javascript - How to pass JSON to jqChart? -

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javascript - How to pass JSON to jqChart? -

client side sends post request php on server side. php returns json client. example:

[["1","-1"],["2","0"],["3","0"],["4","0"],["5","4"],["6","5"],["7","3"]]

now client side have create chart. created chart jquery plugin jqplot , flot, jqchart doesn't show correctly. here jquery code:

if ($jqlib == "flot") { var d2 = [[0, 3], [4, 8], [8, 5], [9, 13]]; $.post('database2json.php', function(data){ $.plot($("#placeholder"), [d2, data]); }, 'json' ); } else if ($jqlib == "jqchart") { $.post('database2json.php', function(podaci){ $('#placeholder').jqchart({ title: { text: 'chart title'}, series: [ { type: 'line', data: podaci } ] }); }); }

with code, flot draws chart line, , jqchart draws chart there not line, it's empty chart.

how solve problem?

edit1: here screenshot of jqchart output:

on x axis draws 1 31 expected, y axis ok, there no line.

edit2: @draganmatek, mentioned jqchart accepts pair values [x, y], x string, date or numeric, , y numeric.

in database there both columns, type int.

php code on server side, fetch these info is:

$result = mysql_query("select dan, temperatura temperatura"); $niz = array(); while ($row = mysql_fetch_array($result)) { $niz[] = array($row['dan'], $row['temperatura']); } $obj = json_encode($niz); echo $obj;

i don't understand why it's both x , y strings after sending json. maybe parse on client side?

edit3: checked firebug on client side this:

[["1","-1"],["2","0"],["3","0"],["4","0"],["5","4"],["6","5"],["7","3"],["8","2"],["9","2"],["10","1"],["11","-2"],["12","-2"],["13","0"],["14","1"],["15","-2"],["16","-1"],["17","-1"],["18","-2"],["19","-1"],["20","3"],["21","-1"],["22","0"],["23","1"],["24","3"],["25","1"],["26","1"],["27","-1"],["28","-1"],["29","4"],["30","5"],["31","5"]]

why so? database there 2 integers.

it seems jqchart needs int array elements , can't deal strings. updated code given below.

$.post('database2json.php', function(podaci){ $.each( podaci, function(i, e) { podaci[i][0] = parseint(e[0]); podaci[i][1] = parseint(e[1]); }); $('#placeholder').jqchart({ title: { text: 'chart title'}, series: [ { type: 'line', data: podaci } ] }); });

javascript jquery arrays jqchart

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