我正在创建一个 Chart.js 条形图，如下所示:
HTML
<canvas id="priceComplianceBarChart" width="540" height="360"></canvas>
JQUERY
var barChartData = {
labels: ["Bix Produce", "Capitol City", "Charlies Portland", "Costa Fruit and Produce", "Get Fresh Sales", "Loffredo East", "Loffredo West", "Paragon", "Piazza Produce"],
datasets: [
{
fillColor: "rgba(220,220,220,0.5)",
strokeColor: "rgba(220,220,220,0.8)",
highlightFill: "rgba(220,220,220,0.75)",
highlightStroke: "rgba(220,220,220,1)",
data: [17724, 5565, 3806, 5925, 5721, 6635, 14080, 9027, 25553]
},
{
fillColor: "rgba(151,187,205,0.5)",
strokeColor: "rgba(151,187,205,0.8)",
highlightFill: "rgba(151,187,205,0.75)",
highlightStroke: "rgba(151,187,205,1)",
data: [17, 1, 18, 14, 3, 1, 5, 10, 1]
}
]
}
var ctxBarChart = document.getElementById("priceComplianceBarChart").getContext("2d");
var myBarChart = new Chart(ctxBarChart).Bar(barChartData);
这会生成一个如下所示的图表:
将 val 附加到条形图下方的图例标签上，我确信我自己可以弄清楚，但是如何将两个值堆叠到一个条形图上，以及如何将标签添加到条形图上 - 我没有想法如何实现这些目标。
更新
我正在尝试 Sergiu M 的代码，但一定是做错了什么，因为我应该显示图表的 div 现在完全是空白的。这是我的新代码:
HTML
<div class="topright">
<h2 class="sectiontext">Price Compliance</h2>
<div class="graph_container">
<canvas id="priceComplianceBarChart" width="400" height="400"></canvas>
</div>
</div>
CSS
.topright {
margin-top: -4px;
margin-right: 16px;
margin-bottom: 16px;
margin-left: -12px;
padding: 16px;
border: 1px solid black;
}
.sectiontext {
font-size: 1.5em;
font-weight: bold;
font-family: Candara, Calibri, Cambria, serif;
color: green;
margin-top: -4px;
}
JQUERY
var ctxBarChart = document.getElementById("priceComplianceBarChart").getContext("2d");
var priceBarChart = new Chart(ctxBarChart, {
type: 'bar',
data: {
labels: ["Bix Produce", "Capitol City", "Charlies Portland", "Costa Fruit and Produce", "Get Fresh Sales", "Loffredo East", "Loffredo West", "Paragon", "Piazza Produce"],
datasets: [{
label: 'Some Values',
backgroundColor: 'rgba(97, 188, 109, 0.2)',
borderColor: 'rgba(97, 188, 109, .8)',
data: [7000, 5565, 3806, 5925, 5721, 6635, 14080, 9027, 25553]
//data: [17724, 2565, 1506, 3625, 3721, 4635, 7080, 4027, 12553]
}, {
label: 'Other Values',
backgroundColor: 'rgba(236, 107, 86, 0.2)',
borderColor: 'rgba(236, 107, 86, .8)',
data: [17724, 2565, 1506, 3625, 3721, 4635, 7080, 4027, 12553]
//data: [17, 1, 18, 14, 3, 1, 5, 10, 1]
}]
},
options: {
tooltips: {
enabled: false
},
animation: {
duration: 0,
onComplete: function () {
if (this.data.datasets.length === 2) {
// render the value of the chart above the bar
var ctx = this.chart.ctx;
ctx.font = Chart.helpers.fontString(Chart.defaults.global.defaultFontSize, 'normal', Chart.defaults.global.defaultFontFamily);
ctx.fillStyle = this.chart.config.options.defaultFontColor;
ctx.textAlign = 'center';
ctx.textBaseline = 'bottom';
var firstDataSet = this.data.datasets[0];
var secondDataSet = this.data.datasets[1];
if (firstDataSet.length === secondDataSet.length) {
for (var i = 0; i < firstDataSet.data.length; i++) {
var firstModel = firstDataSet._meta[Object.keys(firstDataSet._meta)[0]].data[i]._model;
var secondModel = secondDataSet._meta[Object.keys(secondDataSet._meta)[0]].data[i]._model;
var total = firstDataSet.data[i] + secondDataSet.data[i];
if (firstDataSet.data[i] >= secondDataSet.data[i]) {
ctx.fillText((firstDataSet.data[i] * 100 / total).toFixed(2) + '%', firstModel.x, firstModel.y + 30);
} else {
ctx.fillText((secondDataSet.data[i] * 100 / total).toFixed(2) + '%', secondModel.x, secondModel.y + 30);
}
}
}
}
}
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true
},
stacked: true
}],
xAxes: [{
stacked: true,
}]
}
}
});
最佳答案
为了使用图表js实现堆叠条形图，您可以使用此代码http://codepen.io/anon/pen/ozzyJy 。我已将第二个数据值数组替换为一些更大的值，以说明堆叠条形图，但它适用于任何值:
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Bix Produce", "Capitol City", "Charlies Portland", "Costa Fruit and Produce", "Get Fresh Sales", "Loffredo East", "Loffredo West", "Paragon", "Piazza Produce"],
datasets: [{
backgroundColor: 'rgba(97, 188, 109, 0.2)',
borderColor: 'rgba(97, 188, 109, .8)',
data: [7000, 5565, 3806, 5925, 5721, 6635, 14080, 9027, 25553]
}, {
backgroundColor: 'rgba(236, 107, 86, 0.2)',
borderColor: 'rgba(236, 107, 86, .8)',
data: [17724, 2565, 1506, 3625, 3721, 4635, 7080, 4027, 12553]
//data: [17, 1, 18, 14, 3, 1, 5, 10, 1]
}]
},
options: {
tooltips: {
enabled: false
},
animation: {
duration: 0,
onComplete: function() {
if (this.data.datasets.length === 2) {
var ctx = this.chart.ctx;
ctx.font = Chart.helpers.fontString(Chart.defaults.global.defaultFontSize, 'normal', Chart.defaults.global.defaultFontFamily);
ctx.fillStyle = this.chart.config.options.defaultFontColor;
ctx.textAlign = 'center';
ctx.textBaseline = 'bottom';
var firstDataSet = this.data.datasets[0];
var secondDataSet = this.data.datasets[1];
if (firstDataSet.length === secondDataSet.length) {
for (var i = 0; i < firstDataSet.data.length; i++) {
var firstModel = firstDataSet._meta[Object.keys(firstDataSet._meta)[0]].data[i]._model;
var secondModel = secondDataSet._meta[Object.keys(secondDataSet._meta)[0]].data[i]._model;
var total = firstDataSet.data[i] + secondDataSet.data[i];
if (firstDataSet.data[i] >= secondDataSet.data[i]) {
ctx.fillText((firstDataSet.data[i] * 100 / total).toFixed(2) + '%', firstModel.x, firstModel.y + 30);
}else{
ctx.fillText((secondDataSet.data[i] * 100 / total).toFixed(2) + '%', secondModel.x, secondModel.y + 30);
}
}
}
}
}
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true
},
stacked: true
}],
xAxes: [{
stacked: true,
}]
}
}
});
关于javascript - 如何让 Chart.JS 条形图将每个条形上的两个数据值堆叠在一起，并在每个条形上打印计算值？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39540184/