问题:
我是D3.js的新手,我创建了一个从数组中获取数据的条形图。我将文本放在条形图的顶部,文本比条形图本身宽。我想将它垂直旋转,以便文本穿过条形图的中间。
我知道.attr("transform", "rotate(180)")
无法正常工作,因为它会将我的文字旋转到屏幕外。我找到了Mike Bostock的答案here,但它似乎对我不起作用,我不知道我做错了什么。他说我需要改变原点的旋转点,但我不能让它起作用。
感谢任何帮助,您可以找到以下代码:
var label = svg.selectAll("text")
.data(data)
.enter()
.append("text")
.text(function(d){
return d;
})
.attr("x", function(d, i){
xText = i*(w/data.length);
return xText;
})
.attr("y", function(d){
yText = h - yScale(d);
return yText;
})
.attr("transform", "translate(" + xText + "," + yText + ") rotate(90)")
.attr("fill", "black")
.attr("font-family", "sans-serif")
.attr("font-size", "11px");
谢谢!
答案 0 :(得分:6)
您正在设置x
和y
属性并翻译文本。使用旋转,您只想使用translate
:
.attr("transform", function(d,i){
var xText = i * (w / data.length);
var yText = h - yScale(d.v);
return "translate(" + xText + "," + yText + ") rotate(90)";
})
另外,我发现你的示例代码令人困惑,我假设你的数据是一个字符串数组,因为你这样做:
.text(function(d) {
return d;
})
但这会使yScale(d)
返回NaN。
这是一个很好用的例子:
<html>
<head>
<script data-require="d3@3.5.3" data-semver="3.5.3" src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.js"></script>
</head>
<body>
<script>
var w = 300,
h = 300,
data = [{
t: "Now",
v: 50
},{
t: "is",
v: 25
},{
t: "the",
v: 10
},{
t: "winter",
v: 30
}];
var svg = d3.select('body')
.append('svg')
.attr('width', w)
.attr('height', h);
var yScale = d3.scale.linear()
.range([0, h])
.domain([60, 0]);
var label = svg.selectAll("text")
.data(data)
.enter()
.append("text")
.text(function(d) {
return d.t;
})
.attr("transform", function(d,i){
var xText = i * (w / data.length);
var yText = h - yScale(d.v);
return "translate(" + xText + "," + yText + ") rotate(90)";
})
.attr("fill", "black")
.attr("font-family", "sans-serif")
.attr("font-size", "11px");
</script>
</body>
</html>
答案 1 :(得分:1)
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.bar {
fill: steelblue;
}
.bar:hover {
fill: brown;
}
.axis {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
</style>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script>
var data = [{
"letter": "A",
"frequency": 0.08167
}, {
"letter": "B",
"frequency": 0.01492
}, {
"letter": "C",
"frequency": 0.02782
}, {
"letter": "D",
"frequency": 0.04253
}, {
"letter": "E",
"frequency": 0.12702
}];
var margin = {
top: 20,
right: 20,
bottom: 30,
left: 40
},
width = 500 - margin.left - margin.right,
height = 200 - margin.top - margin.bottom;
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.ticks(10, "%");
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 + ")");
x.domain(data.map(function(d) {
return d.letter;
}));
y.domain([0, d3.max(data, function(d) {
return d.frequency;
})]);
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("Frequency");
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) {
return x(d.letter);
})
.attr("width", x.rangeBand())
.attr("y", function(d) {
return y(d.frequency);
})
.attr("height", function(d) {
return height - y(d.frequency);
});
function type(d) {
d.frequency = +d.frequency;
return d;
}
var text = svg.selectAll(".text").data(data);
text.enter()
.append("text")
.attr("class", "text")
.attr("x", function(d, i) {
return x(d.letter);
})
.attr("y", function(d) {
return y(d.frequency);
})
.text(function(d) {
return d.letter;
})
.attr("transform", function(d) {
return "rotate(90 " + x(d.letter) + "," + (y(d.frequency) - d.letter.length) + ")"
});
</script>
您可以试试这个,作为基础,您可以根据需要修改它。我希望它有所帮助。