我想通过将条形图与折线图组合来创建多系列图表。当我使用rangeBands()
设置输出范围时,线条开始在第一个条形的开头绘制,并在图表的最后一个条形的开头结束。我应该改变什么,以便线从第一个嘀嗒声开始并在最后一个嘀嗒声结束?
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));
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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;
}
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<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
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答案 0 :(得分:8)
将行函数x存取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));
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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;
}
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<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
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