chart js 2 how to set bar width
JavascriptJquerychart.jsJavascript Problem Overview
I'm using Chart js version: 2.1.4 and I'm not able to limit the bar width. I found two options on stackoverflow
barPercentage: 0.5
or
categorySpacing: 0
but neither of one works with the mentioned version. Is there a way to solve this issue without manually modifying the chart.js core library?
thanks
Javascript Solutions
Solution 1 - Javascript
You were right : The attribute you have to edit is barPercentage
.
But maybe the error comes from where you edited the value.
As you can see in the bar chart options :
> Name : barPercentage
- Type : Number
- Default : 0.9
- Description : Percent (0-1) of the available width each bar should be within the category percentage. 1.0 will take the whole category width and put the bars right next to each other. Read More
The attribute is actually stored in scales.xAxes
("Options for xAxes" table).
So you just have to edit your chart this way :
var options = {
scales: {
xAxes: [{
barPercentage: 0.4
}]
}
}
Here is a fully working example with a custom width (
0.2
) for the bar :
var data = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [{
label: "My First dataset",
backgroundColor: "rgba(75,192,192,0.4)",
borderColor: "rgba(75,192,192,1)",
data: [65, 59, 75, 81, 56, 55, 40],
}]
};
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: data,
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}],
xAxes: [{
// Change here
barPercentage: 0.2
}]
}
}
});
console.log(myChart);
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.6/Chart.js"></script>
<canvas id="myChart"></canvas>
#Update (Chart.js Version 2.2.0+) As stated in the Release Version 2.2.0 - Candidate 2 :
>
Enhancements
> - Can now manually configure the thickness of a bar in a bar chart. Use a new barThickness
option on the correct axis to set the thickness of a bar.
-
And so on ...
Solution 2 - Javascript
For version 2.8+ (and apparently as far back as 2.2), there are now some excellent controls over the bar thickness, max thickness, etc.
Per the Chart.js documentation, you would set them like so:
{
type: 'bar', // or 'horizontalBar'
data: ...,
options: {
scales: {
xAxes: [{
barThickness: 6, // number (pixels) or 'flex'
maxBarThickness: 8 // number (pixels)
}]
}
}
}
Solution 3 - Javascript
As of v2.7.2 it can be done by:
scales: {
xAxes: [{
maxBarThickness: 100,
}],
}
Solution 4 - Javascript
In case if you are using ng2-chart in an angular project then the bar chart configuration looks Alike this:
npm install ng2-charts chart.js --save
import 'ng2-charts' in your module.
import { ChartsModule } from 'ng2-charts';
Now the bar chart configurations:
barChartOptions: ChartOptions = {
responsive: true,
maintainAspectRatio: false,
legend: {
display: false
},
};
barChartLabels: Label[] = ['2006', '2007', '2008', '2009', '2010', '2011', '2012'];
barChartType: ChartType = 'bar';
barChartLegend = true;
barChartPlugins = [];
barChartData: ChartDataSets[] = [
{
barThickness: 16,
barPercentage: 0.5,
data: [65, 59, 80],
label: 'Growth'
},
{
barThickness: 16,
barPercentage: 0.5,
data: [28, 48, 40],
label: 'Net'
}
];
barChartColors: Color[] = [
{ backgroundColor: '#24d2b5' },
{ backgroundColor: '#20aee3' },
];
Now the HTML part:
<div class="bar-chart-wrapper">
<canvas baseChart [datasets]="barChartData" [colors]="barChartColors"
[labels]="barChartLabels"
[options]="barChartOptions" [plugins]="barChartPlugins" [legend]="barChartLegend"
[chartType]="barChartType">
</canvas>
</div>
You can control the height of your chart container
.bar-chart-wrapper {
height: 310px;
}
Solution 5 - Javascript
barThickness
and maxBarThickness
(previously in ChartOptions[]
) are now a part of ChartDataSets[]
.
Solution 6 - Javascript
As per above answer
Here is complete Bar chart graph using react chartjs2.
import React from 'react';
import {
Chart as ChartJS,
CategoryScale,
LinearScale,
BarElement,
Title,
Tooltip,
Legend,
} from 'chart.js';
import { Bar } from 'react-chartjs-2';
ChartJS.register(
CategoryScale,
LinearScale,
BarElement,
Title,
Tooltip,
Legend
);
export const options = {
responsive: true,
plugins: {
legend: {
position: 'top', // lable position left/right/top/bottom
labels: {
boxWidth: 0, // lable box size
}
},
},
elements: {
point: {
radius: 1
}
},
scales: {
x: {
display: false, // show/ hide x-axis
grid: {
display: false // show/hide grid line in x-axis
},
},
y: {
display: false, // same as x-axis
grid: {
display: false
}
}
}
};
const labels = ['January', 'February', 'March', 'April', 'May', 'June', 'July'];
export const data = {
labels,
datasets: [
{
label: 'datasets', // label text
data: [100, 300, 500, 700],
backgroundColor: '#7b62ff', // bar / column color
barThickness: 6, // <<<<<<<<<<<< bar / column size
},
],
};
export default function ResumesGraph() {
return (
<div>
<Bar
data={data}
options={options}
width={'500px'}
height={'180px'}
/>
</div>
);
}