我正在尝试在D3.js中创建一个简单的折线图,从Javascript中的数组加载我的数据。
我从这个简单的例子开始
http://bl.ocks.org/d3noob/b3ff6ae1c120eea654b5
我正在关注这篇文章中的建议
D3js take data from an array instead of a file
这是你的代码
<!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>
当我尝试执行时,我在Web控制台中获得以下错误
d3.v3.min.js:1 Error: <path> attribute d: Expected number, "MNaN,0.9012875536…".
任何建议/示例都将受到赞赏!!!
切萨雷
答案 0 :(得分:2)
您有另一种日期格式。试试这个:
var parseDate = d3.time.format("%d-%m-%Y").parse;
在d.date
中使用d.time
代替x.domain
:
x.domain(d3.extent(data, function(d) { return d.time; }));