[英]Preparing dynamic data for displaying via Google Chart API
我通過一個API將大量數據作為JSON字符串輸入,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,我需要將此數據顯示在Google圖表中(確切地是面積圖)。
據我了解,在Google圖表中,第一列可以是日期/字符串,而其余列必須是數字,因此我在格式化數據時遇到麻煩,無法使其可用於Google圖表。
因此,在我的情況下, someData1
和someData2
必須是列,基本上在第一個date
列之后。
因此,列將為: [date, someData1, someData2]
在這種情況下設置列很容易,但是設置行卻讓我感到困惑。 如何確定someData1
的計數在someData1列下,依此類推?
如何重組該對象以使其適合我的需求?
謝謝。
我編寫了一個javascript函數來完成此操作:
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語句中添加一個“ area”大小寫即可。 但是,他們的大多數圖形都使用非常相似的json結構進行處理。 您可以像上面這樣調用該函數:
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“結果”變量將是您的json對象。 我將在上面簡短介紹一個將用於上述功能的json對象的示例。 條形圖示例:
{
"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]]
}
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