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graph with csv file

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  • #23058

    hi, i have tried the graph with csv data but it didnt display my data on the graph.
    here ismy coding

    <!DOCTYPE HTML>
    <html>
    <head> 
    <?php
    if(isset($_POST['submit'])){
    	  $filename =  $_FILES['update_file']['name'];
    	 $file = fopen($filename,"r")
    	  or die('Error occurred when open the file ' . $filename );
    	  
    	  $table = array();
    	  while($handle = fgetcsv($file))
    	  {
    		  var_dump($handle);
    	  }
    	  fclose($file);
    	 // $json = json_encode($andle);
    	  
    ?> 
    <script>
    window.onload = function () {
     
    var dataPoints = <?= $handle ?> ;
     
    var chart = new CanvasJS.Chart("chartContainer", {
    	animationEnabled: true,
    	exportEnabled: true,
    	title:{
    		text: "Temperature per 5 mins"
    	},
    	axisY: {
    		title: "Temperature",
    		includeZero: false
    	},
    	data: [{
    		type: "line",
    		//toolTipContent: "{y} metric tons",
    		dataPoints: dataPoints
    	}]
    });
    //chart.render();
     
    $.get("#update_file", getDataPointsFromCSV);
     
    //var updateInterval = 30000;
    //setInterval(function () { updateChart() }, updateInterval);
    
    function getDataPointsFromCSV(csv) {
    	var csvLines = points = [];
    	csvLines = csv.split(/[\r?\n|\r|\n]+/);
    	for (var i = 0; i < csvLines.length; i++) {
    		if (csvLines[i].length > 0) {
    			points = csvLines[i].split(",");
    			dataPoints.push({
    				label: points[0],
    				y: parseFloat(points[1])
    			});
    		}
    	}
    	chart.render();
    }
     
    }
    </script>
    <?php
    }
    ?>
    </head>
    <body>
    
    <script type="text/javascript" src="https://canvasjs.com/assets/script/jquery-1.11.1.min.js"></script>
    <script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
    
    <form method="POST" enctype="multipart/form-data">
    	
    	<input type="file" name="update_file"/>
    	<button type="submit" name="submit">Update</button>
    	</form>
    	<br/>
    	
    	<div id="chartContainer" style="height: 370px; width: 100%;"></div>
    </body>
    </html>
    #23060

    @stella,

    Can you kindly share a sample project reproducing the issue you are facing along with a sample CSV file over Google-Drive or Onedrive, so that we can look into your code, understand it better and help you out?

    __
    Priyanka M S
    Team CanvasJS

    #23062
    #23079

    @stella,

    Please take a look at this updated PHP file, which renders the chart using the data in CSV file (readcsv.csv).

    __
    Priyanka M S
    Team CanvasJS

    #23083

    hi, that works well. Thank you :)

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