d3.js指定x轴的文本

Question

我的x轴目前有编号的刻度.我希望将ticks替换为来自我对象的数据(特别是关键字值).我怎么做到这一点？

我有一个工作小提琴

var dataset = [
            {"keyword": "payday loans", "global": 1400000, "local": 673000, "cpc": "14.11"},
            {"keyword": "title loans", "global": 165000, "local": 160000, "cpc": "12.53" },
            {"keyword": "personal loans", "global": 550000, "local": 301000, "cpc": "6.14"},
            {"keyword": "online personal loans", "global": 15400, "local": 12900, "cpc": "5.84"},
            {"keyword": "online title loans", "global": 111600, "local": 11500, "cpc": "11.74"}
        ];

var xAxis = d3.svg.axis()
    .scale(xScale)
    .orient("bottom");
// xAxis
svg.append("g") // Add the X Axis
    .attr("class", "x axis")
    .attr("transform", "translate(0," + (h) + ")")
    .call(xAxis);
//xAxis Label
svg.append("text") 
    .attr("transform", "translate(" + (w / 2) + " ," + (h + margin.bottom - 5) +")")
    .style("text-anchor", "middle")
    .text("Keyword");

Answer 1

实现此目的的最简单方法是tickFormat为轴设置功能:

var xAxis = d3.svg.axis()
    .scale(xScale)
    .tickFormat(function(d) { return dataset[d].keyword; })
    .orient("bottom");

您可能需要稍微调整宽度以适合标签(或旋转它们).

执行此操作的"正确"方法是将域值指定xScale为关键字而不是数组索引.然后你必须改变所有其他使用的代码xScale.