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I am trying to use flot plug-in to plot some data which are wrote into a JSON file. It doesn't seem so hard to do but I can't find something that work...can you please help me.
That's the page I've wrote:
$(function () {
var data;
$.getJSON("1.json", function(json) {
var data = json;
});
var options = {
legend: {
show: true,
margin: 10,
backgroundOpacity: 0.5
},
points: {
show: true,
radius: 3
},
lines: {
show: true
}
};
var plotarea = $("#placeholder");
$.plot(plotarea , data, options);
});
while the 1.json file coitain all of the following:
{ label: "Values",
data: [
[1, 50.026],
[2, 50.028],
[3, 50.029],
[4, 50.026],
[5, 50.025],
[6, 50.016]
]
}
@MarcoJohannesen Even if I write "console.log(data)" after the JSON call the script still dowsn't work and no message appear on the screen. Using Chrome utility (I don't remember the name ;-)) I can see that hte file 1.json has been loaded correctly. I think that the problem is that first of all the script is executed and after that the file 1.json is loaded. I've made a little edit on the page. You can see a demo on this page This is the page "1.htm" code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script language="javascript" type="text/javascript" src="jquery.js"></script>
<script language="javascript" type="text/javascript" src="jquery.flot.js"></script>
</head>
<body>
<h1>Graph</h1>
<div id="placeholder" style="width:600px;height:300px;"></div>
<script language="javascript" type="text/javascript">
$(function () {
var data;
$.getJSON("1.json", function(json) {
var data = json;
});
console.log(data);
var plotarea = $("#placeholder");
$.plot(plotarea , data);
});
</script>
</body>
</html>
and this is the 1.json (I've added the square brackets)
[{ label: "Values",
data: [
[1, 50.026],
[2, 50.028],
[3, 50.029],
[4, 50.026],
[5, 50.025],
[6, 50.016]
]
}}
I definitely found a way to make a working page. That's the code I used:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script language="javascript" type="text/javascript" src="jquery.js"></script>
<script language="javascript" type="text/javascript" src="jquery.flot.js"></script>
</head>
<body>
<h1>Graph</h1>
<script language="javascript" type="text/javascript">
$(document).ready(function(){
$.getJSON("1.json", function(json) {
//succes - data loaded, now use plot:
var plotarea = $("#placeholder");
var data=[json.data];
$.plot(plotarea , data);
});
});
</script>
<div id="placeholder" style="width:600px;height:300px;"></div>
</body>
</html>
and that's the json file (taken from the flot official exaples to be sure that is correctly formatted)
{
"label": "Europe (EU27)",
"data": [[1999, 1], [2000, 0.23], [2001, 3], [2002, 4], [2003, 1.3], [2004, 2.5], [2005, 2.0], [2006, 3.1], [2007, 2.9], [2008, 0.9]]
}
now I'm going to bed but tomorrow I we should try to add the label to the plot and trying with more than one series of values.
881
I use this to generate automatic updated information website for project progress.
My small example using more than one type of diagram: line and bar.
I find it easier to understand if I have a running example, so here we are:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script language="javascript" type="text/javascript" src="jquery.js"></script>
<script language="javascript" type="text/javascript" src="jquery.flot.js"></script>
</head>
<body>
<h1>Graph</h1>
<script language="javascript" type="text/javascript">
$(document).ready(function(){
$.getJSON("barLine.json", function(json) {
//succes - data loaded, now use plot:
var plotarea = $("#placeholder");
var dataBar=json.dataBar;
var dataLine=json.dataLine;
$.plot(plotarea , [
{
data: dataBar,
bars: {show: true}
},
{
data: dataLine,
lines: { show: true, steps: false }
}
]
);
});
});
</script>
<div id="placeholder" style="width:600px;height:300px;"></div>
</body>
</html>
And the data(barLine.json):
{
"label": "Europe (EU27)",
"dataBar": [[1999, 1], [2000, 0.23], [2001, 3], [2002, 4], [2003, 1.3], [2004, 2.5], [2005, 2.0], [2006, 3.1], [2007, 2.9], [2008, 0.9]],
"dataLine": [[1999, 2], [2000, 3.23], [2001, 1], [2002, 5], [2003, 2.3], [2004, 6.5], [2005, 4.0], [2006, 3.1], [2007, 0.9], [2008, 6.9], [2009, 9.9] ]
}
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