I have a stacked barchart for which I can pass a border color to each stack. Passing the same borderColor to each stack would also result in a border in the middle(yAxis=1.0) of the barchart.
I want to create a single outer border is this possible?
You can specify the borderwidth as an object and then set the with of the border to 0 where the stacks meet
Example:
var options = {
type: 'bar',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderWidth: 1,
borderColor: 'red',
borderWidth: {
top: 0,
left: 1,
right: 1
}
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderWidth: 1,
borderColor: 'blue',
borderWidth: {
bottom: 0,
top: 1,
left: 1,
right: 1
}
}
]
},
options: {
scales: {
y: {
stacked: true
},
x: {
stacked: 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/3.2.0/chart.js"></script>
</body>
Related
Is there anyway to remove this overflowing section of the gridlines?
This is exactly what I'm looking for:
I've seen a few post from years ago with this question and none of them have really yielded any results. Those were so long ago that I pray that a fix has happened since then.
Cheers!
You can set tickLength to 0 in the grid options. To make the ticks still appear a bit away from the scale you can use the padding option:
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: {
scales: {
y: {
ticks: {
padding: 4,
crossAlign: 'far'
},
grid: {
tickLength: 0
}
},
x: {
grid: {
tickLength: 0
}
}
}
}
}
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 have a radar chart and I'd like to display the value for the tick at the center of the chart over the center. My r scale is set up as follows, and my data is an integer ranging from 1-5.
scales: {
r: {
min: 1,
max: 5,
ticks: {
stepSize: 1,
z: 10,
},
},
},
Over the center of the radar chart, I'd like the tick value displayed, like it's displayed for all other values. Setting my min to 0 (one step size lower than my actual min) displays my ticks, but I'd like the center of my graph to be labeled instead of having a minimum size between the center and the first tick.
You will need to use a custom plugin to draw it on the canvas yourself 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'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'orange'
}
]
},
options: {
plugins: {
centerTick: {
//color: 'grey' // Set custom color for y
}
}
},
plugins: [{
id: 'centerTick',
afterDraw: (chart, args, opts) => {
const {
ctx
} = chart;
ctx.fillStyle = opts.color || Chart.defaults.color;
ctx.fillText(chart.scales.r.min, chart.scales.r.xCenter - (ctx.measureText(chart.scales.r.min).width / 2), chart.scales.r.yCenter)
}
}]
}
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/3.7.0/chart.js"></script>
</body>
I'm trying to make a legend with a perfect box, but I don't know how, the "Nível Op. Max" is not like the others,I think the reason this happens is because it's a dotted line and the others are solid lines.
Does anyone know if there is any property in chart.js that causes the square's edge to not be dotted?
My code:
legend: {
display: true,
labels: {
fontSize: 10,
boxWidth: 10
}
The way I want:
You can provide a custom generateLabels function and dont provide the setting for making the border dashed 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',
borderDash: [2, 2]
}
]
},
options: {
plugins: {
legend: {
labels: {
generateLabels: (chart) => {
const datasets = chart.data.datasets;
const {
labels: {
usePointStyle,
pointStyle,
textAlign,
color
}
} = chart.legend.options;
return chart._getSortedDatasetMetas().map((meta) => {
const style = meta.controller.getStyle(usePointStyle ? 0 : undefined);
const borderWidth = Chart.helpers.toPadding(style.borderWidth);
return {
text: datasets[meta.index].label,
fillStyle: style.backgroundColor,
fontColor: color,
hidden: !meta.visible,
lineCap: style.borderCapStyle,
lineDashOffset: style.borderDashOffset,
lineJoin: style.borderJoinStyle,
lineWidth: (borderWidth.width + borderWidth.height) / 4,
strokeStyle: style.borderColor,
pointStyle: pointStyle || style.pointStyle,
rotation: style.rotation,
textAlign: textAlign || style.textAlign,
borderRadius: 0,
datasetIndex: meta.index
};
})
}
}
}
}
}
}
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>
I am setting the startAngle on my polar chart so the first category starts on the -180 degrees.
But I can't figure out why the data point labels don't correspondingly adjust and rotate. As a result, they show up incorrectly against the wrong data. As you can see in the image, Question 6 still appears where Question 1 should be. The tooltips on each section do appear correctly.
Note: When I use the datalabels plugin, it does show the label correctly. But I am not using it because it does not wrap the labels and also it cuts off the labels if they become too big. In addition I had responsiveness problems with it.
So please suggest a solution without that plugin if possible.
Thank you very much for helping me out.
const mydata = {
labels: [
'Question1',
'Question2',
'Question3',
'Question4',
'Question5',
'Question6'
],
datasets: [{
label: 'Data labels don't move',
data: [5, 8, 6, 6, 7, 8],
backgroundColor: [
'rgb(255, 99, 132)',
'rgb(75, 192, 192)',
'rgb(255, 205, 86)',
'rgb(201, 203, 207)',
'rgb(255, 99, 132)',
'rgb(201, 203, 207)'
]
}]
};
var myChart = new Chart('mychartId'),
{
type: "polarArea",
data: mydata,
options:
{
responsive: true,
cutoutPercentage: 20,
startAngle: -1 * Math.PI,
legend: {
display: false
},
layout: {
padding: 20
},
scale: {
ticks: {
max: 10,
beginAtZero: true,
min: 1,
stepSize: 1,
display: false
},
angleLines: {
display: false
},
pointLabels: {
display: true
}
}
}
}
sample image showing the problem
Update to V3, there they do turn with the chart if you adjust the startAngle
var options = {
type: 'polarArea',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [2, 9, 3, 5, 2, 3],
borderWidth: 1
}]
},
options: {
scales: {
r: {
startAngle: 180,
ticks: {
display: false
},
pointLabels: {
display: 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/3.6.0/chart.js"></script>
</body>
V3 has some breaking changes over V2, for all of them you can read the migration guide
type: 'scatter'
Now first one is on the top. Is it possible to show different charts on the top?
picture
In your dataset array you can put a type to put a different type in there. The order of the datasets in the array decide the draw order of them.
var options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 13, 3, 5, 2, 3],
borderWidth: 1
},
{
type: 'bar',
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderWidth: 1,
backgroundColor: 'red'
}
]
},
options: {
scales: {
yAxes: [{
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/2.9.4/Chart.js" integrity="sha512-hZf9Qhp3rlDJBvAKvmiG+goaaKRZA6LKUO35oK6EsM0/kjPK32Yw7URqrq3Q+Nvbbt8Usss+IekL7CRn83dYmw==" crossorigin="anonymous"></script>
</body>