It seems as though the last date label is getting cutoff on my chart here in chart.js. There should be a data point for 2018.
When researching it I've seen it suggested to add layout padding.
I tried that but it disables the chart entirely. Anyone have an alternative solution or an idea on why my layout padding does not work?
var myChart = new Chart(ctx, {
type: 'line',
data: {
labels: dollar.years,
datasets: [
{label: 'Cdn dollar in cents',
data: dollar.vals,
borderColor: 'rgb(153,222,101)',
backgroundColor: 'rgb(153,222,101, 0.2)',
pointRadius: 0,
borderWidth: 6,
}]
},
options: {
responsive: true,
title: {
display: false
},
legend: {
display: false
},
labels: {
padding:1
},
scales: {
yAxes: [{
ticks: {
min: 0,
max: 5,
stepSize: 1
}
}],
xAxes: [{
type: "time",
time: {
unit: "year",
tooltipFormat: "YYYY"
},
ticks: {
display: true,
labelOffset: -1,
maxTicksLimit: 5,
drawOnChartArea: false,
autoSkip: false,
maxRotation: 0,
minRotation: 0,
padding: 5
},
}],
}
}
});
}
The option layout.padding work as below code snippet illustrates. You however need to carefully choose the values (number of pixels) in order to not completely hide the chart area.
I would however rather define xAxes.ticks.max to make sure the tick for 2018 is shown even if data would be available up to 2017 only.
const years = [];
const vals = [];
for (let year = 1968; year <= 2018; year++) {
years.push(year.toString());
vals.push(Math.floor(Math.random() * 3) + 1);
}
var myChart = new Chart(document.getElementById("myChart"), {
type: 'line',
data: {
labels: years,
datasets: [{
label: 'Cdn dollar in cents',
data: vals,
borderColor: 'rgb(153,222,101)',
backgroundColor: 'rgb(153,222,101, 0.2)',
pointRadius: 0,
borderWidth: 6
}]
},
options: {
responsive: true,
layout: {
padding: {
left: 0,
right: 100,
top: 0,
bottom: 0
}
},
legend: {
display: false
},
scales: {
yAxes: [{
ticks: {
min: 0,
max: 4,
stepSize: 1
}
}],
xAxes: [{
type: "time",
time: {
parser: 'YYYY',
unit: "year",
tooltipFormat: "YYYY"
},
ticks: {
max: "2018",
maxTicksLimit: 5,
maxRotation: 0
}
}]
}
}
});
canvas {
max-width: 400px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.bundle.js"></script>
<canvas id="myChart" width="600" height="400"></canvas>
Related
I am trying to create a stacked horizontal bar chart with an average line on each bar using the ChartJS library. I tried several times and searched on the Internet but I did not find out any satisfying answers. I appreciate your helping. Thanks.
Example:
.
In this example, the red line on each bar implies the average value of its group.
To create the stacked horizontal bar chart, please see
https://jsfiddle.net/lamtn862004/9wm1krqf/10/.
var data = {
labels: ["January", "February", "March"],
datasets: [
{
label: "Dogs",
backgroundColor: "rgba(237, 192, 169)",
data: [20, 10, 25],
stack: 1,
xAxisID: 'x-axis-0',
yAxisID: 'y-axis-0'
},
{
label: "Cats",
backgroundColor: "rgba(253, 234, 175)",
data: [70, 85, 65],
stack: 1,
xAxisID: 'x-axis-0',
yAxisID: 'y-axis-0'
},
{
label: "Birds",
backgroundColor: "rgba(179, 211, 200)",
data: [10, 5, 10],
stack: 1,
xAxisID: 'x-axis-0',
yAxisID: 'y-axis-0'
},
]
};
var ctx = document.getElementById("myChart").getContext("2d");
new Chart(ctx, {
type: 'groupableHBar',
data: data,
options: {
scales: {
yAxes: [{
stacked: true,
type: 'category',
id: 'y-axis-0'
}],
xAxes: [{
stacked: true,
type: 'linear',
ticks: {
beginAtZero:true
},
gridLines: {
display: false,
drawTicks: true,
},
id: 'x-axis-0'
},
{
stacked: true,
position: 'top',
type: 'linear',
ticks: {
beginAtZero:true
},
id: 'x-axis-1',
gridLines: {
display: true,
drawTicks: true,
},
display: false
}]
}
}
});
Now, I want to add the average line to each bar (as shown in the image).
Also, do you know the other solutions with open-source libraries for doing this?
The lines can be drawn using floating bars tied to the separate axis y2. To do so, you need to add another dataset as follows (I don't exactly understand what values you want to display, hence I randomly chose 40, 65 and 55):
{
label: "Lines",
backgroundColor: "rgb(255, 0, 0)",
data: [40, 65, 55].map(v => [v - 0.3, v + 0.3]),
yAxisID: 'y2',
order: -1
}
Further you must define a new scales option as shown below:
y2: {
display: false
}
Please take a look at your amended runnable code and see how it works.
var data = {
labels: ["January", "February", "March"],
datasets: [{
label: "Dogs",
backgroundColor: "rgba(237, 192, 169)",
data: [20, 10, 25]
},
{
label: "Cats",
backgroundColor: "rgba(253, 234, 175)",
data: [70, 85, 65]
},
{
label: "Birds",
backgroundColor: "rgba(179, 211, 200)",
data: [10, 5, 10]
},
{
label: "Lines",
backgroundColor: "rgb(255, 0, 0)",
data: [40, 65, 55].map(v => [v - 0.3, v + 0.3]),
yAxisID: 'y2',
order: -1
}
]
};
new Chart('myChart', {
type: 'bar',
data: data,
options: {
indexAxis: 'y',
plugins: {
legend: {
display: false
}
},
scales: {
y: {
stacked: true,
grid: {
display: false
}
},
y2: {
display: false
},
x: {
stacked: true,
beginAtZero: true,
grid: {
display: false
}
}
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.5.1/chart.min.js"></script>
<canvas id="myChart" height="100"></canvas>
I'm using the latest chart.js to draw a simple histogram.
The histogram is fine but I actually need the x labels to be between the borders of every bar like this histogram_right_labels, are there any methods to approach this?
I've tried offsetGridLines: true and offsetGridLines: false, but what they actually did is moving the grid lines and not the labels, unlike what I read about their actual behaviors, I think it might be a conflict in my option settings but I don't know which, any help would be appreciated.
options: {
maintainAspectRatio: false,
layout: {
padding: {
left: 10,
right: 25,
top: 25,
bottom: 0
}
},
scales: {
xAxes: [{
gridLines: {
//display: false,
drawBorder: false,
padding: 20,
offsetGridLines: true
},
ticks: {
beginAtZero: true,
}
}],
yAxes: [{
ticks: {
padding: 10,
},
gridLines: {
color: "rgb(234, 236, 244)",
zeroLineColor: "rgb(234, 236, 244)",
drawBorder: false,
borderDash: [2],
zeroLineBorderDash: [2]
}
}],
},
legend: {
labels: {
boxWidth: 20
},
display: false
},
tooltips: {
backgroundColor: "rgb(255,255,255)",
bodyFontColor: "#858796",
titleMarginBottom: 10,
titleFontColor: '#6e707e',
titleFontSize: 14,
borderColor: '#dddfeb',
borderWidth: 1,
xPadding: 15,
yPadding: 15,
displayColors: false,
intersect: false,
mode: 'index',
caretPadding: 10,
},
}
You can add a second x-axis of type: 'linear' as follows.
{
type: 'linear',
ticks: {
min: 0,
max: labels.length,
stepSize: 1,
callback: (v, i) => i == 0 ? '' : labels[i - 1]
}
}
Note that I use a ticks callback method in order to provide the desired tick label at given index.
Then you should also hide the grid lines and ticks of the default x-axis.
{
gridLines: {
display: false
},
ticks: {
display: false
}
}
Please take a look at below runnable sample code and see how it works.
const labels = ['4.80', '9.60', '14.40', '19.20', '24.00', '28.80'];
new Chart(document.getElementById('myChart'), {
type: 'bar',
data: {
labels: labels,
datasets: [{
label: "My Dataset",
data: [4, 8, 5, 7, 2, 4],
backgroundColor: 'orange',
categoryPercentage: 1,
barPercentage: 1
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}],
xAxes: [{
gridLines: {
display: false
},
ticks: {
display: false
}
},
{
type: 'linear',
ticks: {
min: 0,
max: labels.length,
stepSize: 1,
callback: (v, i) => i == 0 ? '' : labels[i - 1]
}
}
]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.js"></script>
<canvas id="myChart" height="90"></canvas>
you can use this to put the tooltips to the right. Possibilities are top, left, right and bottom
options: {
title: {
display: true,
position: 'right'
}
}
I'm trying to mimic this Radarchart with ChartJs.
How to offset the ticks to the left like so?
what I have (below)
options: {
scale: {
ticks: {
min: 0,
max: 5,
stepSize: 1,
showLabelBackdrop: false,
beginAtZero: true,
},
gridLines: {
color: 'rgba(0, 0, 0, 0.3)'
},
angleLines: {
display: false
},
},
},
Additionally: is displaying the 0 possible?
You need to do two things.
To show the 0 tick add this to your options.scale object:
ticks: {
beginAtZero: true,
min: -0.001,
}
Note that if you set min at zero it will not work. This is how the radar tick engine works.
To add an offset to the label override the tick render callback inside the same object, like this:
ticks: {
callback: (value) => `${value} `,
}
Note the extra spaces at the end. This is the padding. See the sample below
var options = {
responsive: false,
maintainAspectRatio: true,
scale: {
ticks: {
beginAtZero: true,
callback: (value) => `${value} `,
min: -0.001,
max: 5
}
}
};
var dataLiteracy = {
labels: [
"1", "2", "3", "4", "5"
],
datasets: [{
label: "Literacy",
backgroundColor: "rgba(179,181,198,0.2)",
borderColor: "rgba(179,181,198,1)",
pointBackgroundColor: "rgba(179,181,198,1)",
pointBorderColor: "#fff",
pointHoverBackgroundColor: "#fff",
pointHoverBorderColor: "rgba(179,181,198,1)",
data: [
2, 3, 4, 1, 2
]
}]
};
var ctx = document.getElementById("canvas");
var myRadarChart = new Chart(ctx, {
type: 'radar',
data: dataLiteracy,
options: options
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.2.1/Chart.min.js"></script>
<canvas id="canvas" height="400" width="400"></canvas>
Try this in the chart options:
ticks: {
callback: (value) => {
return '${value}';
},
My chart data is working, but I would like the Y axis to start below my lowest value and extend just a bit above the largest value and I was looking at the yAxes-> ticks-> min/max to do this. But when I add this to the options, a second second Y axis label is added with a scale of -1.0 to 1.0; I'm not sure how to get rid of that. I have attached some screen shots and some mocked up js code. Thanks
var chartData = {
labels: ['January', 'February', 'March'],
datasets: [{
type: 'line',
label: 'Dataset 1',
borderColor: 'blue',
borderWidth: 2,
fill: false,
data: [
85, 80, 75
]
}, {
type: 'bar',
label: 'Dataset 2',
backgroundColor: 'red',
data: [
90, 85, 80
],
borderColor: 'white',
borderWidth: 2
}, {
type: 'bar',
label: 'Dataset 3',
backgroundColor: 'green',
data: [
95, 90, 85
]
}]
};
var ctx = document.getElementById('canvas').getContext('2d');
window.myMixedChart = new Chart(ctx, {
type: 'bar',
data: chartData,
options: {
title: {
display: true,
text: 'A Funky Label'
},
tooltips: {
mode: 'index',
intersect: false
},
responsive: true,
scales: {
xAxes: [{
stacked: false
}],
yAxes: [
{
ticks: {
max: 100,
min: 50,
stepSize: 10,
callback: function (value, index, values) {
return value + " HP";
}
}
},
{
stacked: false
}
]
},
layout: {
padding: {
left: 10,
right: 10,
top: 0,
bottom: 0
}
}
}
});
}
I discovered the answer:
I was trying to determine if I wanted a stacked bar chart or regular bar chart with multiple series chart. Anyway, after deciding to stick with the regular bar chart with multiple series I removed this from my options section:
stacked: false
Once removed the second Y axis disappeared
I am plotting bar chart with time axis, X-Axis unit is 'day' and ticks will be 30 day apart.With this tooltip is not displaying. I am using 2.0 beta2 version. Its a 1 year graph with random time sample data. UserCallBack function skips ticks for 30 days.
Any suggestions why tool tip is not displaying?
var canvas = document.getElementById('myChart');
var labelsArray = ["2017/06/09 00:00:00", "2017/07/05 00:00:00"];
var data = {
labels: labelsArray,
datasets: [{
label: "My First dataset",
data: [10, 50],
backgroundColor: "rgba(255,99,132,0.2)",
borderColor: "rgba(255,99,132,1)",
borderWidth: 2,
hoverBackgroundColor: "rgba(255,99,132,0.4)",
hoverBorderColor: "rgba(255,99,132,1)",
}]
};
var xAxesConfig = [{
type: "time",
categoryPercentage: 0.1,
barPercentage: 0.2,
time: {
displayFormat: 'MMM-DD',
format: 'YYYY/MM/DD HH:mm:SS',
unit: 'day',
min: '2016/09/12 17:00:00',
max: '2017/09/12 17:00:00'
},
scaleLabel: {
display: true,
labelString: 'Time',
fontSize: 14,
fontStyle: "bold"
},
ticks: {
maxRotation: 0,
autoSkip: false,
userCallback: function(value, index, values) {
return (index % 30 == 0) ? value : null;
//return value;
}
}
}];
var yAxesConfig = [{
position: 'left',
gridLines: {
display: true
},
ticks: {
maxTicksLimit: 5,
suggestedMin: 0,
suggestedMax: 10
},
scaleLabel: {
display: true,
labelString: 'Value',
fontSize: 14,
fontStyle: "bold"
}
}];
var option = {
scales: {
yAxes: yAxesConfig,
xAxes: xAxesConfig,
}
};
var myBarChart = Chart.Bar(canvas, {
data: data,
options: option
});