我在D3中有以下条形图:bin
我想在y-axis
和第一个栏之间添加一点偏移(相应的下一个栏应该相应推)。 x-axis
标签也是如此。 0.0
应该从x轴上的相同偏移量开始。有办法吗?
理想情况下,它应该如下所示:https://bl.ocks.org/mbostock/3885304
但是此示例使用ordinal
缩放并使用rangeRoundBands
我认为正在添加该偏移并且我使用linear
缩放,因此我不确定如何实现相同的效果。任何帮助表示赞赏。感谢。
答案 0 :(得分:1)
只需更改域名即可添加一些填充:
xScale.domain([-0.1, (data.length - 1) * 1.1]);
完整代码:
var data = [
{
amount:100,
year: "2008"
},
{
amount:300,
year: "2009"
},
{
amount:400,
year: "2010"
},
{
amount:100,
year: "2011"
}];
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 800 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// set up scales
var xScale = d3.scale.linear()
.range([0, width]);
xScale.domain([-0.1, (data.length - 1) * 1.1]);
var yMax = d3.max(data, function(d) { return d.amount; } );
var yScale = d3.scale.linear()
.range([height, 0]);
yScale.domain([0, yMax]).nice();
// set up axis
var xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom")
.tickPadding(10);
var yAxis = d3.svg.axis()
.scale(yScale)
.orient("left")
.tickFormat((d) => d > 10000 ? Math.round(d / 1000000000).toString() + "K" : d);
// set up svg and chart elements
var container = d3.select('#chart');
var svg = container.append("svg")
.attr("id", "mySVG")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom);
var chart = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
// render the axes
chart.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
chart.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end");
// render the ractangles
chart.selectAll(".bar")
.data(this.data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function (d, i) { return xScale(i); })
.attr("width", 50)
.attr("y", function (d) { return yScale(d.amount); })
.attr("height", function (d) { return height - yScale(d.amount); });

.bar {
fill: steelblue;
}
.bar:hover {
fill: brown;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.axis text {
font-size: 12px;
fill: #666;
}

<!DOCTYPE html>
<html>
<head>
<meta name="description" content="Bar Chart">
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<div id="chart">
</div>
</body>
</html>
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