Cannot read property 'linear' of

原始写法

var linear = d3.scale.linear()
       .domain([0, d3.max(dataset)])
       .range([0, 250]);

In D3 v4 it is no longer named d3.scale.linear().Use d3.scaleLinear() instead.

原因是写法被scaleLinear()代替了

正确写法

    var linear = d3.scaleLinear()
       .domain([0, d3.max(dataset)])
       .range([0, 250]);