Javascript D3多折线图问题
您好,我正在尝试建立一个多折线图,显示每年每个月的费率。我在控制台中得到一个“TypeError:t是未定义的”错误,虽然我可以看到x轴和y轴被填充,但图表中没有显示任何线条。感谢您的帮助 HTML文件代码如下所示:Javascript D3多折线图问题,javascript,json,d3.js,Javascript,Json,D3.js,您好,我正在尝试建立一个多折线图,显示每年每个月的费率。我在控制台中得到一个“TypeError:t是未定义的”错误,虽然我可以看到x轴和y轴被填充,但图表中没有显示任何线条。感谢您的帮助 HTML文件代码如下所示: <!DOCTYPE html> <meta charset="utf-8"> <style> body { font: 10px sans-serif; } .axis path, .axis line { fill
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 80, bottom: 30, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x = d3.scale.ordinal().rangeRoundBands([0, width], .1);
var y = d3.scale.linear().range([height, 0]);
var color = d3.scale.ordinal().range(["#666666", "#262626", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
var xAxis = d3.svg.axis().scale(x).orient("bottom");
var yAxis = d3.svg.axis().scale(y).orient("left");
var line = d3.svg.line().interpolate("basis").x(function(d) { return x(d.date); }).y(function(d) { return y(d.value); });
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 + ")");
d3.json("yoy_values.json", function(error, data) {
if (error) throw error;
var myValues = d3.keys(data[0]).filter(function(key) { return key !== "date"; });
data.forEach(function(d) {
d.rates = myValues.map(function(name) { return {name: name, value: +d[name]}; });
console.log(d.rates);
});
x.domain(data.map(function(d) { return d.date; }));
y.domain([
d3.min(data, function(d) { return d3.min(d.rates, function(d) { return d.value; }); }),
d3.max(data, function(d) { return d3.max(d.rates, function(d) { return d.value; }); })
]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Rates");
var state = svg.selectAll(".state")
.data(myValues.slice().reverse())
.enter().append("g")
.attr("class", "state")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
state.append("path")
.attr("class", "line")
.attr("d", function(d) { return line(d.rates); })
.style("stroke", function(d) { return color(d.name); });
state.append("text")
.datum(function(d) { return {name: d.name, value: d.rates[d.rates.length - 1]}; })
.attr("transform", function(d) { return "translate(" + x(d.value) + "," + y(d.name) + ")"; })
.attr("x", 3)
.attr("dy", ".35em")
.text(function(d) { return d.name; });
});
</script>
很难从代码的目测中分辨出来,但我注意到:
[{name:“2014”,value:“0.0812”},{name:“2015”,value:“0.0780”},{name:“2016”,value:“0.0838”}
d.rates=myValues.map(函数(名称){return{name:name,value:+d[name]};})代码>
.attr(“d”,函数(d){返回行(d.rates);})
var line=d3.svg.line().interpolate(“basis”).x(函数(d){return x(d.date);}).y(函数(d){return y(d.value);})代码>
x.domain(data.map(函数(d){returnd.date;}))代码>
[
{"date":"Jan","2014":"0.0812","2015":"0.0780","2016":"0.0838"},
{"date":"Feb","2014":"0.0806","2015":"0.0768","2016":"0.0893"},
{"date":"Mar","2014":"0.0858","2015":"0.0847","2016":null},
{"date":"Apr","2014":"0.0848","2015":"0.0889","2016":null},
{"date":"May","2014":"0.0890","2015":"0.0890","2016":null},
{"date":"Jun","2014":"0.0928","2015":"0.0865","2016":null},
{"date":"Jul","2014":"0.0857","2015":"0.0799","2016":null},
{"date":"Aug","2014":"0.0905","2015":"0.0845","2016":null},
{"date":"Sep","2014":"0.1003","2015":"0.0934","2016":null},
{"date":"Oct","2014":"0.0971","2015":"0.0993","2016":null},
{"date":"Nov","2014":"0.0912","2015":"0.0973","2016":null},
{"date":"Dec","2014":"0.0800","2015":"0.0777","2016":null}
]