使用Google Charts自动合并值

Question

I currently have a dataset called test.csv with the columns: 我目前有一个名为test.csv的数据集，其中包含以下列：

location time

It consists of a number of records, which may be for the same location. 它由许多记录组成，这些记录可能位于同一位置。 ie. 即。 there may be two records where the location is Paris but the time is different and I wish to add them and then plot them as one. 可能有两个记录，其中位置是巴黎，但时间不同，我希望添加它们，然后将它们绘制为一个。

I wish to combine the values of time for all where the value of location is the same when plotting to a bar chart using Google Chart. 我希望在使用Google Chart绘制条形图时，将所有位置值相同的时间值组合起来。 Currently I have written this, but am unsure how to continue: 目前我写了这个，但不确定如何继续：

<!DOCTYPE html>
 <head>
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <meta name="HandheldFriendly" content="True">
 <meta name="MobileOptimized" content="320">

 <title>Google Graph and CSV</title>
 <meta name="description" content="test">

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
 <script src="jquery.csv.min.js"></script>
 <script type="text/javascript" src="https://www.google.com/jsapi"></script>

<script type="text/javascript"> // load the visualisation API
  google.load('visualization', '1', { packages: ['corechart', 'controls'] });
</script>

<script type="text/javascript">
function drawVisualization() {
   $.get("test.csv", function(csvString) {
      var arrayData = $.csv.toArrays(csvString, {onParseValue: $.csv.hooks.castToScalar});
      var data = new google.visualization.arrayToDataTable(arrayData);
      var crt_ertdlyYY = new google.visualization.ChartWrapper({
         chartType: 'BarChart',
         containerId: 'crt_ertdlyYY',
         dataTable: data,
         options:{
            title: 'Room Occupancy for',
            titleTextStyle : {color: 'grey', fontSize: 16},
            bar: {groupWidth: "95%"},
            legend: { position: "none" },
            width:400,
            height:600,
         }
      });
      crt_ertdlyYY.draw();
   });
}
google.setOnLoadCallback(drawVisualization)
</script>

<div id="crt_ertdlyYY"></div>

This produces the following visualisation: Output of code 这会产生以下可视化：代码输出

Answer 1

use the group() method to aggregate the total for each location 使用group（）方法聚合每个位置的总计

var aggData = google.visualization.data.group(
  data,
  [0],
  [{
    column: 1,
    aggregation: google.visualization.data.sum,
    type: 'number',
    label: 'Total'
  }]
);

then use the grouped data on the chart 然后使用图表上的分组数据

var crt_ertdlyYY = new google.visualization.ChartWrapper({
   chartType: 'BarChart',
   containerId: 'crt_ertdlyYY',
   dataTable: aggData,  // <-- use agg data
   options:{
      title: 'Room Occupancy for',
      titleTextStyle : {color: 'grey', fontSize: 16},
      bar: {groupWidth: "95%"},
      legend: { position: "none" },
      width:400,
      height:600,
   }
});

EDIT 编辑

a modifier function can be used to combine locations with different cases modifier函数可用于组合具有不同情况的位置

var aggData = google.visualization.data.group(
  data,
  [{
    column: 0,
    modifier: function (value) {
      return value.toUpperCase();
    },
    type: 'string',
    label: 'Location'
  }],
  [{
    column: 1,
    aggregation: google.visualization.data.sum,
    type: 'number',
    label: 'Total'
  }]
);

使用Google Charts自动合并值

问题描述

1 个解决方案

解决方案1
0 已采纳 2016-11-26 13:50:53

使用Google Charts自动合并值

问题描述

1 个解决方案

解决方案1 0 已采纳 2016-11-26 13:50:53

解决方案1
0 已采纳 2016-11-26 13:50:53