我有一个看起来像这样的数据集
entity,code,year,value
Afghanistan,AFG,1990,10.31850413
Afghanistan,1991,10.32701045
Albania,ALB,3.985169898
Albania,4.199006705
我想绘制带有D3.js的折线图,但仅适用于代码为“ AFG”的国家/地区。 x轴将是1990年至2017年的年份,y轴是值。目前,我的代码覆盖所有国家/地区,因此创建了包含一百多条重叠线的折线图。如何更改此代码以使其采用指定的值:
// set the dimensions and margins of the graph
var margin = {top: 10,right: 30,bottom: 30,left: 60},width = 560 - margin.left - margin.right,height = 400 - margin.top - margin.bottom;
// append the svg object to the body of the page
var svg2 = d3.select("#linechart")
.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 + ")");
//Read the data
d3.csv("./files/suicide-death-rates.csv",// Now I can use this dataset:
function(data) {
// Add X axis --> it is a date format
var x = d3.scaleLinear()
.domain(d3.extent(data,function(d) { return d.year; }))
.range([ 0,width ]);
svg2.append("g")
.attr("transform","translate(0," + height + ")")
.call(d3.axisBottom(x));
// Add Y axis
var y = d3.scaleLinear()
.domain([0,d3.max(data,function(d) { return +d.value; })])
.range([ height,0 ]);
svg2.append("g")
.call(d3.axisLeft(y));
// Add the line
svg2.append("path")
.datum(data)
.attr("fill","none")
.attr("stroke","steelblue")
.attr("stroke-width",1.5)
.attr("d",d3.line()
.x(function(d) { return x(d.year) })
.y(function(d) { return y(d.value) })
)
})
谢谢!