我正在尝试使用chart.js绘制图形，其中y轴值为数字，x轴值为字符串。我已经给出了编写的代码，但是没有绘制字符串值。感谢您的帮助。
window.onload = function() {
var dataPoints7 = [];
var chart7 = new CanvasJS.Chart("chartContainer7", {
animationEnabled: true,
theme: "light2",
title: {
text: "Cases in States"
},
axisY: {
title: "Cases",
titleFontSize: 24
},
data: [{
type: "line",
yValueFormatString: "#,### Cases",
dataPoints: dataPoints7
}]
});
fetch("https://api.covid19india.org/data.json", {
"method": "GET"
})
.then(function(response) {
return response.json();
})
.then(function(data) {
for (var i = 1; i < data.statewise.length; i++) {
dataPoints7.push({
x: data.statewise[i].state,
y: parseInt(data.statewise[i].confirmed)
});
}
chart7.render();
});
}<!DOCTYPE html>
<html lang="en">
<div id="chartContainer7" style="height: 370px; width: 100%;"></div>
<script src="https://canvasjs.com/assets/script/jquery-1.11.1.min.js"></script>
<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
</html>对于您的情况，您应该提供label 属性而不是x值，并且我相信您应该为此使用柱状图。
您可能会看到一些标签没有显示出来。您可以设置角度或增加图表的宽度以使其可见。
尝试运行此代码段
window.onload = function() {
var dataPoints7 = [];
var chart7 = new CanvasJS.Chart("chartContainer7", {
animationEnabled: true,
theme: "light2",
title: {
text: "Cases in States"
},
axisY: {
title: "Cases",
titleFontSize: 24
},
axisX: {
labelAngle: 180
},
data: [{
type: "line",
yValueFormatString: "#,### Cases",
dataPoints: dataPoints7
}]
});
fetch("https://api.covid19india.org/data.json", {
"method": "GET"
})
.then(function(response) {
return response.json();
})
.then(function(data) {
for (var i = 1; i < data.statewise.length; i++) {
dataPoints7.push({
label: data.statewise[i].state,
y: parseInt(data.statewise[i].confirmed)
});
}
chart7.render();
});
}<!DOCTYPE html>
<html lang="en">
<div id="chartContainer7" style="height: 370px; width: 100%;"></div>
<script src="https://canvasjs.com/assets/script/jquery-1.11.1.min.js"></script>
<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
</html>