d3中json数据的折线图
[英]line chart of json data in d3
问题描述
I am learning d3. 
我正在学习d3。 I want to make a line chart using json data. 我想用json数据制作折线图。 The data I am using is: 我使用的数据是：
var data = [
{ "at": "2014-11-18T07:29:03.859Z", "value": 0.553292},
{ "at": "2014-11-18T07:28:53.859Z", "value": 0.563292},
{ "at": "2014-11-18T07:28:43.859Z", "value": 0.573292},
{ "at": "2014-11-18T07:28:33.859Z", "value": 0.583292},
{ "at": "2014-11-18T07:28:13.859Z", "value": 0.553292},
{ "at": "2014-11-18T07:28:03.859Z", "value": 0.563292}];
I want "at" on x axis and "value" on y axis. 我希望x轴上的“at”和y轴上的“value”。 Also I need to parse the "at" as time only. 另外，我需要解析“at”只作为时间。 Please provide me pointers how i will proceed further. 请指点我将如何进一步。 The code till now I have implemented is below. 到目前为止我已经实现的代码如下。 I tried to look for documentation for this but found none. 我试图为此寻找文档，但没有找到。
<html>
<head>
<title>line chart on json</title>
<script src="http://d3js.org/d3.v2.js"></script>
<style>
/* tell the SVG path to be a thin blue line without any area fill */
path {
stroke: steelblue;
stroke-width: 1;
fill: none;
}
</style>
</head>
<body>
<script>
var width = 400;
var height = 150;
var data = [
{ "at": "2014-11-18T07:29:03.859Z", "value": 0.553292},
{ "at": "2014-11-18T07:28:53.859Z", "value": 0.563292},
{ "at": "2014-11-18T07:28:43.859Z", "value": 0.573292},
{ "at": "2014-11-18T07:28:33.859Z", "value": 0.583292},
{ "at": "2014-11-18T07:28:13.859Z", "value": 0.553292},
{ "at": "2014-11-18T07:28:03.859Z", "value": 0.563292}];
var x = d3.scale.ordinal();
var y = d3.scale.linear().range([height, 0]);
var xAxis = d3.svg.axis().scale(x).orient("bottom");
var line = d3.svg.line()
.x(function(d) { return x(d.at);})
.y(function(d) { return y(d.value); })
.interpolate("linear")
var graph = d3.select(graph1).append("svg:svg").attr("width", "300"). attr("height", "150");
function make_y_axis() {
return d3.svg.axis().scale(y).orient("left").ticks(5)
}
</script>
</body>
</html>
2 个解决方案
解决方案1
6 已采纳 2014-11-26 12:29:30
Look at this example http://bl.ocks.org/crayzeewulf/9719255 请看这个例子http://bl.ocks.org/crayzeewulf/9719255
There used 2 graphs, but you can use just one and place data as you want. 使用了2个图表，但您可以只使用一个图表并根据需要放置数据。
As for date you can look at this example http://jsfiddle.net/robdodson/KWRxW/ , xAxis in particular. 至于日期，您可以查看此示例http://jsfiddle.net/robdodson/KWRxW/ ，特别是xAxis。
var xAxis = d3.svg.axis()
.scale(x)
.orient('bottom')
.ticks(d3.time.days, 1)
.tickFormat(d3.time.format('%a %d'))
.tickSize(0)
.tickPadding(8);
解决方案2
1 2018-01-02 11:26:00
What is graph1 in the below line: 什么是以下行中的graph1：
var graph = d3.select(graph1).append("svg:svg").attr("width", "300"). var graph = d3.select（graph1）.append（“svg：svg”）。attr（“width”，“300”）。 attr("height", "150"); attr（“身高”，“150”）;
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.