d3.js爲x軸指定文本

Question

我的x軸當前有編號的刻度。我希望用我的對象中的數據（特別是關鍵字值）替換蜱。我怎麼做到這一點？

I have a working Fiddle

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

實現這一目標最簡單的方法是設置tickFormat功能，爲您的軸：

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

您可能需要調整的寬度有點適合標籤（或rotate them）。

完成此操作的「正確」方法是將xScale的域值指定爲關鍵字而不是數組索引。然後，您將不得不更改使用xScale的所有其他代碼。

Answer 2

這就是所謂的順序軸，退房the example from the creator