I'm new to chart.js, and I have a question about making x-axis labels position to the top.
This is the result that I expected: x-axis labels are on the top.
And this is my attempt:
const ctx = document.getElementById('weather_chart');
const myChart = new Chart(ctx, {
data: {
datasets: [{
type: 'bar',
label: 'rainfall probability',
data: [10, 20, 30, 40],
}, {
type: 'line',
label: 'temperature',
data: [50, 50, 50, 50],
borderColor: '#EB6E4B',
backgroundColor: '#EB6E4B',
}],
labels: ['now', '9am', '10am', '11am', '12pm'],
},
options: {
plugins: {
legend: {
display: false,
},
}
}
});
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<div id="chart">
<canvas id="weather_chart"></canvas>
</div>
If it is possible, would you take your time to write the answer?
Thanks in advance, and if my question is insufficient, I would appreciate it if you could tell me.
You can configure all scale related things like position in this namepsaces: options.scales[scaleId]. For more config options of the scales you can read the documentation: https://www.chartjs.org/docs/master/axes/
const ctx = document.getElementById('weather_chart');
const myChart = new Chart(ctx, {
data: {
datasets: [{
type: 'bar',
label: 'rainfall probability',
data: [10, 20, 30, 40],
}, {
type: 'line',
label: 'temperature',
data: [50, 50, 50, 50],
borderColor: '#EB6E4B',
backgroundColor: '#EB6E4B',
}],
labels: ['now', '9am', '10am', '11am', '12pm'],
},
options: {
scales: {
x: {
position: 'top'
}
},
plugins: {
legend: {
display: false,
},
}
}
});
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<div id="chart">
<canvas id="weather_chart"></canvas>
</div>
inside options > scales > xAxes the xAxes is an array, so we can define multiple axis and there configuration like this:
options:{
scales: {
xAxes: [
{
position: 'top',
ticks: {
maxRotation: 90,
minRotation: 80
}
}
]
}
}
Checkout the example here
https://codepen.io/ganeshbkdm/pen/oNeaOwm
Related
I am using v 3.8 of Chart.js library and the below is the code:
function createLineGraph(chartObject,chartId,data,labels,xLabel,yLabel) {
// Create a new Chart.js instance
var ctx = document.getElementById(chartId).getContext('2d');
chartObject = new Chart(ctx, {
type: 'line',
data: {
labels: labels,
datasets: data
},
options: {
responsive: true,
scales: {
x: {
ticks:{
display: true,
autoSkip: true,
maxTicksLimit: 10,
},
title: {
display: true,
text: xLabel
},
grid: {
display: false,
text: xLabel
}
},
y: {
beginAtZero: true,
min: 0,
max: 200,
ticks: {
tickSpacing: 50,
autoSkip:true,
},
title: {
display: true,
text: yLabel
},
grid: {
display: false,
}
}
}
}
});
chartObject.update();
}
HTML
<canvas id="chart"></canvas>
Right now it displays like the below:
And Ideally, I am looking something like this:
You can make the visual area of the graph bigger, increasing the size of the Chart with CSS if possible. if that is not possible, you could:
move the legend to the side,
plugins: {
legend: {
position: 'right',
}
},
Make the labels for the x-Axis shorter, since it is a datetime the best way would be setting the x-axis to type time (but you would have to add some libraies, checkout the documentation )
Here a demo, how I would do this:
const data = {
labels: ['2023-01-01 00:00:00','2023-01-01 01:00:00','2023-01-01 02:00:00','2023-01-01 03:00:00','2023-01-01 05:00:00'],
datasets: [{
label: 'Dataset 1',
borderColor: '#36A2EB',
backgroundColor: '#36A2EB',
data: [50, 150, 180, 160, 10],
},{
label: 'Dataset 2',
borderColor: '#FF6384',
backgroundColor: '#FF6384',
data: [20, 110, 80, 190, 20],
}
,{
label: 'Dataset 3',
borderColor: '#4BC0C0',
backgroundColor: '#4BC0C0',
data: [190, 190, 160, 150, 130],
}
,{
label: 'Dataset 4',
borderColor: '#FF9F40',
backgroundColor: '#FF9F40',
data: [100, 100, 150, 100, 100],
}],
};
const config = {
type: 'line',
data: data,
options: {
maintainAspectRatio: false,
plugins: {
legend: {
position: 'right',
},
},
scales: {
x: {
type: 'time',
}
}
}
};
const config1 = {
type: 'line',
data: data,
options: {
maintainAspectRatio: false,
}
};
new Chart(
document.getElementById('chart1'),
config1
);
new Chart(
document.getElementById('chart'),
config
);
new Chart(
document.getElementById('chart2'),
config1
);
<script src="//cdnjs.cloudflare.com/ajax/libs/Chart.js/3.9.1/chart.js"></script>
<script src="//cdn.jsdelivr.net/npm/moment#^2"></script>
<script src="//cdn.jsdelivr.net/npm/chartjs-adapter-moment#^1"></script>
<h2>Before</h2>
<div class="chart" style="height:184px; width:350px;">
<canvas id="chart1" ></canvas>
</div>
<h2>After<h2>
<div class="chart" style="height:184px; width:350px;">
<canvas id="chart" ></canvas>
</div>
<h2>Only changing the CSS height<h2>
<div class="chart" style="height:300px; width:350px;">
<canvas id="chart2" ></canvas>
</div>
I haven't worked with chart.js for some time but as far as I can see the height of the two charts is different, so because of that the line gap is so narrow there. Try experimenting with styling so that you can increase the height and I think that the gap will increase as well.
Y have this issue:
User 1 repeats twice in two colors, gray and white.
Gray should not be seen
This problem starts when I put styles to the x axis, it repeats the labels.
is there any solution for this case?
The requirement is simply to change the color of the axis labels and ticks.
The gray bar is at the bottom, that is, it does not stack with the red and blue ones
var data = {
labels: ["User1", "User2"],
datasets: [
{
stack:1,
label: "TotalTime",
backgroundColor: "red",
borderWidth: 1,
data: [50, 50],
yAxisID:1
},
{
stack:1,
label: "TotalTime",
backgroundColor: "blue",
borderWidth: 1,
data: [40, 40],
yAxisID:1
},
{
label: "Leave",
backgroundColor: "rgba(191,191,191, 0.5)",
borderWidth: 1,
data: [100, 100],
yAxisID:1
},
],
};
var options = {
indexAxis: "y",
scales: {
y: {
ticks: {
color: "white",
font: {
size: 12,
},
},
stacked: true,
},
x: {
ticks: {
color: "white",
font: {
size: 12,
},
},
}
}
}
var ctx = document.getElementById("myChart").getContext("2d");
var myBarChart = new Chart(ctx, {
type: 'bar',
data: data,
options: options
});
canvas{
background-color:black
}
<script src="https://cdn.jsdelivr.net/npm/chart.js#3.6.2/dist/chart.min.js"></script>
<canvas id="myChart" width="500" height="300"></canvas>
It is because of your yAxisID, you dont define it but chart.js still makes a new axis for it since it isnt made by you with that id, so if you remove that or make it y which you have defined it doesnt make it again anymore
var data = {
labels: ["User1", "User2"],
datasets: [{
label: "TotalTime",
backgroundColor: "red",
borderWidth: 1,
data: [50, 50],
},
{
label: "TotalTime",
backgroundColor: "blue",
borderWidth: 1,
data: [40, 40],
},
{
label: "Leave",
backgroundColor: "rgba(191,191,191, 0.5)",
borderWidth: 1,
data: [100, 100],
},
],
};
var options = {
indexAxis: "y",
scales: {
y: {
ticks: {
color: "white",
font: {
size: 12,
},
},
stacked: true,
},
x: {
stacked: true,
ticks: {
color: "white",
font: {
size: 12,
},
},
}
}
}
var ctx = document.getElementById("myChart").getContext("2d");
var myBarChart = new Chart(ctx, {
type: 'bar',
data: data,
options: options
});
canvas {
background-color: black
}
<script src="https://cdn.jsdelivr.net/npm/chart.js#3.6.2/dist/chart.min.js"></script>
<canvas id="myChart" width="500" height="300"></canvas>
This is using charts.js. This code only makes the line graph but the title, x axis and y axis does not show. I want to add title, and the names for those 2 axis onto the graph. what is wrong and how do you fix it? I also want to make the y axis to start from 0 and up.
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'
}
}]
}
}
});
}
the x and y should not be arrays but objects, also the scaleLabel prop is called title now. For all the changes please read the migration guide (https://www.chartjs.org/docs/master/getting-started/v3-migration.html)
Example:
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>
I have used horizontal bar chart from chart.js where i need percentage values to be shown next to each bar at right side? here is the bar sample image.
click here to view sample image of bar chart
Also these are the options i have tried :
xAxes: [
{
ticks: {
min: 0,
max: 100
},
grid: {
offset: false
}
},
],
yAxes: [
{
gridLines: {
display: false,
},
display: "right",
barPercentage: 0.8,
minBarLength: 2,
},
],
Is there any option which can turn the percentage values on at he right side of the horizontal bar chart?
Please click below image to see the expected output
click image expected output
You can make use of the datalabels plugin
Example:
<script src="https://cdn.jsdelivr.net/npm/chart.js#3.3.0/dist/chart.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels#2.0.0-rc"></script>
<canvas id="myChart" width="850" height="520"></canvas>
<script>
var ctx = document.getElementById('myChart');
Chart.register(ChartDataLabels);
Chart.defaults.set('plugins.datalabels', {
color: '#FE777B'
});
var myChart = new Chart(ctx, {
type: 'bar',
plugins: [ChartDataLabels],
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
data: [12, 19, 3, 5, 2, 3],
label: 'Advisor Closed MTD',
backgroundColor: 'rgb(192,111,94)',
barThickness: 25,
datalabels: {
color: '#FFCE56'
}
}],
},
options: {
indexAxis: 'y',
responsive: false,
plugins: {
datalabels: {
formatter: (val, context) => (`${val}%`),
anchor: 'end',
align: 'end',
labels: {
value: {
color: 'blue'
}
}
}
}
}
});
</script>
I am using Chart.js plugin.
I want to reduce the horizontal spacing.
Image 1 : I try
Image 2 : I want
JSFiddle Link Here!
HTML Code Here
<script src="https://cdn.jsdelivr.net/npm/chart.js#2.8.0"></script>
<canvas id="myChart" width="800" height="300"></canvas>
CSS Code Here
canvas {
margin:0 auto;
}
JS Code Here
var ctx = document.getElementById('myChart').getContext('2d');
var chart = new Chart(ctx, {
type: 'bar',
data: {
labels: ['April', 'May'],
datasets: [{
label: 'facebook',
borderColor: 'rgba(0,0,0,0)',
backgroundColor: '#3b5998',
data: [179, 201]
}, {
label: 'instagram',
borderColor: 'rgba(255,255,255,0)',
backgroundColor: '#e8361c',
data: [31, 47]
}]
},
options: {
responsive: false,
scales: {
yAxes: [{
display: false,
ticks: {
suggestedMin: 0
},
gridLines: {
display:false
}
}],
xAxes: [{
display:true,
barPercentage: 0.7,
categoryPercentage: 0.3,
gridLines: {
display:false
}
}]
},
legend: {
position:'bottom'
},
animation:false
}
});
I want to reduce the interval between categories. I do not know if there is a corresponding option. Please help me.