NVD3离散柱状图与Json

NVD3 Discrete BarChart With Json

本文关键字：Json NVD3 更新时间：2023-09-26

我试图将json文件放入NVD3条形图，但我无法做我想做的。我不太懂JS，但在学校的期末项目中尝试学习，所以请帮助=]

下面是我从一个例子中得到的代码:

<!DOCTYPE html> <meta charset="utf-8">
<link href="../src/nv.d3.css" rel="stylesheet" type="text/css">
<style>
body {   overflow-y:scroll; }
text {   font: 12px sans-serif; }
svg {   display: block; }
#chart1 svg{   height: 500px;   min-width: 100px;   min-height: 100px; /*   margin: 10px;   Minimum height and width is a good idea to prevent negative SVG dimensions...   For example width should be =< margin.left + margin.right + 1,   of course 1 pixel for the entire chart would not be very useful, BUT should not have errors
*/ }
</style> <body>
  <div id="chart1">
    <svg></svg>   </div>
<script src="../lib/d3.v3.js"></script> <script src="../nv.d3.js"></script> <!-- including all the components so I don't have to minify every time I test in development --> <script src="../src/tooltip.js"></script> <script src="../src/utils.js"></script> <script src="../src/models/axis.js"></script> <script src="../src/models/discreteBar.js"></script> <script src="../src/models/discreteBarChart.js"></script> <script>


historicalBarChart = [    {
    key: "Cumulative Return",
    values: [
      { 
        "label" : "A" ,
        "value" : 29.765957771107
      } , 
      { 
        "label" : "B" , 
        "value" : 0
      } , 
      { 
        "label" : "C" , 
        "value" : 32.807804682612
      } , 
      { 
        "label" : "D" , 
        "value" : 196.45946739256
      } , 
      { 
        "label" : "E" ,
        "value" : 0.19434030906893
      } , 
      { 
        "label" : "F" , 
        "value" : 98.079782601442
      } , 
      { 
        "label" : "G" , 
        "value" : 13.925743130903
      } , 
      { 
        "label" : "H" , 
        "value" : 5.1387322875705
      }
    ]   } ];


nv.addGraph(function() {     var chart = nv.models.discreteBarChart()
      .x(function(d) { return d.label })
      .y(function(d) { return d.value })
      .staggerLabels(true)
      //.staggerLabels(historicalBarChart[0].values.length > 8)
      .tooltips(false)
      .showValues(true)
      .transitionDuration(250)
      ;
  d3.select('#chart1 svg')
      .datum(historicalBarChart)
      .call(chart);
  nv.utils.windowResize(chart.update);
  return chart; });

</script>

我的问题在这里:

historicalBarChart = [ 
  {
    key: "Cumulative Return",
    values: [
      { 
        "label" : "A" ,
        "value" : 29.765957771107
      } , 
      { 
        "label" : "B" , 
        "value" : 0
      } , 
      { 
        "label" : "C" , 
        "value" : 32.807804682612
      } , 
      { 
        "label" : "D" , 
        "value" : 196.45946739256
      } , 
      { 
        "label" : "E" ,
        "value" : 0.19434030906893
      } , 
      { 
        "label" : "F" , 
        "value" : 98.079782601442
      } , 
      { 
        "label" : "G" , 
        "value" : 13.925743130903
      } , 
      { 
        "label" : "H" , 
        "value" : 5.1387322875705
      }
    ]
  }
];

我想把Json值放在那里，怎么做呢?

这是我的Json文件，一个用于X轴，另一个用于Y轴:

X轴:

{"periodos"("112"、"121"、"122"、"131"、"132"、"141"]}

Y轴:

{"reprovados"("247"、"164"、"250"、"147"、"144"、"0"]}

如果有人能尽可能完整地回答我，我将非常感激=]

我不确定你需要什么样的图形，因为你说你想要不同维度的值。我创建了一个图表，所有的数据都在同一个维度上。我想它一定能满足你的需要。

演示

var json1 = {"periodos":["A","B","C","D","E","F","G","H","I"]};
var json2 = {"reprovados":["20","0","32.81","396.46","0.19","98.08","13.93","5.14","15.14"]};
var data = [{values: []}];
for(var i = 0; i < json1.periodos.length; i++){
  data[0].values.push({
    label: json1.periodos[i],
    value: Number(json2.reprovados[i])
  });
};
...
d3.select('#chart1 svg').datum(data)
...