用字母数字字符标记轴 [英] Labeling the axis with alphanumeric characters
本文介绍了用字母数字字符标记轴的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
请考虑代码index.html
consider the code index.html
<!DOCTYPE html>
<html>
<head>
<title>D3 test</title>
<style>
.grid .tick {
stroke: lightgrey;
opacity: 0.7;
}
.grid path {
stroke-width: 0;
}
.chart {
}
.main text {
font: 10px sans-serif;
}
.axis line, .axis path {
shape-rendering: crispEdges;
stroke: black;
fill: none;
}
circle {
fill: steelblue;
}
</style>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.v2.js">
</script>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
</head>
<body>
<div class='content'>
<!-- /the chart goes here -->
</div>
<script type="text/javascript" src="scatterchart.js"></script>
</body>
</html>
和scatterchart.js，其脚本如下
and scatterchart.js whose script is as follows
var color = d3.scale.ordinal().range(["#b41f2d", "#ff7f0e"]);
var data = [
[2,2],
[3,3],
[4,4],
[5, 4],
[5.5, 5],
[6, 6],
[6, 7],
[6.5,8],
[6.5,16],
[17, 16]
];
var margin = {
top: 20,
right: 15,
bottom: 60,
left: 25
}, width = 950 - margin.left - margin.right,
height = 480 - margin.top - margin.bottom;
var x = d3.scale.linear()
.domain([0, d3.max(data, function (d) {
return d[0];
})])
.range([0, width]);
var y = d3.scale.linear()
.domain([0, d3.max(data, function (d) {
return d[1];
})])
//.range([height, 0]) //flip y
.range([0, height]);
var chart = d3.select('body')
.append('svg:svg')
.attr('width', width + margin.right + margin.left)
.attr('height', height + margin.top + margin.bottom)
.attr('class', 'chart');
var main = chart.append('g')
.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')')
.attr('width', width)
.attr('height', height)
.attr('class', 'main');
// draw the x axis
var xAxis = d3.svg.axis()
.scale(x)
//.orient('bottom')
.orient('top'); // adjust ticks to new x axis position
main.append('g')
//.attr('transform', 'translate(0,' + height + ')')
.attr('transform', 'translate(0,0)') // move x axis up
.attr('class', 'main axis date')
.call(xAxis);
// draw the y axis
var yAxis = d3.svg.axis()
.scale(y)
.orient('left');
main.append('g')
.attr('transform', 'translate(0,0)')
.attr('class', 'main axis date')
.call(yAxis);
var g = main.append("svg:g");
g.selectAll("scatter-dots")
.data(data)
.enter().append("svg:circle")
.attr("cx", function (d, i) {
return x(d[0]);
})
.attr("cy", function (d) {
return y(d[1]);
})
.attr("r", 5)
.style("fill", function (d) { return color(d[0]);}) ;
// begin of drawing lines
var line = d3.svg.line()
.x(function(d){return x(d[0]);})
.y(function(d){return y(d[1]);})
.interpolate("linear");
g.append("path")
.attr("d", function(d) { return line(data)})
.attr("transform", "translate(0,0)")
.style("stroke-width", 2)
.style("stroke", "steelblue")
.style("fill", "none");
// end of drawing lines
main.append("g")
.attr("class", "grid")
.attr("transform", "translate(0," + height + ")")
.call(make_x_axis()
.tickSize(-height, 0, 0)
.tickFormat(""))
main.append("g")
.attr("class", "grid")
.call(make_y_axis()
.tickSize(-width, 0, 0)
.tickFormat(""))
function make_x_axis() {
return d3.svg.axis()
.scale(x)
.orient("bottom")
.ticks(30)
}
function make_y_axis() {
return d3.svg.axis()
.scale(y)
.orient("left")
.ticks(17)
}
在这个例子中，如何将x轴标记为x1，x2，x3 .....等等，而不是0,1,2，...和y- axis as y1，y2，y3 .... so on instead to 0,1,2，？
In this example how to label the x-axis as x1,x2,x3..... so on instead of 0,1,2,...and y-axis as y1,y2,y3.... so on instead of 0,1,2,?
推荐答案
axis.tickFormat 定义一个简单的自定义格式化程序。下面是x轴的示例：
You could use axis.tickFormat to define a simple custom formatter. Here's an example for the x axis:
axis.tickFormat(function(d) {
return "x" + d;
});
这篇关于用字母数字字符标记轴的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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