I was trying to add a multiple-lined title for the Y-axis in my chart created by chartJs. I could find that the whole title for the chart can use an array of strings to do so but did not find any option to do the same for any of the axes.
I have used the following option to sow the title currently:
scales: {
yAxes: [
{
ticks: {
beginAtZero: true,
},
scaleLabel: {
display: true,
labelString: "Deviation from average \n Total" //Multi line label
},
}
],
StackBlitz repro of the same.
Current output:
Expected Output:
You will have to update to version 3 of the lib to use this feature, here you can specify the text of the scale title also as an array to make it multi lined.
The angular wrapper stable build only supports v2 atm, they have a beta build available for v3 so you will need to install the wrapper with the next tag behind it to install the beta version or specify the version you want in your package.json
Plain example:
var options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderWidth: 1
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderWidth: 1
}
]
},
options: {
scales: {
y: {
title: {
display: true,
text: ['first line', 'second line'] // array so it becomes multi lined
},
ticks: {
reverse: false
}
}
}
}
}
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/3.2.0/chart.js" integrity="sha512-opXrgVcTHsEVdBUZqTPlW9S8+99hNbaHmXtAdXXc61OUU6gOII5ku/PzZFqexHXc3hnK8IrJKHo+T7O4GRIJcw==" crossorigin="anonymous"></script>
</body>
Related
I used to use below configuration in Chart.js#2.9.4 in SvelteKit and it was showing all values of the dataset in a specific point of line chart. [REPL LINK]
options: {
tooltips: {
mode: 'index',
intersect: false
},
hover: {
mode: 'nearest',
intersect: true
},
responsive: true
}
The output was:
After upgrading chart to chart.js#3.8.0 it isn't showing all datasets at one point as above configuration.
This is the output in chart.js#3:
I am expecting it to show all datasets at one point.
Thank you in advance!
This is because you are updating to a new major version which has multiple major breaking changes, so is the tooltip config moved from the options.tooltips namespace to the options.plugins.tooltip namespace, if you change this it works as expected. I suggest you read the migration guide first since there are more things changed that will break if you only update the version number.
const options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderColor: 'pink'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'orange'
}
]
},
options: {
plugins: {
tooltip: {
mode: 'index',
intersect: false
}
}
}
}
const 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/3.8.0/chart.js"></script>
</body>
I have a little experience with chartjs but I am unable to find a way to hide the default line. I'm adding this image here which I need to fix.
I need to hide the line like this one
https://i.stack.imgur.com/UXMpi.png.
I need to make it like this one
https://i.stack.imgur.com/Phsos.png
If anyone knows how to do this, please let me know. Thanks.
set display to false in the grid settings of the x axis and drawBorder to false in both axes like so:
const options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderColor: 'orange'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'pink'
}
]
},
options: {
scales: {
x: {
grid: {
display: false,
drawBorder: false
}
},
y: {
grid: {
drawBorder: false
}
}
}
}
}
const 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/3.8.0/chart.js"></script>
</body>
I'm trying to make a radar chart with a dark background. White index labels distract from the chart itself.
(my chart)
I found a thread that raised a question about customizing index labels, but the code in the answer only works with version 2.1.3 or mb close to it.
Is it possible in chart.js#3.5.1?
You need to set display to false in the ticks like so:
const options = {
type: 'radar',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderColor: 'pink'
}]
},
options: {
scales: {
r: {
angleLines: {
display: false
},
grid: {
display: false
},
ticks: {
display: false
}
}
}
}
}
const 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/3.7.1/chart.js"></script>
</body>
I am using Chart.js to draw a simple line chart.
How can I make small grid lines on top of the xAxis labels?
The documentation for Line Chart is here: https://www.chartjs.org/docs/2.7.3/getting-started/?h=line, but I can't find anything about it.
I removed the XAxis and YAxis grid lines.
This is an example of the small grid lines wanted:
Thanks in advance.
Instead of removing the gridlines you can set the drawOnChartArea to false:
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'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'orange'
}
]
},
options: {
scales: {
x: {
grid: {
drawOnChartArea: false
}
},
y: {
grid: {
drawOnChartArea: false
}
}
}
},
}
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/3.6.2/chart.js"></script>
</body>
I have a chart where I already know the set amount of ticks I'll need. There's 3 with a grouped bar type chart. I'm scratching my head over how to force it. Right now it's showing 0 to whatever number ends up in my data set and auto scales as required.
By default it's assumed I'm using numbers to scale but in this scenario it's a Positive, neutral, negative (those labels literally) on Y-Axis that are the data points related to a specific date on X axis (with 2 grouped bars labeled AM/PM).
The Chart.js documentation doesn't seem to explain how to tweak when working outside of numbers on the ticks configurations and I'm not sure how to shoehorn this in. Any ideas? Below is the code for as far as I've gotten.
The screenshot example I basically simulated the 3 data points by choosing 4,8 and 12. I would like those labels to be (negative,positive,neutral) and make all other ticks disappear.
<canvas id="myChart" width="400" height="400"></canvas>
<script>
var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ['Date/MoonCenter', 'Date/MoonCenter', 'Date/MoonCenter'],
datasets: [{
label: 'Dataset 1', backgroundColor: window.chartColors.red,
stack: 'Stack 0',
data: [4, 12, 4, 8, 12, 4]
},{
label: 'Dataset 1', backgroundColor: window.chartColors.blue,
stack: 'Stack 1',
data: [8, 8, 12, 4, 4, 12]
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
}
});
</script>
you just need add the callback in the ticks,
<canvas id="myChart" width="400" height="400"></canvas>
<script src='Chart.js'></script>
<script>
var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ['Date/MoonCenter', 'Date/MoonCenter', 'Date/MoonCenter'],
datasets: [{
label: 'Dataset 1', backgroundColor: window.chartColors.red,
stack: 'Stack 0',
data: [4, 12, 4, 8, 12, 4]
}, {
label: 'Dataset 1', backgroundColor: window.chartColors.blue,
stack: 'Stack 1',
data: [8, 8, 12, 4, 4, 12]
}]
},
options: {
scales: {
yAxes: [
{
ticks: {
beginAtZero: true,
callback: function (label, index, labels) {
switch (label) {
case 4:
return 'negative';
case 8:
return 'positive';
case 12:
return 'neutral';
}
}
}
}
]
}
}
});
</script>
Additional to saul's answer:
Just add max-settings to the y-axis.
ticks: {
max: 12
}
You also have to do callbacks for the tooltip if you want to display "positive", "negative" and "neutral" instead of 4, 8 and 12.