I wanna know if it's possible to change the color of the chart axis using ChartJS.
Thanks
I know this question was asked over 2 years ago and the OP has already marked a correct answer, but I have a solution to the problem that the OP mentioned in the comments of the marked answer and I'd like to solve it to save other people some time.
But this changes the color of the axis and all the gridLines, what if
I just want to change the axis color? For example, I want the axis
line solid black and the grid lines grey.
If you're trying to achieve this, then the marked answer won't do it for you but the following should:
yAxes: [{
gridLines: {
zeroLineColor: '#ffcc33'
}
}]
you can change the color by scales configuration under chart options:
type: '...',
data: {...},
options: {
scales: {
xAxes: [{gridLines: { color: "#131c2b" }}],
yAxes: [{gridLines: { color: "#131c2b" }}]
}
}
Good question and good answer from #A Friend
His answer works perfectly well with ....... chart.js v2.xx
Here now for version 3.xx for those interested:
(as v3.xx is not backwards compatible with v2.xx)
Using borderColor instead of zeroLineColor to change the color of the chart axis using Chart.js v3.xx:
scales: {
x: { // <-- axis is not array anymore, unlike before in v2.x: '[{'
grid: {
color: 'rgba(255,0,0,0.1)',
borderColor: 'red' // <-- this line is answer to initial question
}
},
y: { // <-- axis is not array anymore, unlike before in v2.x: '[{'
grid: {
color: 'rgba(0,255,0,0.1)',
borderColor: 'green' // <-- this line is answer to initial question
}
}
}
Following a working snippet with complete code:
const labels=["2021-08-01","2021-08-02","2021-08-03","2021-08-04","2021-08-05"];
const data_1=[39,41,42,43,43];
const data_2=[37,38,40,41,39];
const ctx=document.querySelector('canvas').getContext('2d');
const data = {
labels: labels,
datasets: [{
label: 'Data 1',
borderColor: 'grey',
data: data_1
}, {
label: 'Data 2',
borderColor: 'grey',
data: data_2
}]
};
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'
}
}
}
};
const chart = new Chart(ctx, {
type: 'line',
data: data,
options: options
});
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<!-- gets you the latest version of Chart.js, now at v3.5.0 -->
<canvas width="320" height="240"></canvas>
In the Charjs.JS to style the scale label and ticks we can use below settings.
options: {
scales: {
xAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'X axe name',
fontColor:'#000000',
fontSize:10
},
ticks: {
fontColor: "black",
fontSize: 14
}
}],
yAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Y axe name',
fontColor: '#000000',
fontSize:10
},
ticks: {
fontColor: "black",
fontSize: 14
}
}]
}
}
Please refer the link for all the properties. Study all the property before implementation.
Happy coding !
For ChartJs 3 updated in 2022
You can pass the options object when initializing the context. In the sample code I was use x to change the line color on X Axis, you can try y as well.
options: {
scales: {
x: {
grid: {
color: '#777777'
}
}
},
Related
I am trying to create a series of line chart dynamically and then update them once the data has been updated for a particular user in real-time.
I am running into difficulty because I can only get the most recent one to render.
I think this is because when the following code runs it overwrites the ctx variable and I lose the earlier charts.
I tried the following technique with dynamic variables so no two ctx variables would be the same, but it doesn't work.
Thanks in advance for your help.
window['ctx_'+userid] = document.getElementById("forceCurveGraph_"+userid).getContext("2d");
window['myLineChart'+userid] = new Chart(window['ctx_'+userid], {
type: 'line', data: {
datasets: [{
label: "Force Curve",
data: forcecurvedata, backgroundColor: ['rgba(57,118,251, 0.8)']
}],
labels: labels
}, options: {
backgroundColor: ['rgba(40, 84, 141, 0.3)'],
scales: {
yAxes: [{
ticks: {
beginAtZero: true,
max: graphMax
}
}],
xAxes: [{
ticks: {
display: false
}
}]
}
}
})
How can I add these styles to my graph? I'm having trouble finding it in the documentation for it, and the other forums aren't very helpful. I am using Flask for the backend, so that's why the data values look like that.
Labels on top of bars
Change font size on both axis
Set y scale as a fixed value (0,8)
<script>
var ctx = document.getElementById('myChart').getContext('2d');
var options = {
scales: {
yAxes: [{
ticks: {
fontSize: 40
}
}]
}
}
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ['Lithium Battery', 'Other Mfg', 'Delivery', 'Tailpipe', 'Fuel Cycle', 'Disposal', 'Total'],
datasets: [{
label: 'ICEV CAR (MTCO2e/Year)',
labels: [
"{{data['battery_icev_car']}}",
"{{data['other_mfg_icev_car']}}",
"{{data['delivery_icev_car']}}",
"{{data['tailpipe_icev_car']}}",
"{{data['fuel_cycle_icev_car']}}",
"{{data['disposal_icev_car']}}",
"{{data['total_icev_car']}}"
],
data: [ /* errors are normal, fixes when server ru
[0, {{data['y1_icev']}}],
[{{data['y1_icev']}}, {{data['y2_icev']}}],
[{{data['y2_icev']}}, {{data['y3_icev']}}],
[{{data['y3_icev']}}, {{data['y4_icev']}}],
[{{data['y4_icev']}}, {{data['y5_icev']}}],
[{{data['y5_icev']}}, {{data['y6_icev']}}],
[0, {{data['y6_icev']}}]
],
backgroundColor: [
'rgba(0,0,0,0.9)'
],
borderColor: [
'rgba(0,0,0,1)'
],
borderWidth: 1,
borderSkipped: false
}]
},
options: {
responsive: true,
plugins: {
legend: {
labels: {
// This doesn't work on axis
font: {
size: 20
}
}
}
},
y: {
beginAtZero: true
}
}
});
</script> </script>
Since your config is not working I assume you are using V3, in which case the solution is as followed:
For point one you need to use an external plugin, you can write your own or use the datalabels plugin
For your second problem you need to style it as a font object as told in the documentation like so:
options: {
scales: {
y:{
ticks:{
font:{
size: 50
}
}
}
}
}
For your last part you can set the stepSize to 0.8
I have chart which show 3 types of label
I want to keep two of them and want to hide one Invoice Income Report. How can I hide that one label? I am using chart.js v2
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: labels,
datasets: [{
label: 'Invoice Income Report',
data: bar_chart_data,
backgroundColor: colors,
borderWidth: 1
}, {
label: 'Below Average',
backgroundColor: ['rgba(255, 99, 132, 1)']
}, {
label: 'Above Average',
backgroundColor: ['rgba(11, 156, 49, 1)']
}]
},
options: {
scales: {
y: {
beginAtZero: true
}
},
}
});
You can simply make display false.
const options = {
responsive: true,
plugins: {
legend: {
position: 'top' as const,
display: false,
},
title: {
display: false,
text: 'Chart.js Line Chart',
},
},
};
To hide the labels on version 4.2.1 of chart.js use this:
// Example chart.
const chart = new Chart(id, {
type: 'bar', // Chart type.
data: data, // Your data.
options: {
// Add plugins to options.
plugins: {
legend: {
display: false // This hides all text in the legend and also the labels.
}
}
// add your scales or other options.
}
});
For more info use the doc: https://www.chartjs.org/docs/latest/configuration/legend.html
In chart.js, You can hide the labels using legend attribute. Add the following code in options of chart.js
legend: {
display: false
}
According to your code, after adding legend the options will be .....
options: {
scales: {
y: {
beginAtZero: true
}
},
legend: {
display: false
}
}
Add legend option to options configuration, set display to false:
, options: {
scales: {
y: {
beginAtZero: true
}
},
legend: {
display: false
}
}
docs3:https://www.chartjs.org/docs/latest/configuration/legend.html
docs2:https://www.chartjs.org/docs/2.6.0/configuration/legend.html
My React app uses react-chartjs-2 (which in turn uses the latest Chart.js 2.7.2). I'm trying to create stacked line charts with a differently styled section between the second-to-last and last x-axis labels, as shown in this example:
How can this be accomplished?
I solved it myself by separating the stacked line data into 2 datasets, to plot as separate stacked plots on the same figure/axes (by including the 2 separate datasets in a single chart's data object).
#Izzi (from comment) here is example:
Link with examle: https://www.chartjs.org/docs/latest/samples/area/line-boundaries.html
Paste this config into editor on the website linked above:
data
const data = {
labels: generateLabels(),
datasets: [
{
label: 'Data A',
data: [40.96,89.06,65.46,45.46,89.55,54.52,71.24,89.1],
borderColor: Utils.CHART_COLORS.red,
backgroundColor: Utils.CHART_COLORS.red,
// look at this setting
fill: 'origin'
},
{
label: 'Data B',
data: [20.96,65.06,15.46,34.46,53.55,24.52,31.24,59.1],
borderColor: Utils.CHART_COLORS.blue,
backgroundColor: Utils.CHART_COLORS.blue,
fill: 'origin'
},
{
label: 'Data C',
data: [20.96,65.06,15.46,34.46,53.55,24.52,31.24,59.1],
borderColor: Utils.CHART_COLORS.green,
backgroundColor: Utils.CHART_COLORS.green,
fill: 'origin'
}
]
};
config
const config = {
type: 'line',
data: data,
options: {
scales: {
y: {
// look at this setting
stacked: true,
}
},
plugins: {
filler: {
propagate: false,
},
title: {
display: true,
text: (ctx) => 'Fill: ' + ctx.chart.data.datasets[0].fill
}
},
interaction: {
intersect: false,
}
},
};
I'm trying to show the chart's information on doughnut chart in % using Chart.js. In this chart it will always contain two parts on each section I need to show the % values. Here is my code
var ctx = document.getElementById("databaseAdded").getContext("2d"),
myChart = new Chart(ctx, {
type: 'doughnut',
data: {
datasets: [{
data: [$scope.graphData.databaseAdded.syspercent,
$scope.graphData.databaseAdded.apppercent],
backgroundColor: [
'#d0b000',
'#bb112e'
],
borderColor: [
'#d0b000',
'#bb112e'
],
borderWidth: 1
}]
},
options: {
showDatasetLabels : true,
cutoutPercentage: 41,
legend: {
display: true,
position:'bottom',
labels: {
fontFamily: "myriadpro-regular",
boxWidth: 15,
boxHeight: 2,
},
}
}
});
One more thing is Legend information is different and label information is different. Legend I can able to get, But I'm facing problem on getting Label Info. Below I upload image that how labels will look like. Please take a look.
Thanks for everything!
You can use the library "Chart PieceLabel".
After you add the script, you probably should add another option: "pieceLabel".
Define how you like.
pieceLabel: {
// mode 'label', 'value' or 'percentage', default is 'percentage'
mode: (!mode) ? 'value' : mode,
// precision for percentage, default is 0
precision: 0,
// font size, default is defaultFontSize
fontSize: 18,
// font color, default is '#fff'
fontColor: '#fff',
// font style, default is defaultFontStyle
fontStyle: 'bold',
// font family, default is defaultFontFamily
fontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif"
}
You can do it with chartjs-plugin-datalabels:
import Chart from 'chart.js'
import ChartDataLabels from 'chartjs-plugin-datalabels'
const myChart = new Chart(ctx, {
plugins: [ChartDataLabels],
options: {
plugins: {
datalabels: {
color: '#ffffff',
formatter: (value) => {
return value + '%'
}
}
}
}
})
In this example you get white labels with % sign appended.