如何将x轴更改为DD-MM-YY之类的日期值?我的JSON数据如下: 无论如何,我是否更改了x轴,以便它为我的文件中的每个JSON数据显示DD-MM-YY?我尝试使用%m /%d /%y但它不起作用我尝试使用%Y-%m-%d,但我的x轴显示的值不是%Y-%m-%d格式。那么,我怎么能够解决这个问题,以便我的x轴相应地显示日期值,或者我将如何更改我的JSON数据以便能够读取我的值?
ebolamortality.json
[{"日期":" 063014"" guineacase":" 3"" guineadeath&#34 ;: " 5""利比里亚: 案例":" 8","利比里亚:死亡":" 7","塞拉利昂:案例":" 11""塞拉利昂 Leone:Death":" 2","尼日利亚:案例":" 0","尼日利亚:死亡":&#34 ; 0","总案例 (西非)":" 22","死亡总数(西非)":" 14","累积 案例":" 22","累计死亡":" 14"}, {"日期":" 070214"" guineacase":" 0"" guineadeath":" 2""利比里亚: 案例":" 8","利比里亚:死亡":" 10","塞拉利昂:案例":" 13""塞拉利昂 Leone:Death":" 2","尼日利亚:案例":" 0","尼日利亚:死亡":&#34 ; 0","总案例 (西非)":" 21","死亡总数(西非)":" 14","累积 案例":" 33","累计死亡":" 28"}]
我当前的网页
<html>
<head>
</head>
<body>
<div id="chart1">
<h4> Ebola New Cases</h4>
</div>
</body>
<style>
body {
font: 10px sans-serif;
}
.hover {
text-align: center;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: black ;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
h4 {
text-align: center;
}
.d3-tip {
line-height: 1;
font-weight: bold;
padding: 12px;
background: rgba(0, 0, 0, 0.8);
color: #fff;
border-radius: 2px;
}
#chart1 {
position: relative;
border-style: solid;
border-width: 2px;
border-color: #CCC;
border-collapse: collapse;
height: 280px;
width: 500px;
float: left;
}
</style>
<script src="http://d3js.org/d3.v3.js"></script>
<script src="http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script>
<script>
var margin = { top: 30, right: 70, bottom: 30, left: 50 },
width = 400 - margin.left - margin.right,
height = 270 - margin.top - margin.bottom;
var tip = d3.tip()
.attr('class', 'd3-tip')
.offset([-10, 0])
.html(function(d) {
return "<p class='hover'>Male</p> </br> <strong>Age:</strong> <span style='color:white'>" + d.age + "</br><strong>Life Expectancy:</strong> <span style='color:white'>" + d.lifeexpectancymale + "%" + "</span></br><strong>World Rank:</strong> <span style='color:white'>" + d.worldrankmale;
});
var tip1 = d3.tip()
.attr('class', 'd3-tip')
.offset([-10, 0])
.html(function(d) {
return "<p class='hover'>Female</p> <strong>Age:</strong> <span style='color:white'>" + d.age + "</br><strong>Life Expectancy:</strong> <span style='color:white'>" + d.lifeexpectancyfemale + "%" + "</span></br><strong>World Rank:</strong> <span style='color:white'>" + d.worldrankfemale;
});
var parseDate = d3.time.format("%d-%b-%y").parse;
var x = d3.scale.linear()
.range([0, width]);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom").ticks(5);
var yAxis = d3.svg.axis()
.scale(y)
.orient("left").ticks(5);
var line = d3.svg.line()
.x(function (d) { return x(d.date); })
.y(function (d) { return y(d.guineacase); });
var line2 = d3.svg.line()
.x(function (d) { return x(d.date); })
.y(function (d) { return y(d.guineadeath); });
var svg = d3.select("#chart1").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 + ")");
svg.call(tip).call(tip1);
d3.json("ebolamortality.json", function (error, data) {
data.forEach(function (d)
{
d.date = parseDate(d.date.toString());
d.guineacase = +d.guineacase;
d.guineadeath = +d.guineadeath;
});
x.domain(d3.extent(data, function (d) {
return d.date;
}));
/* Changed the y-axis range */
y.domain([d3.min(data, function (d) { return(d.guineacase)}), d3.max(data, function (d) { return(d.guineadeath)})]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("text") // text label for the x axis
.attr("x", 155)
.attr("y", 235)
.style("text-anchor", "middle")
.text("Date");
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("Guinea");
svg.append("path")
.datum(data)
.attr("class", "line")
.style("stroke", "red")
.attr("d", line(data));
svg.append("path")
.datum(data)
.attr("class", "line")
.style("stroke", "black")
.attr("d", line2(data));
svg.selectAll('.yaxis1')
.data(data)
.enter()
.append('circle')
.attr('class', 'yaxis1')
.attr('cx', function (datum) {
return x(datum.date)
})
.attr('cy', function (datum) {
return y(datum.guineacase)
})
.attr('r', 3)
.attr('fill', 'red')
.on('mouseover', tip.show)
.on('mouseout', tip.hide);
svg.selectAll('.yaxis2')
.data(data)
.enter()
.append('circle')
.attr('class', 'yaxis2')
.attr('cx', function (datum) {
return x(datum.date)
})
.attr('cy', function (datum) {
return y(datum.guineadeath)
})
.attr('r', 3)
.attr('fill', 'black')
.on('mouseover', tip1.show)
.on('mouseout', tip1.hide);
});
</script>
</html>
答案 0 :(得分:1)
以下为您提供x轴上所需的DD-MM-YY输出格式。结果是最终结果,但我相信你可以弄清楚如何解决这个问题。
var outFormat = d3.time.format("%d-%m-%y");
var xAxis = d3.svg.axis().scale(x).orient("bottom").ticks(5).tickFormat(outFormat);
关键是使用适当的 d3.time.format 设置 tickFormat 。 您的示例代码的parseDate也不适用于所提供的JSON。这很有效。
var parseDate = d3.time.format("%d%m%y").parse;