Is there a way in which I can create an array of dataset objects and pass that straight into the construction of a chart, rather than manually passing in dataset objects like here:
This works:
myChart[0] = new Chart(ctx, {
type: barbarblackbar,
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [xdata, ydata]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero:true
}
}]
}
}
});
This doesn't:
var datData = { ydata, xdata };
myChart[0] = new Chart(ctx, {
type: barbarblackbar,
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: datData
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero:true
}
}]
}
}
});
I know this may be a simple fix but I have tried everything I can think of
Your 2nd approach will work just fine if you change your definition of datData from an object to an array:
var datData = [ ydata, xdata ];
myChart[0] = new Chart(ctx, {
type: barbarblackbar,
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: datData
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero:true
}
}]
}
}
});
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 want to remove labels from the top of pie chart. but not from mouse hover. if I comment on the labels options it shows undefined when I hover on the chart, how can I achieve that
var ctx = $("#doughnutChart").get(0).getContext('2d');
new Chart(ctx, {
type: 'pie',
data: { // I want to hide this labels.
labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
datasets: [{
label: 'User',
backgroundColor: colors,
data: usersData
}]
},
options: {
responsive: true,
}
});
You can set the legend to display: false in the options like so:
V2:
options: {
legend: {
display: false
}
}
V3:
options: {
plugins: {
legend: {
display: false
}
}
}
V2 example:
var options = {
type: 'pie',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderWidth: 1
}]
},
options: {
legend: {
display: 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"></script>
</body>
V3 example:
var options = {
type: 'pie',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderWidth: 1
}]
},
options: {
plugins: {
legend: {
display: 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/3.2.0/chart.js"></script>
</body>
I am getting the flickering issue as well as zoom issue in charts js.that means I have a bar chart in this some levels are so high means some of them are 20k 30k and some of them 0.1 data so when I hover to the nearest less data bar it vanishes all the charts and it shows me only that charts but I don't want this how to disable that thing.
Real Charts :
the zoom or flickering that issue image :
options: {
legend: {
display: true,
position: 'left',
labels: {
boxWidth:12
}
},
title: {
fontSize: 14,
text: output[k],
display: true
},
responsive: true,
maintainAspectRatio: false,
scales: {
yAxes: [{
ticks: {
beginAtZero:true
},
scaleLabel: {
display: true,
labelString: 'No. of People'
}
}],
xAxes: [{
scaleLabel: {
display: true,
labelString: 'Age Group'
}
}],
}
}
add this on your code to disable zooming Y direction
zoom: {
// Boolean to enable zooming
enabled: false,
// Zooming directions. Remove the appropriate direction to disable
// Eg. 'y' would only allow zooming in the y direction
mode: 'y',
}
exaple:
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3]
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero:true
}
}]
},
pan: {
enabled: true,
mode: 'x',
speed: 1
},
zoom: {
enabled: false,
mode: 'y',
}
}
});
Next time please provide your code
I am using chart js for showing top 3 sold products in last week.
I want to show product name in tooltip for every bar which has obviously different products.
Here is my code :
function productChart() {
var data = {
labels: productHistoryDates,
datasets: [{
label: 'Product 1',
data: productHistoryProducts1,
backgroundColor: "#26B99A"
},
{
label: 'Product 2',
data: productHistoryProducts2,
backgroundColor: "#03586A",
},
{
label: 'Product 3',
data: productHistoryProducts3,
backgroundColor: "#03226A",
}]
};
var ctx = document.getElementById("productChart").getContext("2d");
var myBarChart = new Chart(ctx, {
type: 'bar',
data: data,
options: {
tooltips: {
enabled: true,
mode: 'single',
},
scales: {
yAxes: [{
gridLines: {
display: true
}
}],
xAxes: [{
gridLines: {
display: true
},
barPercentage: 0.8
}]
}
}
});
}
I am getting output like this.
But instead of product 1 label I want product name for that particular bar how can I achieve that ?
I solved it.
by passing an array to the label in data. And rest of the code is as below.
function productChart() {
var data = {
labels: productHistoryDates,
datasets: [{
label: productHistoryProducts1.name,
data: productHistoryProducts1.quantity,
backgroundColor: "#26B99A"
},
{
label: productHistoryProducts2.name,
data: productHistoryProducts2.quantity,
backgroundColor: "#03586A",
},
{
label: productHistoryProducts3.name,
data: productHistoryProducts3.quantity,
backgroundColor: "#03226A",
}]
};
var ctx = document.getElementById("productChart").getContext("2d");
var myBarChart = new Chart(ctx, {
type: 'bar',
data: data,
options: {
tooltips: {
enabled: true,
mode: 'single',
callbacks: {
label: function (tooltipItems, data) {
var tooltip = data.datasets[tooltipItems.datasetIndex].label[tooltipItems.index];
return tooltip;
}
}
},
scales: {
yAxes: [{
gridLines: {
display: true
}
}],
xAxes: [{
gridLines: {
display: true
},
ticks: { mirror: true },
barPercentage: 0.8
}]
}
}
});
}
I want to put the label under the pie.who know please tell me.thank you! here the code.
this.pieChart = new Chart(this.pieCanvas.nativeElement, {
type: 'pie',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
backgroundColor: [
"#ff0000",
"#0000ff",
"#ffff00",
"#008000",
"#800080",
"#ffa500"
]
}]
}
});
You can achieve this by setting the label / legend 's position.
options: {
legend: {
position: 'bottom'
}
}
The full code would be like this ...
this.pieChart = new Chart(this.pieCanvas.nativeElement, {
type: 'pie',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
backgroundColor: [
"#ff0000",
"#0000ff",
"#ffff00",
"#008000",
"#800080",
"#ffa500"
]
}]
},
options: {
legend: {
position: 'bottom'
}
}
});