div>
</body>
</html>

here is my php code:

<?php

header('Content-Type: application/json');

$con = mysqli_connect("fdb30.awardspace.net","3758712_lnd","bogdanutzu97","3758712_lnd");

// Check connection
if (mysqli_connect_errno($con))
{
    echo "Failed to connect to DataBase: " . mysqli_connect_error();
}else
{
    $data_points = array();

    $result = mysqli_query($con, "SELECT * FROM SensorData");

    while($row = mysqli_fetch_array($result))
    {        
        $point = array("label" => $row['reading_time'] , "y" => $row['sensors_pres'],$row['sensors_temperature_data'],$row['sensors_humidity']);

        array_push($data_points, $point);       
    }

    echo json_encode($data_points, JSON_NUMERIC_CHECK);
}
mysqli_close($con);

?>


source https://stackoverflow.com/questions/68199972/how-to-display-three-lines-on-chart

Labels

Labels:

Comments

Post a Comment

Popular posts from this blog

ValueError: X has 10 features, but LinearRegression is expecting 1 features as input

So, I am trying to predict the model but its throwing error like it has 10 features but it expacts only 1. So I am confused can anyone help me with it? more importantly its not working for me when my friend runs it. It works perfectly fine dose anyone know the reason about it? cv = KFold(n_splits = 10) all_loss = [] for i in range(9): # 1st for loop over polynomial orders poly_order = i X_train = make_polynomial(x, poly_order) loss_at_order = [] # initiate a set to collect loss for CV for train_index, test_index in cv.split(X_train): print('TRAIN:', train_index, 'TEST:', test_index) X_train_cv, X_test_cv = X_train[train_index], X_test[test_index] t_train_cv, t_test_cv = t[train_index], t[test_index] reg.fit(X_train_cv, t_train_cv) loss_at_order.append(np.mean((t_test_cv - reg.predict(X_test_cv))**2)) # collect loss at fold all_loss.append(np.mean(loss_at_order)) # collect loss at order plt.plot(np.log(al...
Post a Comment
Read more

Sorting large arrays of big numeric stings

I was solving bigSorting() problem from hackerrank: Consider an array of numeric strings where each string is a positive number with anywhere from to digits. Sort the array's elements in non-decreasing, or ascending order of their integer values and return the sorted array. I know it works as follows: def bigSorting(unsorted): return sorted(unsorted, key=int) But I didnt guess this approach earlier. Initially I tried below: def bigSorting(unsorted): int_unsorted = [int(i) for i in unsorted] int_sorted = sorted(int_unsorted) return [str(i) for i in int_sorted] However, for some of the test cases, it was showing time limit exceeded. Why is it so? PS: I dont know exactly what those test cases were as hacker rank does not reveal all test cases. source https://stackoverflow.com/questions/73007397/sorting-large-arrays-of-big-numeric-stings
Post a Comment
Read more

How to load Javascript with imported modules?

I am trying to import modules from tensorflowjs, and below is my code. test.html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title </head> <body> <script src="https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@2.0.0/dist/tf.min.js"></script> <script type="module" src="./test.js"></script> </body> </html> test.js import * as tf from "./node_modules/@tensorflow/tfjs"; import {loadGraphModel} from "./node_modules/@tensorflow/tfjs-converter"; const MODEL_URL = './model.json'; const model = await loadGraphModel(MODEL_URL); const cat = document.getElementById('cat'); model.execute(tf.browser.fromPixels(cat)); Besides, I run the server using python -m http.server in my command prompt(Windows 10), and this is the error prompt in the console log of my browser: Failed to loa...
Post a Comment
Read more