问题描述
我正在尝试获取stackedBar的所有值的总和,并将其总计包含在工具提示中。
var barChartData = {
标签:[[ January, February, March, April, May, June, July],
数据集:[{
标签:'Corporation 1',
backgroundColor: rgba(220,220,220,0.5),
数据:[50,40,23,45,67,78,23]
},{
标签:'公司2',
背景颜色: rgba(151,187,205,0.5),
数据:[50,40,78,23,23,45,67]
},{
标签:公司3,
背景颜色: rgba(151,187,205,0.5),
数据:[50,67,78,23,40,23,55]
}]
};
window.onload = function(){
var ctx = document.getElementById( canvas)。getContext( 2d);
window.myBar = new Chart(ctx,{
type:'bar',
data:barChartData,
选项:{
标题:{
display:true,
文本: Chart.js条形图-堆叠
},
工具提示:{
模式:'label',
回调:{
标签:function(tooltipItem,data){
var corporation = data.datasets [tooltipItem.datasetIndex] .label;
var valor = data.datasets [tooltipItem.datasetIndex] .data [tooltipItem。 index];
var total = eval(data.datasets [tooltipItem.datasetIndex] .data.join( +));
return total +- + corporation +:$ +勇气.toFixed(2).replace(/(\d)(?=(\d {3})+ \。)/ g,'$ 1,');
}
}
},
个响应ive:true,
标度:{
xAxes:[{
stacked:true,
}],
yAxes:[{
stacked:true
}]
}
}
});
};
现在 total
是每个数据集的总和,我需要每个stackedBar的总和。
示例
标签A:值A
标签B:价值B
标签C:价值C
总计:值A +值B +值C
是否有可能获得总价值?
感谢伊达利亚
首先,您应该知道,如果在回调中返回数组而不是单个字符串
,它会显示数组中的所有字符串,就好像它是不同的数据集一样(请参见
I'm trying to get the sum of all values of a stackedBar and include this total in tooltip.
var barChartData = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [{
label: 'Corporation 1',
backgroundColor: "rgba(220,220,220,0.5)",
data: [50, 40, 23, 45, 67, 78, 23]
}, {
label: 'Corporation 2',
backgroundColor: "rgba(151,187,205,0.5)",
data: [50, 40, 78, 23, 23, 45, 67]
}, {
label: 'Corporation 3',
backgroundColor: "rgba(151,187,205,0.5)",
data: [50, 67, 78, 23, 40, 23, 55]
}]
};
window.onload = function() {
var ctx = document.getElementById("canvas").getContext("2d");
window.myBar = new Chart(ctx, {
type: 'bar',
data: barChartData,
options: {
title:{
display:true,
text:"Chart.js Bar Chart - Stacked"
},
tooltips: {
mode: 'label',
callbacks: {
label: function(tooltipItem, data) {
var corporation = data.datasets[tooltipItem.datasetIndex].label;
var valor = data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];
var total = eval(data.datasets[tooltipItem.datasetIndex].data.join("+"));
return total+"--"+ corporation +": $" + valor.toFixed(2).replace(/(\d)(?=(\d{3})+\.)/g, '$1,');
}
}
},
responsive: true,
scales: {
xAxes: [{
stacked: true,
}],
yAxes: [{
stacked: true
}]
}
}
});
};
Now total
is the sum per dataset and I need the sum per stackedBar.
Example
Label A: value A
Label B: value B
Label C: value C
TOTAL: value A + value B + value C
It is possible to get that total value?
Thanks, Idalia.
First you should know that if you return an array instead of a single string in the callback
of the tooltip, it will display all the strings in your array as if it were different datasets (see this answer for more details).
So I edited a little bit your callback to the following:
callbacks: {
label: function(tooltipItem, data) {
var corporation = data.datasets[tooltipItem.datasetIndex].label;
var valor = data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];
// Loop through all datasets to get the actual total of the index
var total = 0;
for (var i = 0; i < data.datasets.length; i++)
total += data.datasets[i].data[tooltipItem.index];
// If it is not the last dataset, you display it as you usually do
if (tooltipItem.datasetIndex != data.datasets.length - 1) {
return corporation + " : $" + valor.toFixed(2).replace(/(\d)(?=(\d{3})+\.)/g, '$1,');
} else { // .. else, you display the dataset and the total, using an array
return [corporation + " : $" + valor.toFixed(2).replace(/(\d)(?=(\d{3})+\.)/g, '$1,'), "Total : $" + total];
}
}
}
You can see the full code in this jsFiddle, and here is its result :
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