Chartjs columns does not appear by value - chart.js

I am using the following dataset,
this.chart = new Chart(
this.canvasContext,
{
type: 'bar',
data: {
labels: ["Africa", "Asia", "Europe", "Latin America", "North America"],
datasets: [
{
label: "Population (millions)",
backgroundColor: ["#3e95cd", "#8e5ea2","#3cba9f","#e8c3b9","#c45850"],
data: [2478,5267,734,784,433]
}
]
},
options: {
showScale: true,
maintainAspectRatio: false,
responsive: true,
utoutPercentage: 50,
animation: {
animateRotate: true,
duration: 2000,
animateScale: true
}
}
}
)
All columns are appearing.
But If I use the data: [600,400,400,900,1100], 400 values does not appear on chart. They are appearing as zero.
I am using canvas width and height <canvas id="myChart" width="400" height="400"></canvas>
What is the problem?

Check this sandbox:
https://codesandbox.io/s/chartjs-hbjrf
It does work.May be try clearing your cache and then try

Solution here:
this.chart = new Chart(
this.canvasContext,
{
type: 'bar',
data: {
labels: ["Africa", "Asia", "Europe", "Latin America", "North America"],
datasets: [
{
label: "Population (millions)",
backgroundColor: ["#3e95cd", "#8e5ea2","#3cba9f","#e8c3b9","#c45850"],
data: [2478,5267,734,784,433]
}
]
},
options: {
showScale: true,
maintainAspectRatio: false,
responsive: true,
utoutPercentage: 50,
animation: {
animateRotate: true,
duration: 2000,
animateScale: true
},
scales: {
xAxes: [
{
stacked: true
}
],
yAxes: [
{
stacked: true
}
]
}
}
}
)
Just add 1 more option about scales x and y axes.

Related

chart.js datalabel over x-axis

chart error
I have an issue while using chart.js.
I set initial data to show on chart. (from 0 index to 15 index of data),
the datalabel of line chart is over the X-Axis after drawing chart.
Here is my code.
<Chart
type="bar"
height={500}
options={{
plugins: {
zoom: {
pan: {
enabled: true,
mode: 'x',
threshold: 10,
},
zoom: {
wheel: {
enabled: true,
speed: 0.3,
},
pinch: {
enabled: true,
},
mode: 'x',
},
},
},
maintainAspectRatio: false,
responsive: true,
layout: {
padding: 10,
},
scales: {
xAxis: {
stacked: true,
min: 0,
max: 15,
},
yAxis: {
stacked: true,
beginAtZero: true,
title: {
display: true,
},
ticks: {
maxTicksLimit: 10,
},
min: 0,
afterDataLimits: scale => {
scale.max = scale.max * 1.2;
},
},
},
}}
data={{
labels: xAxisNameList, // ex : ['2023.01.25', '2023.01.26']
datasets: dataSetList, //
}}
/>
And This is my data set list.
const dataSetList: any[] = [
{
data: data,
datalabels: {
align: 'end',
anchor: 'start',
display: true,
},
},
{
label: `...`,
data: data,
parsing: {
yAxisKey: `...`,
},
datalabels: {
anchor: 'end',
align: 'start',
clamp: true,
display: true,
},
},
];
And here is my package.json
"chart.js": "^3.9.1",
"chartjs-plugin-datalabels": "^2.2.0",
"chartjs-plugin-zoom": "^2.0.0",
"react-chartjs-2": "^4.3.1"
I want to datalabels inside chart graph Whenever I zoom or pan this chart.

Using ticks 'major' with Chart.js is overlapping with an unknown text

Using the following ticks config with Chart.js is overlapping with an unknown text only when the xAxes results are less than 7.
major: {
enabled: true
}
Here is my code:
options: {
scales: {
xAxes: [
{
type: 'time',
distribution: 'series',
display: true,
ticks: {
beginAtZero: false,
autoSkip: true,
maxTicksLimit: 10,
maxRotation: 0,
responsive: true,
legend: {
display: false,
},
major: {
enabled: true
}
}
}
]
}
}
The issue is bellow:
It's hard to guess the cause of your problem without seeing more of your code. In below runnable code snippet I use the same options as you and it works just fine.
Please make sure to use the most recent stable version of Chart.js (currently v2.9.3) and check if this solves your problem.
new Chart('chart', {
type: 'line',
data: {
datasets: [{
label: 'things',
borderColor: 'blue',
backgroundColor: 'lightblue',
data: [
{ t: new Date("05/01/2020"), y: 2 },
{ t: new Date("05/02/2020"), y: 0 },
{ t: new Date("05/03/2020"), y: 1 },
{ t: new Date("05/04/2020"), y: 7 },
{ t: new Date("05/05/2020"), y: 6 },
{ t: new Date("05/06/2020"), y: 4 }
]
}]
},
options: {
scales: {
xAxes: [{
type: 'time',
distribution: 'series',
ticks: {
beginAtZero: false,
autoSkip: true,
maxTicksLimit: 10,
maxRotation: 0,
responsive: true,
legend: {
display: false,
},
major: {
enabled: true
}
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.bundle.min.js"></script>
<canvas id="chart" height="90"></canvas>

How can I set the yAxis scale for the chart?

I need to set the yAxis scale so that it would start from zero to 100 with the intervals of 10. I tried several options with the scales but it didn't seem to work. I also tried to set
options: { scales: { yAxes: [{ ticks: { beginAtZero:true } }] } } });
but this didn't help, I still have negative numbers at the yAxis scale. How can I solve it?
var MONTHS = ["Январь", "Февраль", "Март", "Апрель", "Май", "Июнь", "Июль", "Август", "Сентябрь", "Октябрь", "Ноябрь", "Декабрь"];
var config = {
type: 'line',
data: {
labels: ["Январь", "Февраль", "Март", "Апрель", "Май", "Июнь", "Июль", "Август", "Сентябрь", "Октябрь", "Ноябрь", "Декабрь"],
datasets: [{
label: "Продажи",
backgroundColor: window.chartColors.red,
borderColor: window.chartColors.red,
data: [
10,
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor()
],
fill: false,
}]
},
options: {
responsive: true,
title:{
display:true,
text:'Показатели роста продаж'
},
tooltips: {
mode: 'index',
intersect: false,
},
hover: {
mode: 'nearest',
intersect: true
},
scales: {
xAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Месяц'
}
}],
yAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Рост'
}
}]
}
}
};
window.onload = function() {
var ctx = document.getElementById("chart-0").getContext("2d");
window.myLine = new Chart(ctx, config);
};
You need to set the ticks property of yAxes options. Refer the below code or fiddle -> http://jsfiddle.net/Lzo5g01n/10/
Always make sure you reference the latest version of Chart.js library.
yAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Рост'
},
ticks:{
min: 0,
max: 100,
beginAtZero: true,
stepSize: 5
}
}]

How to show different product name for every bar in chart js

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
}]
}
}
});
}

Draw two plots using chartjs over one another with transparency

In Chartjs I have two plots, as shown here:
var config = {
type: 'line',
data: {
labels: [
"2017-07-03T01:05:00+0100",
....
],
datasets: [
{
label: "Consumption",
fill: 'origin',
pointRadius: 0,
borderColor: "#0000ff",
backgroundColor: "rgba(255,10,13,255)",
data: [
0.015625,
0.0199861111111,
...
],
}
,
{
fill: 'origin',
label: "PV",
pointRadius: 0,
borderColor: "#ebf909",
backgroundColor: "rgba(29,241,13,210)",
data: [
0.0,
.....
],
}
]
},
options: {
responsive: true,
title:{
display:true,
text:"Chart.js Line Chart - Stacked Area"
},
tooltips: {
mode: 'index',
},
hover: {
mode: 'index'
},
scales: {
xAxes: [{
scaleLabel: {
display: true,
labelString: 'Time'
}
}],
yAxes: [{
stacked: false,
scaleLabel: {
display: true,
labelString: 'kWh'
}
}]
}
}
};
var ctx = document.getElementById("canvas").getContext("2d");
var myChart = new Chart(ctx, config);
Is there any way I can make the green plot show through the red one in places where the latter completely obscures the former?
You need to set fill property to false for the first dataset (the red one), to make it transparent.
datasets: [{
label: "Consumption",
fill: false,
pointRadius: 0,
borderColor: "#0000ff",
backgroundColor: "rgba(255,10,13,255)",
...
or, you can also reduce the opacity of background color, like so ...
backgroundColor: "rgba(255, 10, 13, 0.1)"
Here is the working codepen