如何计算 nvd3.js 堆积面积图中的输入数据

Question

伙计们，我正在尝试使用 nvd3.js 和 angular.js 实现堆积面积图，输入数据如下，

{ 
      "key" : "North America" , 
      "values" : [ [ 1025409600000 , 23.041422681023] , [ 1028088000000 , 19.854291255832],
       [ 1030766400000 , 21.02286281168], 
       [ 1033358400000 , 22.093608385173],
       [ 1036040400000 , 25.108079299458],
       [ 1038632400000 , 26.982389242348]]
}

我看不懂这个数据代表什么。特别是 X 轴数据，它从下面的数据中获取日期值，但我无法弄清楚。任何帮助都会很棒。原始代码的link如下 http://nvd3.org/examples/stackedArea.html

Answer 1

以上数据中，

{ 
      "key" : "North America" , 
      "values" : [ [ 1025409600000 , 23.041422681023] , [ 1028088000000 , 19.854291255832],
       [ 1030766400000 , 21.02286281168], 
       [ 1033358400000 , 22.093608385173],
       [ 1036040400000 , 25.108079299458],
       [ 1038632400000 , 26.982389242348]]
}

It shows one series of a stack bar chart. Where Key Indicates the Series Name and The Values indicates the Stack, if you take the first value 1025409600000 is the Date (Here its timestamp) and 19.854291255832 is the y axis value. Similarly it goes on, You can have more series with different stacks.

您可以在此处查看 FullStack 数据。