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VisualizaçõesHow to use excess vertical space in stacked bar chart?
I am trying to create a stacked bar chart (with chart.js 3.7+) which uses the entire canvas:
new Chart(..., {
type: 'bar',
data: {
labels: ['a','b','c','d','e'],
datasets: [{
backgroundColor: '#ff00ff',
data: [20,40,60,40,20],
},{
backgroundColor: '#00ff00',
data: [100,200,300,200,100],
}]
},
options: {
maintainAspectRatio: false,
responsive: true,
plugins: {
legend: { display: false },
},
scales: {
x: {
display: false,
stacked: true
},
y: {
display: true,
stacked: true
}
}
}
});
When I use a normal bar chart the graph is stretched to use up all the vertical space:
But when I stack the bars the combined longest bar doesn't use up all the vertical space:
How can I get the stacked bar chart to stretch to use all available vertical space?
See example here.
·
Juan Pablo Isaza
2 Respostas
Responde à pergunta0
You could sum your arrays, find the max value in the resulting array and set the options.scales.y.max property with this value :
let data1 = [20,40,60,40,20];
let data2 = [100,200,300,200,100];
let sum = data1.map(function (num, idx) {
return num + data2[idx];
});
let max = Math.max(...sum);
var options =
{
maintainAspectRatio: false,
responsive: true,
plugins: {
legend: { display: false },
},
scales: {
x: {
display: false,
stacked: true
},
y: {
display: true,
stacked: true,
max: max
}
}
};
var mychart = new Chart(document.getElementById('mycanvas2').getContext('2d'), {
type: 'bar',
data: {
labels: ['a','b','c','d','e'],
datasets: [{
backgroundColor: '#ff00ff',
data: data1
},{
backgroundColor: '#00ff00',
data: data2
}]
},
options: options
});<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.7.0/chart.min.js"></script>
<div style="width:400px; height: 200px">
<canvas id="mycanvas2"></canvas>
</div>
·
Juan Pablo Isaza
Relatório
Responde à pergunta