javascript - flot how to know the x axis points in dynamic data -

i using flot jquery library draw charts.

when chart has specific number of columns, can set x values points.

but have dynmic data. how can know points of x axis please?

for example,

the x axis of first point 1325876000000 x axis of second point 1328194400000 third 1330360000000 fourth 1332838400000 

but lets have 9 columns. how can know x axis them please?

i printing chart in way

var holder = $('#vertical-chart');     if (holder.length) {        $.plot(holder, data, chartoptions);    } 

the input data this

label: "label1"

data: [[1325876000000,0],[1325876000000,0],[1325876000000,0],[1325876000000,30]] 

but don't know how many points in array. 11 or 2

edit

this chartoption

  chartoptions = {            xaxis: {                min: (new date(2011, 11, 15)).gettime(),                max: (new date(2012, 04, 18)).gettime(),                mode: "time",                ticksize: [2, "month"],                monthnames: ["jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sep", "oct", "nov", "dec"],                ticklength: 0            },            grid: {                hoverable: true,                clickable: false,                borderwidth: 0            },            bars: {                show: true,                barwidth: 12 * 24 * 60 * 60 * 300,                fill: true,                linewidth: 1,                order: true,                linewidth: 0,                fillcolor: { colors: [{ opacity: 1 }, { opacity: 1 }] }            },             tooltip: true,            tooltipopts: {                content: '%s: %y'            },            colors: app.chartcolors        } 

when using $.plot(holder, data, chartoptions);, save plot variable.

declare var plot; globally,

and call this: plot = $.plot(holder, data, chartoptions);.

you can grab data plot this:

var datasets = []; var xdata = [];  datasets = plot.getdata();    //this returns array of datasets  //goes through each series of data (var = 0; < datasets.length; i++){     //picks series label of "label 1"     if (datasets[i].label == "label 1"){         //copies x coordinates series xdata         (var j = 0; j < datasets[i].data[j].length; j++){             xdata.push(datasets[i].data[j][0]);               //if want y coords, use datasets[i].data[j][1]         }     } }