Polar Chart with Annotations
Annotations are images and text blocks that provide additional information about the visualized data.
To configure annotations, assign an array of objects to the annotations option. To specify settings for all annotations, use the commonAnnotationSettings object. Individual settings take precedence over common settings.
Each annotation's type attribute should be set to "text" or "image". In this demo, all annotations have the "text" type.
Annotations can be added at specific coordinates or anchored to a PolarChart element. This demo illustrates annotation placement:
- Angle and radius options specify the position of annotations with seasons names.
- Annotations with temperatures are anchored to series, and the offsetX, paddingTopBottom, and paddingLeftRight options specify their position.
For more information on annotation settings, refer to the annotations[] documentation section.
www.weather.com
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$(function () {
var maxDay = dataSource.reduce(function(prev, current) {
return prev.day >= current.day ? prev : current;
});
var minNight = dataSource.reduce(function(prev, current) {
return prev.night <= current.night ? prev : current;
});
$("#radarChart").dxPolarChart({
dataSource: dataSource,
commonSeriesSettings: {
type: "bar",
opacity: 0.75
},
series: [
{ valueField: "day", name: "Day", color: "#fdff5e" },
{ valueField: "night", name: "Night", color: "#0f3b59" }
],
commonAnnotationSettings: {
type: "text",
opacity: 0.7,
arrowLength: 0
},
annotations: [{
text: "WINTER",
angle: 45,
radius: 180
}, {
text: "SPRING",
angle: 135,
radius: 180
}, {
text: "SUMMER",
angle: 225,
radius: 180
}, {
text: "FALL",
angle: 315,
radius: 180
}, {
argument: maxDay.arg,
series: "Day",
text: "Highest temperature: " + maxDay.day + " °C",
opacity: 1,
offsetX: 105,
paddingTopBottom: 15,
paddingLeftRight: 15
}, {
argument: minNight.arg,
series: "Night",
text: "Lowest temperature: " + minNight.night + " °C",
opacity: 1,
offsetX: 105,
paddingTopBottom: 15,
paddingLeftRight: 15
}],
argumentAxis: {
strips: [{
startValue: "December",
endValue: "February",
color: "#0076d1"
}, {
startValue: "March",
endValue: "May",
color: "#3ca3b0"
}, {
startValue: "June",
endValue: "August",
color: "#3fbc1e"
}, {
startValue: "September",
endValue: "November",
color: "#f0bb00"
}]
},
legend: {
horizontalAlignment: "center",
verticalAlignment: "bottom"
},
title: "Average temperature in London"
});
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.6/css/dx.light.css" />
<script src="https://cdn3.devexpress.com/jslib/20.1.6/js/dx.all.js"></script>
<script src="data.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="index.js"></script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="radarChart"></div>
</div>
</body>
</html>
#radarChart {
height: 600px;
}
var dataSource = [{
arg: "December",
day: 7,
night: 3
}, {
arg: "January",
day: 6,
night: 2
}, {
arg: "February",
day: 7,
night: 3
}, {
arg: "March",
day: 10,
night: 3
}, {
arg: "April",
day: 14,
night: 5
}, {
arg: "May",
day: 18,
night: 8
}, {
arg: "June",
day: 21,
night: 11
}, {
arg: "July",
day: 22,
night: 13
}, {
arg: "August",
day: 21,
night: 13
}, {
arg: "September",
day: 19,
night: 11
}, {
arg: "October",
day: 15,
night: 8
}, {
arg: "November",
day: 10,
night: 4
}];