如何将 y 轴设置为 Chartjs 中的最大数据集值?
How to set y axis to the max dataset value in Chartjs?
这是一个非常快速的问题,但无论出于何种原因,我的图表将其最大 y 轴值设置为 100,即使数据在 50 左右结束。我不想为 y- 设置静态最大值轴,而是只让它停在最高数据点。
我是否缺少执行此操作的任何回调或选项?我的一些其他图表似乎按我想要的方式工作,但这个不是。
如有指点,将不胜感激!
编辑:
我看过一些使用 afterDataLimits
回调的帖子,但这似乎没有任何作用
我对此图表的选择是:
responsive: isResponsive.value,
maintainAspectRatio: false,
plugins: {
legend: {
display: legendIsShown.value,
position: 'top',
labels: {
font: {
size: responsiveFontsize.value - 2,
family: 'Inter',
weight: 'semibold',
},
color: '#4771FA',
pointStyle: 'circle',
usePointStyle: true,
boxWidth: 10,
boxHeight: 10,
},
},
tooltip: tooltipWhite,
datalabels: {
display: false,
},
},
layout: {
padding: {
left: 10,
right: 5,
top: 5,
bottom: 5,
},
},
scales: {
x: {
title: {
display: true,
text: 'Time (Seconds)',
color: '#4859AF',
font: {
size: responsiveFontsize.value + 2,
weight: 'semibold',
},
},
grid: {
color: '#ecedf6',
borderColor: '#4859AF',
borderWidth: 0,
display: true,
},
ticks: {
color: '#4859AF',
// maxTicksLimit: 0,
font: {
size: responsiveFontsize.value,
family: 'Inter',
},
},
},
y: {
// display: false
title: {
display: true,
text: 'Current (Ampere)',
color: '#4859AF',
font: {
size: responsiveFontsize.value + 2,
weight: 'semibold',
},
},
grid: {
color: '#ecedf6',
borderColor: '#4859AF',
borderWidth: 0,
display: true,
},
ticks: {
color: '#4859AF',
font: {
size: responsiveFontsize.value,
family: 'Inter',
},
},
},
},
您可以使用可编写脚本的函数来获得最大值 属性:
const options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderColor: 'orange'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'pink'
}
]
},
options: {
scales: {
y: {
max: (scale) => (
scale.chart.data.datasets.reduce((acc, curr) => {
const max = Math.max(...curr.data);
acc = max > acc ? max : acc;
return acc;
}, Number.MIN_SAFE_INTEGER))
}
}
}
}
const ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.7.1/chart.js"></script>
</body>
这是一个非常快速的问题,但无论出于何种原因,我的图表将其最大 y 轴值设置为 100,即使数据在 50 左右结束。我不想为 y- 设置静态最大值轴,而是只让它停在最高数据点。
我是否缺少执行此操作的任何回调或选项?我的一些其他图表似乎按我想要的方式工作,但这个不是。
如有指点,将不胜感激!
编辑:
我看过一些使用 afterDataLimits
回调的帖子,但这似乎没有任何作用
我对此图表的选择是:
responsive: isResponsive.value,
maintainAspectRatio: false,
plugins: {
legend: {
display: legendIsShown.value,
position: 'top',
labels: {
font: {
size: responsiveFontsize.value - 2,
family: 'Inter',
weight: 'semibold',
},
color: '#4771FA',
pointStyle: 'circle',
usePointStyle: true,
boxWidth: 10,
boxHeight: 10,
},
},
tooltip: tooltipWhite,
datalabels: {
display: false,
},
},
layout: {
padding: {
left: 10,
right: 5,
top: 5,
bottom: 5,
},
},
scales: {
x: {
title: {
display: true,
text: 'Time (Seconds)',
color: '#4859AF',
font: {
size: responsiveFontsize.value + 2,
weight: 'semibold',
},
},
grid: {
color: '#ecedf6',
borderColor: '#4859AF',
borderWidth: 0,
display: true,
},
ticks: {
color: '#4859AF',
// maxTicksLimit: 0,
font: {
size: responsiveFontsize.value,
family: 'Inter',
},
},
},
y: {
// display: false
title: {
display: true,
text: 'Current (Ampere)',
color: '#4859AF',
font: {
size: responsiveFontsize.value + 2,
weight: 'semibold',
},
},
grid: {
color: '#ecedf6',
borderColor: '#4859AF',
borderWidth: 0,
display: true,
},
ticks: {
color: '#4859AF',
font: {
size: responsiveFontsize.value,
family: 'Inter',
},
},
},
},
您可以使用可编写脚本的函数来获得最大值 属性:
const options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderColor: 'orange'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'pink'
}
]
},
options: {
scales: {
y: {
max: (scale) => (
scale.chart.data.datasets.reduce((acc, curr) => {
const max = Math.max(...curr.data);
acc = max > acc ? max : acc;
return acc;
}, Number.MIN_SAFE_INTEGER))
}
}
}
}
const ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.7.1/chart.js"></script>
</body>