例如,在以下位置考虑序数条形图的dc.js示例：

https://github.com/dc-js/dc.js/blob/master/web/examples/ord.html

如何按水果计数的降序对x轴进行排序？

这是我尝试过的：(jsfiddle：http://jsfiddle.net/gautam/re9r9kk7/)

var counts = [
  {name: "apple",cnt: 10},{name: "orange",cnt: 15},{name: "banana",cnt: 12},{name: "grapefruit",cnt: 2},cnt: 4}
];

var ndx            = crossfilter(counts),fruitDimension = ndx.dimension(function(d) {return d.name;}),sumGroup       = fruitDimension.group().reduceSum(function(d) {return d.cnt;});

chart
  .width(768)
  .height(380)
  .x(d3.scale.ordinal())
  .xUnits(dc.units.ordinal)
  .brushOn(false)
  .xAxisLabel("Fruit")
  .yAxisLabel("Quantity Sold")
  .dimension(fruitDimension)
  .barPadding(0.1)
  .outerPadding(0.05)
  .group(sumGroup);