My Radar chart will not display the data value when hovering over a point. Chart.js 2.8.0
<script src="./vendor/chart.js/Chart.js"></script>
<canvas id="radar-chart" width="1200" height="550"></canvas>
<script>
new Chart(document.getElementById("radar-chart"),{
type: 'radar',
data: {
labels: ["Buisiness Loans","Residential Loans","Aggriculture Loans","Student Loans","Personal Loans"],
datasets: [{
label: "Guthrie",
data: [13,22,21,29,15],
}],
}
});
</script>
This still happens when I use the template on this page.
So may not be directly due to something in chart.js. Problem occurs both in chrome and edge. I have no additional plugins loaded and no css.
EDIT 1 : hovering will display the labels just not the data value for the point.
This looks to be a regression in 2.8.0. The two example snippets below are identical except for the version of Chart.js they use. Tooltip values are present in 2.7.2 but not in 2.8.0.
This is apparently fixed and will be included in 2.9.0.
Note you can workaround the problem with a custom tooltip callback:
new Chart(document.getElementById("radar-chart"), {
type: 'radar',
data: {
labels: ["Buisiness Loans", "Residential Loans", "Aggriculture Loans", "Student Loans", "Personal Loans"],
datasets: [{
label: "Guthrie",
data: [13, 22, 21, 29, 15],
}],
},
options: {
tooltips: {
callbacks: {
label: function(tooltipItem, data) {
return data.datasets[tooltipItem.datasetIndex].label + ": " + tooltipItem.yLabel;
}
}
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.8.0/Chart.min.js"></script>
<canvas id="radar-chart" width="1200" height="550"></canvas>
2.8.0; broken tooltips:
new Chart(document.getElementById("radar-chart"), {
type: 'radar',
data: {
labels: ["Buisiness Loans", "Residential Loans", "Aggriculture Loans", "Student Loans", "Personal Loans"],
datasets: [{
label: "Guthrie",
data: [13, 22, 21, 29, 15],
}],
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.8.0/Chart.min.js"></script>
<canvas id="radar-chart" width="1200" height="550"></canvas>
2.7.2; working tooltips:
new Chart(document.getElementById("radar-chart"), {
type: 'radar',
data: {
labels: ["Buisiness Loans", "Residential Loans", "Aggriculture Loans", "Student Loans", "Personal Loans"],
datasets: [{
label: "Guthrie",
data: [13, 22, 21, 29, 15],
}],
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.min.js"></script>
<canvas id="radar-chart" width="1200" height="550"></canvas>
Related
I have chartjs v2.9.3 in my Django app and it works great. Now I need to add a box to one of my charts using chartjs-plugin-annotation, and I've followed all the steps, but I can't get it to work.
I've used chartjs-plugin-annotation v0.5.7 which is for v2.9.3. I get no errors in the console log.
First, scripts with chart.js and plugins:
<script src="https://cdn.jsdelivr.net/npm/chart.js#2.9.3/dist/Chart.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels#0.7.0"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-annotation#0.5.7/chartjs-plugin-annotation.min.js"></script>
My code for chart (chart works, I just can't get box to appear):
<canvas id="myChart" height="250"></canvas>
<script>
function setChart12(){
$('#myChart').remove();
$('#container_glavni').append('<canvas id="myChart" height="200"></canvas>');
var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: date,
datasets: [{
label: 'Number of reports',
data: data_nc
}, {
type: 'line',
label: 'Median',
data: [50],
fill: false,
borderColor: 'rgb(54, 162, 235)',
}],
},
options: {
layout: {
padding: {
top: 30
}
},
responsive: true,
legend: {
display: false
},
plugins: {
datalabels: {
anchor: 'end',
align: 'end',
offset: 5,
},
autocolors: false,
annotation: {
annotations: {
box1: {
type: 'box',
xMin: 0,
xMax: 1,
yMin: 0,
yMax: 30,
backgroundColor: 'rgba(255, 99, 132, 0.25)'}
}
}
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
}
});}
</script>
I've tried:
Different values for min and max
Different colors
Different code formating
This is because you putted the options in the place where they belong in V1 of the annotation plugin and the syntax too. For V0.5.7 the annotation options have to be placed in the root of the options and also all the annotations are an array instead of seperate objects:
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: {
annotation: {
annotations: [{
id: "hline",
type: "line",
mode: "horizontal",
scaleID: "y-axis-0",
value: 10,
borderColor: "red",
}]
},
}
}
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/2.9.4/Chart.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-annotation#0.5.7/chartjs-plugin-annotation.min.js"></script>
</body>
I am trying to reduce padding and increase title text font size , I went though few example but dont seem to work. Even on placing the parameter at multiple places.
const labels1_1 = ['1','2','3', '4', '5','6','7', '8','9+'];
const data1_1 = {
labels: labels1_1,
datasets: [{
label: 'Trucks',
data: [1,2,3, 4, 5,6,7, 8,9],
backgroundColor: '#4472C4',
borderColor: '#4472C4',
borderWidth: 1
}]
};
const config1_1 = {
type: 'bar',
data: data1_1,
options: {
title:{
padding:5,
fontSize:18
},
plugins: {
title: {
display: true,
text: 'Number of SS vs Number of Trucks',
padding:5,
fontSize:18
},
datalabels: {
align: 'end',
anchor: 'end',
backgroundColor: '#3472C4'
},
},
scales: {
y: {
display:true,
beginAtZero: true,
title: {
display: true,
text: 'SS'
}
},
}
},
};
const myChart1_1 = new Chart(
document.getElementById('myChart1_1'), config1_1);
I went through https://www.chartjs.org/docs/2.8.0/configuration/title.html but didnt help. Also how to mention it globally so all titles have bigger font. text: 'Number of SS vs Number of Trucks' is the title.
The Title options have evolved quite a bit in v2 of Chartjs. I found that the title was hidden entirely until I added padding - for one example
options: {
plugins: {
title: {
display: true,
text: "Title" ,
padding: {
top: 10,
bottom: 10
},
font: {
size: 24,
style: 'italic',
family: 'Helvetica Neue'
}
}
},
... other options here
}
The reason it didn't help is because you are looking at the docs for version 2.8.0 as you can see in the url, the latest version is 3.6.2 and has some breaking changes against v2.
To adjust the font propertys you will need to define them in the font object in the title config 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: 'pink'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'orange'
}
]
},
options: {
plugins: {
title: {
display: true,
text: 'Number of SS vs Number of Trucks',
font: {
size: 30
}
}
}
}
}
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/3.6.2/chart.js"></script>
</body>
latest V3 documentation: https://www.chartjs.org/docs/latest/
Hello i am rendering these charts using chart js but i am unable to align these charts in the same order my config file and options file is given below
can anyone please help me with this. i tried with below options and data
const options = {
indexAxis: "y",
maintainAspectRatio: false,
aspectRatio: 0.8,
barThickness: 20,
responsive: true,
layout: {
padding: {
left: 1
}
},
plugins: {
legend: {
display: false
}
},
scales: {
x: {
ticks: {
color: "#495057"
},
grid: {
color: "#ebedef"
}
},
y: {
ticks: {
color: "#495057",
crossAlign: "near"
},
grid: {
color: "#ebedef"
},
gridLines: {
offsetGridLines: true,
display: true
}
}
}
};
const data = {
labels: ["red"],
datasets: [{
backgroundColor: "#42A5F5",
data: [65],
borderWidth: 2,
borderRadius: 75,
borderSkipped: false
},
{
backgroundColor: "#FFA726",
data: [28],
borderWidth: 2,
borderRadius: 50,
borderSkipped: false
}
]
};
how to align one below the other labels
As far as I know chart.js does not provide an option to set a minimum distance for the labels, a workaround to achieve this is to add spaces the the labels of the charts where the labels are shorter as the longest one so you will get something like this:
var options = {
type: 'bar',
data: {
labels: [" Red"],
datasets: [{
label: '# of Votes',
data: [12],
backgroundColor: 'pink'
}]
},
options: {
indexAxis: 'y'
}
}
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/3.5.0/chart.js"></script>
</body>
var options = {
type: 'bar',
data: {
labels: [" Red"],
datasets: [{
label: '# of Votes',
data: [12],
backgroundColor: 'pink'
}]
},
options: {
indexAxis: 'y'
}
}
var options2 = {
type: 'bar',
data: {
labels: [" Yellowwwww"],
datasets: [{
label: '# of Votes',
data: [12],
backgroundColor: 'pink'
}]
},
options: {
indexAxis: 'y'
}
}
var ctx = document.getElementById('chartJSContainer').getContext('2d');
var ctx2 = document.getElementById('chartJSContainer2').getContext('2d');
new Chart(ctx2, options2);
new Chart(ctx, options);
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<canvas id="chartJSContainer2" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.5.0/chart.js"></script>
</body>
I've assigned three different colours to the labels, but the colour dots always show up as Blue, Green and Yellow. I'm pretty sure I've done something wrong.
The code I've written is:
var pieSimpleChart = {
chart: {
height: 350,
type: 'pie',
},
legend: {
position: 'bottom'
},
labels: ["IT", "Product Development", "Sales"],
series: [2, 2, 6],
fill: {
colors: ["#447b40", "#cc7870", "#e74ce4"]
}
}
var chart = new ApexCharts(document.querySelector("#task-pie-chart"), pieSimpleChart);
chart.render();
How can I match the labels to my selected colours?
I fixed it by removing "fill" option.
Now code looks like:
var pieSimpleChart =
{
chart:
{
height: 350,
type: 'pie',
},
legend:
{
position: 'bottom'
},
labels: ["IT", "Product Development", "Sales"],
series: [2, 2, 6],
colors: ["#447b40", "#cc7870", "#e74ce4"]
}
Use backgroundColor instead off fill: colors.
Also, you should use the dataset object for passing the values:
var ctx = document.getElementById("myChart").getContext('2d');
var myChart = new Chart(ctx, {
type: 'pie',
data: {
labels: ["IT", "Product Development", "Sales"],
datasets: [{
backgroundColor: [
"#ff0000",
"#00ff00",
"#0000ff"
],
data: [2, 2, 6]
}]
},
options: {
legend: {
position: 'bottom'
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.8.0/Chart.js"></script>
<div class="container">
<div>
<canvas id="myChart"></canvas>
</div>
</div>
I am able to create a chart.js pie chart below:
this.httpClient.get(this.url).subscribe((res: Stock[]) => {
res.forEach(holding => {
this.company.push(holding.company);
this.price.push(holding.price);
});
this.chart = new Chart('canvas', {
type: 'pie',
data: {
labels: this.company,
datasets: [
{
data: this.price,
borderColor: '#3cba9f',
backgroundColor: 'rgba(35, 206, 107, 0.5)',
fill: false
}
]
},
options: {
legend: {
display: true
}
}
});
});
At the moment, each segment of the pie chart has the same backgroundColor, as I have assigned it above.
My issue is that I want each segment of the pie to have a different background color. Can someone please tell me how I can make this change with the above code?
You can pass an array of strings (colours) to backgroundColor:
backgroundColor: ['red', 'green', 'blue']
Example:
new Chart(document.getElementById("chart"), {
type: "pie",
data: {
datasets: [{
data: [1, 2, 3],
backgroundColor: ['red', 'green', 'blue']
}]
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.8.0/Chart.min.js"></script>
<canvas id="chart"></canvas>