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

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype
Post a Comment
Read more

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...
Post a Comment
Read more

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