Question

I would like to use jqPlot usinge data from server side coming in JSON, like described in this example: http://www.jqplot.com/tests/data-renderers.php

My code is nearly the same like the example:

function myGraph(jsonurl) {

  var ajaxDataRenderer = function(url, plot, options) {
    var ret = null;
    $.ajax({
      // have to use synchronous here, else the function
      // will return before the data is fetched
      async: false,
      url: url,
      dataType:"json",
      success: function(data) {
        ret=data;
        console.warn(data);
      }
    });
    return ret;
  };



var plot1 = $.jqplot('chartdiv', jsonurl, {
      title: 'myTitle',
      dataRenderer: ajaxDataRenderer,
      dataRendererOptions: {  unusedOptionalUrl: jsonurl    },
      series: [{
          label: 'myLabel',
          neighborThreshold: -1
      }],
      axes: {
          xaxis: {
              renderer: $.jqplot.DateAxisRenderer,
            //  min:'August 1, 2010 16:00:00',
              tickInterval: '2 months',
              tickOptions:{formatString:'%Y-%m-%d.%H:%M:%S'}
          },
          yaxis: {
              tickOptions:{formatString:'$%.2f'}
          }
      },
  });

On server side i’m using PHP (and Yii). The webpage returns an array, which is encoded to JSON by using CJSON::encode($resultArray); (this Yii function passed trough to the PHP JSON encode function).
The Results from the PHP script lookes like that:

{"2011-04-25 14:46:40":2,"2011-04-26 14:46:40":3,"2011-04-27 14:46:40":5}

The Ajax request on client side resolved something like this (output from console.info(); )

Object { 2011-04-25 14:46:40=2,  2011-04-26 14:46:40=3, ...}

Probably, jqPlot expect the following format:

[[["2011-04-25 14:46:40":0],["2011-04-26 14:46:40",3],["2011-04-27 14:46:40",0]]]

All the time i get the error uncaught exception: [object Object]
What is wrong?
Is there a way to convert the object for to the typical array form?

Thank you

Answer 1

I have something like this . I had 2 arrays for values,labels .You should construct string as below from arrays .

        $size = count($labels);

        for ($i = 0; $i < $size; $i++) {
            $result = $result . "['" . $labels[$i] . "'," . $values[$i] . "]";
            if($i != $size -1 ){
                $result = $result . ",";
            }
        }

OR if you dont have 2 arrays and just have this string {“2011-04-25 14:46:40″:2,”2011-04-26 14:46:40″:3,”2011-04-27 14:46:40”:5} you can replace { with [ , } with ] and , with ],[ . A dirty but quick solution .

After above code you might need to append ‘[‘ and ‘]’ on both sides and return value.