My code is
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["2015-01", "2015-02"],
datasets: [{
label: '# of Tomatoes',
data: [12, 19],
borderWidth: 1
}, {
label: '# of Oranges',
data: [10, 19],
borderWidth: 1
}]
},
options: {
scales: {
xAxes: [{
stacked: true,
}],
yAxes: [{
stacked: true
}]
}
}
});
<script src="https://cdn.jsdelivr.net/npm/chart.js#2.9.4/dist/Chart.bundle.min.js"></script>
<canvas id="myChart" width="400" height="400"></canvas>
First bar his result is 12 + 10 = 22, but ¿How can I do that result be 2 instead of 22? I would like to minus 12-10, not sum 12+10
Related
I have this chart, starting at 0 and I want the Y axis to begin at 20. It surprises me how there is nothing related to this in the official ChartJS docs. Is this possible in any way?
I have tried several ways to do it, eg. with ticks or min value and so on but nothing worked.
The application is written in Nuxt3 and the ChartJS library used is vue-chart-3.
const options = computed(() => ({
responsive: true,
plugins: {
legend: {
display: false,
},
title: {
display: false,
}
},
scales: {
x: {
stacked: true,
},
y: {
stacked: true,
}
}
}));
const chartData = computed(() => ({
labels: ['Provider'],
datasets: [
{
data: [selectedDataset.value?.score.uncustomized],
backgroundColor: ['#00b7c4'],
},
{
data: [selectedDataset.value?.score.difference],
backgroundColor: ['#204992'],
},
],
}));
const { barChartProps, barChartRef } = useBarChart({
chartData,
options,
});
Any help would be appreciated.
If you want the axis to start at a given number you need to use the min property:
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: {
min: 6
}
}
}
}
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 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>
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 been searching for a solution to this for a while but am getting no nearer to a solution due to the mass of deleted documentation and hacky answers for previous versions of the library.
I'm working on a chart with ChartJS v2 with quarterly-month names along the x-axis, and I've set my labels so that only every 4th label is shown (i.e. one per year). The result is this:
However, I would like to have it such that the tick lines also only appear on every 4th x-axis entry at the same point as the labels. Is this possible?
My current script tag is as follows:
<script>
var ctx = document.getElementById("myChart").getContext('2d');
ctx.canvas.width = 600;
ctx.canvas.height = 420;
var myChart = new Chart(ctx, {
type: 'line',
data: {
< snipped for brevity >
},
options: {
tooltips: {
mode: 'index',
intersect: false
},
scales: {
xAxes: [{
ticks: {
userCallback: function(item, index) {
if (index%4) return "";
return item;
},
autoSkip: false
},
display: true
}],
yAxes: [{
ticks: {
beginAtZero:true
}
}]
}
}
});
</script>
Is this possible to achieve? Thanks in advance.
Replace your tick's userCallback function with the following ...
userCallback: function(item, index) {
if (!(index % 4)) return item;
}
Basically, you don't need to return any empty string for the label that you wish to hide. If you do not return anything (for the label you don't want), it won't draw any tick (as well as gridline) for that label.
ᴅᴇᴍᴏ
var ctx = document.getElementById("myChart").getContext('2d');
var myChart = new Chart(ctx, {
type: 'line',
data: {
labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sept'],
datasets: [{
label: 'Standard Rating',
data: [1, 2, 3, 4, 5, 6, 7, 8, 9],
backgroundColor: 'rgba(209, 230, 245, 0.5)',
borderColor: 'rgba(56, 163, 236, 1)',
borderWidth: 1
}]
},
options: {
responsive: false,
tooltips: {
mode: 'label',
intersect: false
},
scales: {
xAxes: [{
ticks: {
userCallback: function(item, index) {
if (!(index % 4)) return item;
},
autoSkip: false
}
}],
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.min.js"></script>
<canvas id="myChart" width="350" height="200"></canvas>
Please help out how to set bar width for dynamic values. I want fixed width for single value:
var config = {
type: 'bar',
data: {
labels: ["January"],
datasets: [{
type: 'bar',
label: 'Dataset 1',
backgroundColor: "red",
data: [65, 4, 30, 20, 70],
}, {
type: 'bar',
label: 'Dataset 3',
backgroundColor: "blue",
data: [-65]
}]
},
options: {
scales: {
xAxes: [{
stacked: true
}],
yAxes: [{
stacked: true
}]
}
}
};
var ctx = document.getElementById("myChart").getContext("2d");
new Chart(ctx, config);
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.0/Chart.bundle.min.js"></script>
<div style="width:600px">
<canvas id="myChart"></canvas>
</div>