D3.js 结合条形图和折线图

2024-02-26

我想通过将条形图与折线图组合来创建多个系列图表。当我使用rangeBands()为了设置输出范围,该线从图表中第一个柱的开头开始绘制,并在最后一个柱的开头结束。我应该更改什么以使该线从第一个刻度线开始并在最后一个刻度线结束?

var data = [{ date: '1-May-12', close: 58.13, open: 7.41 }, { date: '2-May-12', close: 53.98, open: 45.55 }, { date: '3-May-12', close: 67.00, open: 11.78}];

var margin = { top: 30, right: 40, bottom: 30, left: 50 },
	width = 600 - margin.left - margin.right,
	height = 270 - margin.top - margin.bottom;

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

var x = d3.scale.ordinal().rangeBands([0, width], .09); // <-- to change the width of the columns, change the .09 at the end to whatever
var y = d3.scale.linear().range([height, 0]);

var xAxis = d3.svg.axis().scale(x)
	.orient("bottom")
	.tickFormat(d3.time.format("%d-%b-%y"));

var yAxisLeft = d3.svg.axis().scale(y)
	.orient("left");

var valueline = d3.svg.line()
	.x(function (d) { return x(d.date); })
	.y(function (d) { return y(d.open); });

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 + ")");

// Get the data
data.forEach(function (d) {
	d.date = parseDate(d.date);
	d.close = +d.close;
	d.open = +d.open;
});

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

// 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")
		.style("fill", "steelblue")
		.call(yAxisLeft);

// Draw the bars
svg.selectAll("bar")
		.data(data)
		.enter()
		.append("rect")
		.style("fill", "#99ffcc")
		.attr("x", function (d) { return x(d.date); })
		.attr("width", x.rangeBand())
		.attr("y", function (d) { return y(d.close); })
		.attr("height", function (d) { return height - y(d.close); });

// Add the valueline path
svg.append("path")
		.attr("d", valueline(data));
body {
  font: 12px Arial;
}
path {
  stroke: red;
  stroke-width: 2;
  fill: none;
}
.axis path,
.axis line {
  fill: none;
  stroke: grey;
  stroke-width: 1;
  shape-rendering: crispEdges;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>

将线函数 x 访问器调整为范围带的一半:

var valueline = d3.svg.line()
    .x(function (d) { return x(d.date) + x.rangeBand()/2; })
    .y(function (d) { return y(d.open); });

完整代码:

var data = [{ date: '1-May-12', close: 58.13, open: 7.41 }, { date: '2-May-12', close: 53.98, open: 45.55 }, { date: '3-May-12', close: 67.00, open: 11.78}];

var margin = { top: 30, right: 40, bottom: 30, left: 50 },
	width = 600 - margin.left - margin.right,
	height = 270 - margin.top - margin.bottom;

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

var x = d3.scale.ordinal().rangeBands([0, width], .09); // <-- to change the width of the columns, change the .09 at the end to whatever
var y = d3.scale.linear().range([height, 0]);

var xAxis = d3.svg.axis().scale(x)
	.orient("bottom")
	.tickFormat(d3.time.format("%d-%b-%y"));

var yAxisLeft = d3.svg.axis().scale(y)
	.orient("left");

var valueline = d3.svg.line()
	.x(function (d) { return x(d.date) + x.rangeBand()/2; })
	.y(function (d) { return y(d.open); });

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 + ")");

// Get the data
data.forEach(function (d) {
	d.date = parseDate(d.date);
	d.close = +d.close;
	d.open = +d.open;
});

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

// 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")
		.style("fill", "steelblue")
		.call(yAxisLeft);

// Draw the bars
svg.selectAll("bar")
		.data(data)
		.enter()
		.append("rect")
		.style("fill", "#99ffcc")
		.attr("x", function (d) { return x(d.date); })
		.attr("width", x.rangeBand())
		.attr("y", function (d) { return y(d.close); })
		.attr("height", function (d) { return height - y(d.close); });

// Add the valueline path
svg.append("path")
		.attr("d", valueline(data));
body {
  font: 12px Arial;
}
path {
  stroke: red;
  stroke-width: 2;
  fill: none;
}
.axis path,
.axis line {
  fill: none;
  stroke: grey;
  stroke-width: 1;
  shape-rendering: crispEdges;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
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