我有一些数据通过API看作是一个JSON字符串,如下所示:
someData1: {0: {_id: {date: "2015-11-11"}, count: 1}, length: 1}
0: {_id: {date: "2015-11-11"}, count: 1}
_id: {date: "2015-11-11"}
date: "2015-11-11"
count: 1
length: 1
someData2: {0: {_id: {date: "2015-11-12"}, count: 5}, 1: {_id: {date: "2015-11-11"}, count: 3}, length: 2}
0: {_id: {date: "2015-11-12"}, count: 5}
_id: {date: "2015-11-12"}
count: 5
1: {_id: {date: "2015-11-11"}, count: 3}
_id: {date: "2015-11-11"}
date: "2015-11-11"
count: 3
length: 2
someDataN: ...
但是,我需要将这些数据显示在Google图表中(确切地说是区域图表)。
根据我的理解,在Google图表中,第一列可以是日期/字符串,其余的必须是数字,因此我无法格式化数据以使其可用于Google图表
因此,在我的情况下,someData1
和someData2
必须是列,基本上在第一个date
列之后。
所以列将是:[date, someData1, someData2]
在这种情况下设置列很容易,但设置行是让我感到困惑的原因。如何确保someData1
的计数位于 someData1 列之下,依此类推?
如何重组此对象以使其符合我的需要?
谢谢。
答案 0 :(得分:1)
我写了一个javascript函数来做这件事:
var GenerateChart = function(element, columns, data, title, type) {
var dataArr = [];
for (var i = 0; i < data.length; i++) {
var cell = [];
for (var n = 0; n < data[i].length; n++) {
if (n === 0) {
cell.push(data[i][n]);
} else {
cell.push(parseInt(data[i][n], 10));
}
}
dataArr.push(cell);
}
var data = new google.visualization.DataTable();
for (var i = 0; i < columns.length; i++) {
if (i === 0) {
data.addColumn('string', columns[i].label);
} else {
data.addColumn('number', columns[i].label);
}
}
data.addRows(dataArr);
var options;
var chart;
switch (type) {
case 'line':
options = {
title: title,
curveType: 'function',
legend: {
position: 'bottom'
}
}
chart = new google.visualization.LineChart(element);
break;
case 'bar':
options = {
title: title,
trendlines: {
0: {}
},
legend: {
position: 'bottom'
},
}
chart = new google.visualization.ColumnChart(element);
break;
case 'pie':
options = {
title: title
}
chart = new google.visualization.PieChart(element);
break;
case 'bubble':
var hAxis;
var vAxis;
for (var i = 0; i < 3; i++) {
if (i === 1) {
hAxis = columns[i].label;
} else if (i === 2) {
vAxis = columns[i].label;
}
}
options = {
title: title,
hAxis: hAxis,
vAxis: vAxis,
buble: {
textStyle: {
fontSize: 11
}
}
}
chart = new google.visualization.BubbleChart(element);
break;
}
chart.draw(data, options);
}
您只需要在switch语句中添加'area'大小写。但是,他们的大多数图表都使用非常相似的json结构。您可以像上面这样调用上面的函数:
var element = document.getElementById('graph');
var columns = result[key].columns;
var data = result[key].data;
GenerateChart(element, columns, data, "Graph Title", "area");
上面的'result'变量将是你的json对象。我将简要介绍一下我将用于上述函数的json对象的示例。条形图示例:
{
"title":"Feeds Today",
"type":"bar",
"columns":[
{"label":"Feed Type"},
{"label":"Successes"},
{"label":"Fails"}],
"data":[
["ListHub","507",2],
["Reliance","270",0],
["Realogy","88",0],
["DDF","36",0],
["RETS","231",7],
["IDX","23",0],
["XML","26",3]]
}