浮点如何知道动态数据中的x轴点 [英] flot how to know the x axis points in dynamic data
问题描述
我正在使用flot jquery库绘制图表.
当图表具有特定的列数时,我可以为点设置x值.
但是现在我有一个动态数据.那么我怎么知道x轴的点呢?
例如,
the x axis of the first point is 1325876000000
the x axis of the second point is 1328194400000
the third is 1330360000000
the fourth is 1332838400000
但是可以说我将有9列.我怎么知道他们的x轴?
我以这种方式打印图表
var holder = $('#vertical-chart');
if (holder.length) {
$.plot(holder, data, chartOptions);
}
输入数据是这样的
标签:"label1"
data: [[1325876000000,0],[1325876000000,0],[1325876000000,0],[1325876000000,30]]
但是现在我不知道该数组中有多少个点.它可以是11或2
编辑
此图表选项
chartOptions = {
xaxis: {
min: (new Date(2011, 11, 15)).getTime(),
max: (new Date(2012, 04, 18)).getTime(),
mode: "time",
tickSize: [2, "month"],
monthNames: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
tickLength: 0
},
grid: {
hoverable: true,
clickable: false,
borderWidth: 0
},
bars: {
show: true,
barWidth: 12 * 24 * 60 * 60 * 300,
fill: true,
lineWidth: 1,
order: true,
lineWidth: 0,
fillColor: { colors: [{ opacity: 1 }, { opacity: 1 }] }
},
tooltip: true,
tooltipOpts: {
content: '%s: %y'
},
colors: App.chartColors
}
使用$.plot(holder, data, chartOptions);
时,使用变量保存图.
全局声明var plot;
,然后这样调用:plot = $.plot(holder, data, chartOptions);
.
您可以像这样从图中获取数据:
var datasets = [];
var xData = [];
datasets = plot.getData(); //this returns an array of all datasets
//goes through each series of data
for (var i = 0; i < datasets.length; i++){
//picks the series with label of "label 1"
if (datasets[i].label == "label 1"){
//copies x coordinates from the series into xData
for (var j = 0; j < datasets[i].data[j].length; j++){
xData.push(datasets[i].data[j][0]); //if you want y coords, use datasets[i].data[j][1]
}
}
}
I am using flot jquery library to draw charts.
when my chart has a specific number of columns, I can set the x values for my points.
but now I have a dynmic data. so how can I know the points of the x axis please?
for example,
the x axis of the first point is 1325876000000
the x axis of the second point is 1328194400000
the third is 1330360000000
the fourth is 1332838400000
but lets say that I will have 9 columns. how can I know the x axis for them please?
I am printing the chart in this way
var holder = $('#vertical-chart');
if (holder.length) {
$.plot(holder, data, chartOptions);
}
the input data is like this
label: "label1"
data: [[1325876000000,0],[1325876000000,0],[1325876000000,0],[1325876000000,30]]
but now I don't know how many points in that array. it could be 11 or it could be 2
edit
this the 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 the plot with a variable.
Declare var plot;
globally,
and then call like this: plot = $.plot(holder, data, chartOptions);
.
You can grab the data from the plot like this:
var datasets = [];
var xData = [];
datasets = plot.getData(); //this returns an array of all datasets
//goes through each series of data
for (var i = 0; i < datasets.length; i++){
//picks the series with label of "label 1"
if (datasets[i].label == "label 1"){
//copies x coordinates from the series into xData
for (var j = 0; j < datasets[i].data[j].length; j++){
xData.push(datasets[i].data[j][0]); //if you want y coords, use datasets[i].data[j][1]
}
}
}
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