Pareto Chart
In this demo, the DevExtreme Chart widget is used to create a Pareto chart. This example of a Pareto chart summarizes complaints about the service provided by a pizza shop. From this chart, the pizza shop owner may infer that to satisfy most of the customers, he or she needs to eliminate two most frequently encountered issues: delayed delivery and cold pizza.
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If you have technical questions, please create a support ticket in the DevExpress Support Center.
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<template>
<dx-chart
id="chart"
:data-source="dataSource"
palette="Harmony Light"
title="Pizza Shop Complaints"
>
<dx-argument-axis>
<dx-label overlapping-behavior="stagger"/>
</dx-argument-axis>
<dx-value-axis
:tick-interval="300"
name="frequency"
position="left"
/>
<dx-value-axis
:tick-interval="20"
:show-zero="true"
:value-margins-enabled="false"
name="percentage"
position="right"
>
<dx-label :customize-text="customizePercentageText"/>
<dx-constant-line
:value="80"
:width="2"
color="#fc3535"
dash-style="dash"
>
<dx-label :visible="false"/>
</dx-constant-line>
</dx-value-axis>
<dx-series
name="Complaint frequency"
value-field="count"
axis="frequency"
type="bar"
color="#fac29a"
/>
<dx-series
name="Cumulative percentage"
value-field="cumulativePercentage"
axis="percentage"
type="spline"
color="#6b71c3"
/>
<dx-tooltip
:enabled="true"
:shared="true"
:customize-tooltip="customizeTooltip"
/>
<dx-legend
vertical-alignment="top"
horizontal-alignment="center"
/>
<dx-common-series-settings argument-field="complaint"/>
</dx-chart>
</template>
<script>
import DxChart, {
DxArgumentAxis,
DxCommonSeriesSettings,
DxLabel,
DxLegend,
DxSeries,
DxTooltip,
DxValueAxis,
DxConstantLine
} from 'devextreme-vue/chart';
import { complaintsData } from './data.js';
export default {
components: {
DxChart,
DxArgumentAxis,
DxCommonSeriesSettings,
DxLabel,
DxLegend,
DxSeries,
DxTooltip,
DxValueAxis,
DxConstantLine
},
data: function() {
return {
customizeTooltip: function(info) {
return {
html: `<div><div class='tooltip-header'>${
info.argumentText
}</div><div class='tooltip-body'><div class='series-name'>${
info.points[0].seriesName
}: </div><div class='value-text'>${
info.points[0].valueText
}</div><div class='series-name'>${
info.points[1].seriesName
}: </div><div class='value-text'>${
info.points[1].valueText
}% </div></div></div>`
};
},
customizePercentageText: function(info) {
return `${info.valueText}%`;
}
};
},
computed: {
dataSource() {
let data = complaintsData.sort(function(a, b) {
return b.count - a.count;
}),
totalCount = data.reduce(function(prevValue, item) {
return prevValue + item.count;
}, 0),
cumulativeCount = 0;
return data.map(function(item) {
cumulativeCount += item.count;
return {
complaint: item.complaint,
count: item.count,
cumulativePercentage: Math.round(cumulativeCount * 100 / totalCount)
};
});
}
}
};
</script>
<style>
#chart {
height: 440px;
}
.tooltip-header {
margin-bottom: 5px;
font-size: 16px;
font-weight: 500;
padding-bottom: 5px;
border-bottom: 1px solid #c5c5c5;
}
.tooltip-body {
width: 170px;
}
.tooltip-body .series-name {
font-weight: normal;
opacity: 0.6;
display: inline-block;
line-height: 1.5;
padding-right: 10px;
width: 126px;
}
.tooltip-body .value-text {
display: inline-block;
line-height: 1.5;
width: 30px;
}
</style>
import Vue from 'vue';
import App from './App.vue';
new Vue({
el: '#app',
components: { App },
template: '<App/>'
});
<!DOCTYPE html>
<html>
<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" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.3/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.3/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import('./index.js');
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app">
<span v-if="false">Loading...</span>
</div>
</div>
</body>
</html>
export const complaintsData = [
{ complaint: 'Cold pizza', count: 780 },
{ complaint: 'Not enough cheese', count: 120 },
{ complaint: 'Underbaked or Overbaked', count: 52 },
{ complaint: 'Delayed delivery', count: 1123 },
{ complaint: 'Damaged pizza', count: 321 },
{ complaint: 'Incorrect billing', count: 89 },
{ complaint: 'Wrong size delivered', count: 222 }
];
System.config({
transpiler: 'plugin-babel',
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
vue: 'npm:vue@2.6.3/dist/vue.esm.browser.js',
'vue-loader': 'npm:dx-systemjs-vue-browser@latest/index.js',
'devextreme': 'npm:devextreme@19.2',
'devextreme-vue': 'npm:devextreme-vue@19.2',
jszip: 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.7/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram',
'devexpress-gantt': 'npm:devexpress-gantt',
'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js',
'systemjs-babel-build':
'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js'
},
meta: {
'*.vue': { loader: 'vue-loader' }
},
packages: {
'devextreme-vue': {
main: 'index.js'
},
'devextreme': {
defaultExtension: 'js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true
}
});