2016-06-28 135 views
2

我正在尝试在D3.js中使用Javascript中的数组加载我的数据中的简单线条图。在D3.js中创建折线图,从数组中加载数据

我从这个简单的例子开始

http://bl.ocks.org/d3noob/b3ff6ae1c120eea654b5

,我按照这篇文章的建议

D3js take data from an array instead of a file

在这里,你是我的代码

<!DOCTYPE html> 
<meta charset="utf-8"> 
<style> /* set the CSS */ 

body { font: 12px Arial;} 

path { 
    stroke: steelblue; 
    stroke-width: 2; 
    fill: none; 
} 

.axis path, 
.axis line { 
    fill: none; 
    stroke: grey; 
    stroke-width: 1; 
    shape-rendering: crispEdges; 
} 

</style> 
<body> 

<!-- load the d3.js library -->  
<script src="http://d3js.org/d3.v3.min.js"></script> 

<script> 

// Set the dimensions of the canvas/graph 
var margin = {top: 30, right: 20, bottom: 30, left: 50}, 
    width = 600 - margin.left - margin.right, 
    height = 270 - margin.top - margin.bottom; 

// Parse the date/time 
var parseDate = d3.time.format("%d-%b-%y").parse; 

// Set the ranges 
var x = d3.time.scale().range([0, width]); 
var y = d3.scale.linear().range([height, 0]); 

// Define the axes 
var xAxis = d3.svg.axis().scale(x) 
    .orient("bottom").ticks(5); 

var yAxis = d3.svg.axis().scale(y) 
    .orient("left").ticks(5); 

// Define the line 
var valueline = d3.svg.line() 
    .x(function(d) { return x(d.date); }) 
    .y(function(d) { return y(d.close); }); 

// Adds the svg canvas 
var svg = d3.select("body") 
    .append("svg") 
     .attr("width", width + margin.left + margin.right) 
     .attr("height", height + margin.top + margin.bottom) 
    .append("g") 
     .attr("transform", 
       "translate(" + margin.left + "," + margin.top + ")"); 

var data = [ 
    {time: "01-01-2000", value:23.2}, 
    {time: "02-01-2000", value:22.2}, 
    {time: "03-01-2000", value:21.5}, 
    {time: "04-01-2000", value:21.2}, 
    {time: "05-01-2000", value:20.8}, 
    {time: "06-01-2000", value:21.6}, 
    {time: "01-02-2000", value:21.6}, 
    {time: "01-03-2000", value:22.0}, 
    {time: "01-04-2000", value:22.4}, 
    {time: "01-05-2000", value:23.3}, 
]; 


// Get the data 
//d3.csv("data.csv", function(error, data) { 
     data.forEach(function(d) { 
      d.date = parseDate(d.time); 
      d.close = +d.value; 
     }); 

    // Scale the range of the data 
    x.domain(d3.extent(data, function(d) { return d.time; })); 
    y.domain([0, d3.max(data, function(d) { return d.value; })]); 

    // Add the valueline path. 
    svg.append("path") 
     .attr("class", "line") 
     .attr("d", valueline(data)); 

    // Add the X Axis 
    svg.append("g") 
     .attr("class", "x axis") 
     .attr("transform", "translate(0," + height + ")") 
     .call(xAxis); 

    // Add the Y Axis 
    svg.append("g") 
     .attr("class", "y axis") 
     .call(yAxis); 

//}); 

</script> 
</body> 

当我尝试执行我在我的Web控制台中获取以下错误

d3.v3.min.js:1 Error: <path> attribute d: Expected number, "MNaN,0.9012875536…". 

任何建议/示例将被赞赏!

Cesare

回答

2

您有其他的日期格式。试试这个:

var parseDate = d3.time.format("%d-%m-%Y").parse; 

而在你x.domain使用d.date代替d.time

x.domain(d3.extent(data, function(d) { return d.time; })); 

演示:https://embed.plnkr.co/SGRyjWxjReXq8ENLd4LI/

+0

确定它的工作现在!还有一个很快的问题:如果我还需要在我的时间中添加小时,例如01-01-2000-10:30:23(gg-mm-yyyy -hh:mm.sec),那么正确的格式日期是什么在D3?如有必要,我可以改变我的时间结构,但我必须管理分钟和秒钟......预先感谢您! – Cesare

+1

你可以从[d3.time.format docs](https://github.com/d3/d3-3.x-api-reference/blob/master/Time-Formatting.md) –