I have the below chart using chart.js 3.x.
https://jsfiddle.net/7oxmesnj/1/
I have below chart configuration:
var options = {
type: 'scatter',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [
{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderWidth: 0,
showLine: true,
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderWidth: 0,
showLine: true,
}
]
},
options: {
scales: {
y:{
type: 'linear',
min: 0,
max: 500,
ticks: {
stepSize: 100,
reverse: false
}
},
x:{
type: 'linear',
min: 0,
max: 500,
ticks: {
stepSize: 100,
reverse: false
}
}
}
}
}
I am not able to plot the data on the scatter chart.
I have followed the migration guild, but still no data on chart.
https://www.chartjs.org/docs/master/getting-started/v3-migration
You should change datasets to have pairs of numbers (x, y). See documentation.
var options = {
type: 'scatter',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [{x:12,y:7}, {x:19,y:11}, {x:3,y:5}, {x:5,y:8}, {x:2,y:3}, {x:3,y:7}],
borderWidth: 1,
showLine: true,
pointBackgroundColor: 'red',
borderColor: 'blue',
backgroundColor: 'blue',
}]
},
}
var ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
canvas {
background-color: #eee;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.0.0-beta/chart.min.js"></script>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
The main problem in your code is the definition of the x-axis. The x-axis represents the labels, which are strings. Therefore, you cannot define numeric min, max and ticks.stepSize options.
In order to obtain a scatter chart with given data, you could change its type to 'line' and define showLine: false on each dataset.
Please take a look at your amended code below. I changed y
var options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
fill: false,
showLine: false
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
fill: false,
showLine: false
}
]
},
options: {
scales: {
y: {
min: 0,
max: 50,
ticks: {
stepSize: 10
}
}
}
}
};
new Chart('chartJSContainer', options);
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.0.0-beta/chart.min.js"></script>
<canvas id="chartJSContainer"></canvas>
Related
I am trying to set min/max starting values to scale and circular grid to a radar in chartjs, but none seens to work.
const chart1 = new Chart($('#chart-area1'), {
type: 'radar',
data: {
labels: ['test1', 'test2', 'test3'],
datasets: [{
label: '1',
data: [20, 25, 55],
borderColor: setup_borderColor[0],
backgroundColor: setup_backgroundColor[0],
borderWidth: 1
},{
label: '2',
data: [25, 35, 40],
borderColor: setup_borderColor[1],
backgroundColor: setup_backgroundColor[1],
borderWidth: 1
}]
},
options: {
scale: {
min: 0,
max: 100,
},
scales: {
r: {
grid: {
circular: true
}
}
}
}
});
The radar chartjs should start at 0 with a max value at 100 and be a circular grid, but both options dont work, my result:
Result:
Chartjs version: Chart.js v2.9.3
You are mixing V2 and V3 syntax in all the wrong ways, in V2 you need to use the scale option not scales.r and the min/max have to be configured in the ticks part not in the root and grid must be gridLines:
var options = {
type: 'radar',
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: {
scale: {
ticks: {
max: 40,
min: 0
},
gridLines: {
circular: true
}
}
}
}
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>
</body>
For more info you can read the 2.9.4 documentation
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 am using Chart.js library in my project and I have one issue that I could't solve.
This label that describes what the data shown is about, is one info that I don't actually need in my project. How can I remove it completely?
In another chart I need to place it in the right side of the chart, but I can't manage it. How can I solve these two problems that I have?
At the moment my code looks like this:
type: 'bar',
data: {
labels: data.map(x => moment(x.date).format("MMM Do")),
datasets: [{
data: data.map(x => x.premium),
backgroundColor: '#ffec87',
borderColor: "#ffec87",
borderWidth: 2,
borderStyle: 'dotted'
}]
},
Any ideas?
Thanks in advance!
Since its part of the legend you will need to configure it in the options.
Don't show at all example:
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: {
legend: {
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/3.6.0/chart.js"></script>
</body>
Show it on the right side example:
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: {
legend: {
position: 'right'
}
}
}
}
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/3.6.0/chart.js"></script>
</body>
Dont show undefined labels:
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'
},
{
data: [7, 11, 5, 8, 3, 7],
borderColor: 'orange'
}
]
},
options: {
plugins: {
legend: {
labels: {
filter: (legendItem, data) => (typeof legendItem.text !== 'undefined')
}
}
}
}
}
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/3.6.0/chart.js"></script>
</body>
For more information you can read the documentation about it
I agree with LeeLenalee answer but I think you need this for aligning:
plugins: {
legend: {
align: 'end',
}
},
Basically, I want to change grid color of my chart.js chart.
Here is my code:
const options = {
scales: {
x: {
grid: {
color: 'rgba(255,0,0,0.1)',
borderColor: 'red'
}
},
y: {
grid: {
color: 'rgba(0,255,0,0.1)',
borderColor: 'green'
}
}
}
};
var chart0 = new Chart(document.getElementById("chart0"), {
type: 'bar',
data: {
labels: [some,lables,here],
datasets: [
{
data: dataarr0,
fill: true,
backgroundColor: 'rgb(255, 99, 132)'
}
],
options: options
}
});
Chart just didn't seem to care and stays the same color. What I am doing wrong?
The options have to be defined on the same level as the type and data are defined. Then it works fine:
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: {
color: 'red',
borderColor: 'green'
}
},
y: {
grid: {
color: 'red',
borderColor: 'green'
}
}
}
}
}
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/3.5.1/chart.js"></script>
</body>
I have a chartjs line chart that has multiple lines like that;
I have been trying to add a date-time selector but I am not able to update my chart because I don't get how to reach the datas of my chart. Here is my chart decleration;
var ctx = document.getElementById('canvas');
var myChart = new Chart(ctx, {
type: 'line',
data: {
labels: time1, time2,
datasets: [
{
label: 'Temperature - 1',
data: temp1,
backgroundColor: 'transparent',
borderColor: 'red',
borderWidth: 3
},
{
label: 'Temperature - 2',
data: temp2,
backgroundColor: 'transparent',
borderColor: 'purple',
borderWidth: 3
},
{
label: 'Humidity - 1',
data: hum1,
backgroundColor: 'transparent',
borderColor: 'green',
borderWidth: 3
},
{
label: 'Humidity - 2',
data: hum2,
backgroundColor: 'transparent',
borderColor: 'yellow',
borderWidth: 3
}]
},
options: {
elements: {
line: {
tension: 0
}
},
scales: {
y: {
title: "Temperature/Humidity",
beginAtZero: true,
min: 10,
max: 60
}
}
}
});
time1, time2, temp1, temp2, hum1, hum2 are all array. When I want to update the chart using chart.update() function that I read at its own documentation, as I said I don't get it how to reach to data arrays like temp1, temp2.
Something like myChart.data.datasets.data would not work, making them like json;
{first_data:{
label: 'Temperature - 1',
data: temp1,
backgroundColor: 'transparent',
borderColor: 'red',
borderWidth: 3
}},
Doesn't work also, how can I reach to temp1 for example?
SOLUTION:
Because of my carelessness I had asked a nonsense question. Because of myChart.data.datasets is an object, I am able to reach to temp1 like myChart.data.datasets[0].data, sorry everyone
You will need to target the specific dataset you want to get the data from so to get the data of the Temperature - 1 dataset you will need to target it like this: myChart.data.datasets[0].data
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: 'orange'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'pink'
}
]
},
options: {}
}
var ctx = document.getElementById('chartJSContainer').getContext('2d');
const myChart = new Chart(ctx, options);
console.log(myChart.data.datasets[0].label)
console.log(myChart.data.datasets[0].data)
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.5.1/chart.js"></script>
</body>