我在d3.js中按照此块上的示例实现了一个多系列折线图:http://bl.ocks.org/mbostock/3884955。但是,X轴未显示。 X轴应显示日期。这是我的代码:
<svg width="960" height="500"></svg>
<script src="//d3js.org/d3.v4.min.js"></script>
<script>
var svg = d3.select("svg"),
margin = {top: 20, right: 80, bottom: 30, left: 50},
width = svg.attr("width") - margin.left - margin.right,
height = svg.attr("height") - margin.top - margin.bottom,
g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var parseTime = d3.timeParse("%Y%m%d");
var x = d3.scaleBand().rangeRound([0, width]),
// xAxis = d3.svg.axis().scale(x).orient("bottom"),
y = d3.scaleLinear().range([height, 0]),
z = d3.scaleOrdinal(d3.schemeCategory10);
var line = d3.line()
.curve(d3.curveBasis)
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.price); });
d3.tsv("data.tsv", type, function(error, data) {
if (error) throw error;
var products = data.columns.slice(1).map(function(id) {
return {
id: id,
values: data.map(function(d) {
return {date: d.date, price: d[id]};
})
};
});
x.domain(data.map( function(d) { return d.date; }));
y.domain([
d3.min(products, function(c) { return d3.min(c.values, function(d) { return d.price; }); }),
d3.max(products, function(c) { return d3.max(c.values, function(d) { return d.price; }); })
]);
z.domain(products.map(function(c) { return c.id; }));
g.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
g.append("g")
.attr("class", "axis axis--y")
.call(d3.axisLeft(y))
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", "0.71em")
.attr("fill", "#000")
.text("Price $");
var product = g.selectAll(".product")
.data(products)
.enter().append("g")
.attr("class", "product");
product.append("path")
.attr("class", "line")
.attr("d", function(d) { return line(d.values); })
.style("stroke", function(d) { return z(d.id); });
product.append("text")
.datum(function(d) { return {id: d.id, value: d.values[d.values.length - 1]}; })
.attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.price) + ")"; })
.attr("x", 3)
.attr("dy", "0.35em")
.style("font", "10px sans-serif")
.text(function(d) { return d.id; });
});
function type(d, _, columns) {
d.date = parseTime(d.date);
for (var i = 1, n = columns.length, c; i < n; ++i) d[c = columns[i]] = +d[c];
return d;
}
以下是我的代码生成的图表: - http://bizvizmap.com/timeseries.html
答案 0 :(得分:0)
您的数据可能存在一些问题,因为这个plunker 完全您的代码,我创建了一些虚假数据:
date,foo,bar,baz
20160101,11,23,45
20160102,21,22,35
20160103,44,76,54
20160104,31,23,45
20160105,41,63,15
20160106,12,22,25
以下是plunker:https://plnkr.co/edit/xZY02zVTEh6o9RwNGJBw?p=preview
x轴上的刻度是乱七八糟的,因为你在序数范围内使用完整的JS日期。正因为如此,使用时间尺度更有意义,就像在另一个玩家中一样:https://plnkr.co/edit/n5u8N9aK8YELtTCHexgR?p=preview