Loading Highcharts series from XML using jQuery

Question

I am trying to populate a highchart series from an xml source using jQuery. The XML file is an export from RRDTool and has the following format:

<data>
<row><t>1347559200</t><v>2.1600000000e+01</v></row>
<row><t>1347562800</t><v>2.1504694630e+01</v></row>
<row><t>1347566400</t><v>2.1278633024e+01</v></row>
.
.
.
</data>

My approach was to load the data using jQuery and push the series to the chart:

$.ajax({
      type: "GET",
      url: "data/data.xml",
      dataType: "xml",
      success: function(xml) {
        var series = {  data: []
                    };

        $(xml).find("row").each(function()
        {
            var t = parseInt($(this).find("t").text())*1000
            var v = parseFloat($(this).find("v").text())
            series.data.push([t,v]);
        });
        options.series.push(series);
      }
  });

I end up getting the following error:

Unexpected value NaN parsing y attribute

I created a JSFiddle to demonstrate the code: http://jsfiddle.net/GN56f/

Could you add a console.log statement after your array is populated and verify that all of the v tags are numeric? — marteljn
– marteljn, Commented Sep 14, 2012 at 21:03
@Adrian a fiddle that doesn't reproduce the problem is useless — Musa
– Musa, Commented Sep 14, 2012 at 21:06
@Musa Yeah, I tried to run it, but there are problems with cross domain requests. What a let down... — Adriano Carneiro
– Adriano Carneiro, Commented Sep 14, 2012 at 21:09

Greg Ross · Accepted Answer · 2012-09-14 21:12:47Z

2

Aside from the cross-domain issue, the error is due to there being an existing empty series in the plot options. The initial series in the options should be set to:

series: []

instead of:

series: [{ name: 'Temperature', data: [] }]

The subsequent call to options.series.push(series); merely adds a new series leaving the empty one unchanged.

answered Sep 14, 2012 at 21:12

Greg Ross

3,4992 gold badges30 silver badges26 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Ricardo Lohmann · Accepted Answer · 2012-09-15 00:40:44Z

Problems:

you forgot var before declare options and chart
forgot ; after end options
Hava you tried to log options before pass to Highcharts ? You're passing the following series.

That's the expected result ? I think no.

series: [{
    name: 'Temperature',
    data: []
}, {
    data: [// data from xml]
}]

You're creating the chart before complete the request, so options.series.data.push will not work, you have to use setData to update dynamically, but there's a problem, you don't know how long the request you take, so I suggest you to create the chart inside the success.

Try the following.

success: function(xml) {
    $('row', xml).each(function() {
        options.series.data.push([t,v]);
    });
    //@todo: declare chart as global before the ajax function
    chart = new Highcharts.Chart(options);
}

Collectives™ on Stack Overflow

Loading Highcharts series from XML using jQuery

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related