[英]Charts.js line chart, how to hide y-axis start and end label if data is same
[英]How do you set x and y axis and Title for a line chart using charts.js?
這是使用 charts.js。 此代碼僅制作折線圖,但不顯示標題、x 軸和 y 軸。 我想在圖表上添加標題和這兩個軸的名稱。 出了什么問題,您如何解決? 我還想讓 y 軸從 0 開始向上。
async function chartDisplay() {
await getData1();
await getData2();
const ctx = document.getElementById('chart').getContext('2d');
const myChart = new Chart(ctx, {
type: 'line',
data: {
labels: xLabels,
datasets: [{
data: ratingDataI,
label: "data1",
borderColor: "#3E95CD",
fill: false
},
{
data: ratingDataA,
label: "data2",
borderColor: "#3E95CD",
fill: false
}
]
},
options: {
responsive: true,
title: {
display: true,
text: 'Chart.js Line Chart'
},
tooltips: {
mode: 'label',
},
hover: {
mode: 'nearest',
intersect: true
},
scales: {
x: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Dates'
}
}],
y: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Value'
}
}]
}
}
});
}
x 和 y 不應該是數組而是對象,並且scaleLabel
道具現在稱為title
。 對於所有更改,請閱讀遷移指南 ( https://www.chartjs.org/docs/master/getting-started/v3-migration.html )
例子:
var options = { type: 'line', data: { labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"], datasets: [{ label: '# of Votes', data: [12, 19, 3, 5, 2, 3], borderColor: 'pink' }] }, options: { scales: { y: { beginAtZero: true, title: { display: true, text: 'yAxis' } }, x: { title: { display: true, text: 'xAxis' } } } } } var 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/3.4.1/chart.js"></script> </body>
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