Develop Reference

Multi line chart data displays incorrectly but shows correct number

First to start of, It's most likely a common question but I am way too sleep deprived right now to be able to figure it out (I did try though haha)
Anyways the issue I am having is with multi axis line chart
I have 7 different lines with data ranging anywhere from 1 digit number to 5 digits numbers (eg. line 1 ranges from 10000-30000 while line 2 ranges between 0 and 9)
Now my issue is that the lines scale incorrectly, line 2 appears larger than line 1 even though the difference is massive (check the image, green line is the one with 34 as value yet it appears larger than all other lines
what am I missing to fix this?
const data = {
labels: lbs,
datasets: [
{
label: 'Regular',
data: <?php echo $regularjs;?>,
fill: true,
backgroundColor: 'rgba(194, 143, 68, 0.1)',
borderColor: 'rgb(194, 143, 68)',
yAxisID: 'y',
tension: 0.4,
},
{
label: 'Feed',
data: <?php echo $feedjs;?>,
fill: true,
backgroundColor: 'rgba(68, 194, 160, 0.1)',
borderColor: 'rgb(68, 194, 160)',
yAxisID: 'y1',
tension: 0.4,
},
{
label: 'Recents',
data: <?php echo $recentsjs;?>,
fill: true,
backgroundColor: 'rgba(156, 68, 194, 0.1)',
borderColor: 'rgb(156, 68, 194)',
yAxisID: 'y2',
tension: 0.4,
},
{
label: 'Search',
data: <?php echo $searchjs;?>,
fill: true,
backgroundColor: 'rgba(194, 68, 68, 0.1)',
borderColor: 'rgb(194, 68, 68)',
yAxisID: 'y3',
tension: 0.4,
},
{
label: 'Popular',
data: <?php echo $popularjs;?>,
fill: true,
backgroundColor: 'rgba(179, 194, 68, 0.1)',
borderColor: 'rgb(179, 194, 68)',
yAxisID: 'y4',
tension: 0.4,
},
{
label: 'Profile',
data: <?php echo $profilejs;?>,
fill: true,
backgroundColor: 'rgba(68, 81, 194, 0.1)',
borderColor: 'rgb(68, 81, 194)',
yAxisID: 'y5',
tension: 0.4,
},
{
label: 'Recommended',
data: <?php echo $recommendedjs;?>,
fill: true,
backgroundColor: 'rgba(194, 68, 123, 0.1)',
borderColor: 'rgb(194, 68, 123)',
yAxisID: 'y6',
tension: 0.4,
}
]
};
const config = {
type: 'line',
data: data,
options: {
responsive: true,
interaction: {
mode: 'index',
intersect: false,
},
stacked: false,
plugins: {
title: {
display: true,
text: 'Daily Pack Visits'
},
legend:{display: true}
},
scales: {
y: {
type: 'linear',
display: true,
position: 'left',
beginAtZero: true,
},
y1: {
type: 'linear',
display: true,
position: 'right',
beginAtZero: true,
grid: {drawOnChartArea: false,},
ticks: {
display: false
}
},
y2: {
type: 'linear',
display: true,
position: 'right',
beginAtZero: true,
grid: {drawOnChartArea: false,},
ticks: {
display: false
}
},
y3: {
type: 'linear',
display: true,
position: 'right',
beginAtZero: true,
grid: {drawOnChartArea: false,},
ticks: {
display: false
}
},
y4: {
type: 'linear',
display: true,
position: 'right',
beginAtZero: true,
grid: {drawOnChartArea: false,},
ticks: {
display: false
}
},
y5: {
type: 'linear',
display: true,
position: 'right',
beginAtZero: true,
grid: {drawOnChartArea: false,},
ticks: {
display: false
}
},
y6: {
type: 'linear',
display: true,
position: 'right',
beginAtZero: true,
grid: {drawOnChartArea: false,},
ticks: {
display: false
}
}
}
},
};
const dailypacks = new Chart(
document.getElementById('daily-visits'),
config
);
graph

This is because you map each dataset to its own y axis. This means the y axis will go from min to max for that dataset so it looks like its wrong.
If you want your data represented so its scalled correctly you just need to remove the yAxisID option in each dataset. With this removed they all fall back to the default which is y so you only have 1 scale.
This will show the data correctly scaled

How to hide grid lines and x-axis labels in chart.js?

I'm using chart.js v3.2.0 and I want to disable the grid lines and x-axis labels. I've tried various examples from other stack overflow posts but none seem to work.
https://jsfiddle.net/gcp95hjf/1/
html
<div style = "width: 600px; height: 400px;">
<canvas id="chartJSContainer" width="1" height="400"></canvas>
</div>
js
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,
backgroundColor: 'rgba(255, 99, 132, 0.2)',
borderColor: 'rgba(255, 99, 132,1)'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderWidth: 1,
backgroundColor: 'rgba(54, 162, 235, 0.2)',
borderColor: 'rgba(54, 162, 235, 1)'
}
]
},
options: {
scales: {
xAxes: [{
display: false,
ticks: {
display: false //this will remove only the label
}
}],
yAxes: [{
display:false
}]
},
responsive: true,
maintainAspectRatio: false
}
}
var ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
Does anyone know how to do it?
Thanks

Chart.js v3 has multiple breaking changes, one of them is how you define the scales, it is stated in the migration guide and shown in a lot of the examples (https://www.chartjs.org/docs/3.2.1/getting-started/v3-migration.html)
You will have to change scales: { yAxes: [], xAxes: []} to scales: { y: {}, x: {}}
Working fiddle: https://jsfiddle.net/Leelenaleee/r26h71fm/2/

Hide GridLines on Both Axis -
ChartJS v2 (older version) -
scales: {
x: [
{
gridLines: {
display: false,
},
},
],
y: [
{
gridLines: {
display: false,
},
},
],
},
Newer Version ChartJS v3 -
scales: {
x: {
grid: {
display: false,
},
},
y: {
grid: {
display: false,
},
},
},

How to setup or show all tool-tip text by default without hover

I am working on one project where i am using Charts.js for showing charts, Here i want to show all bar values by default on top of each bar (Using bar chat), when we hover mouse on that bar it shows value, but is there any was to show that tooltip by default without hover on it
Below fiddle is the example, Here in this fiddle i want to show 60,30,40 as default on bar chart by default without taking hover on it.
Here in above screenshot i have tried to put all the tooltip as by default but as there are 3 charts are used it shows tooltip to all the charts but I want to put tooltip to only bar chart, I know it's bit tricky but there will be some way using which i can resolve my issue.
Please guide me, here is my code snipped of JS
getchart();
function getchart() {
$("#barChart").remove();
const decimals = 3;
$(".chart").append("<canvas id='barChart' width='692' height='346'></canvas>");
var ctx = document.getElementById("barChart");
Chart.pluginService.register({
beforeRender: function(chart) {
if (chart.config.options.showAllTooltips) {
chart.pluginTooltips = [];
chart.config.data.datasets.forEach(function(dataset, i) {
chart.getDatasetMeta(i).data.forEach(function(sector, j) {
console.log(chart);
chart.pluginTooltips.push(new Chart.Tooltip({
_chart: chart.chart,
_chartInstance: chart,
_data: chart.data,
_options: chart.options.tooltips,
_active: [sector]
}, chart));
});
});
}
chart.options.tooltips.enabled = false;
},
afterDraw: function(chart, easing) {
if (chart.config.options.showAllTooltips) {
if (!chart.allTooltipsOnce) {
if (easing !== 1)
return;
chart.allTooltipsOnce = true;
}
chart.options.tooltips.enabled = true;
Chart.helpers.each(chart.pluginTooltips, function(tooltip) {
tooltip.initialize();
tooltip.update();
tooltip.pivot();
tooltip.transition(easing).draw();
});
chart.options.tooltips.enabled = false;
}
}
})
var barChart;
barChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ['30', '45', '60', '90', '120', '120+'],
datasets: [{
type: 'bar',
label: 'Receivable',
data: [730, 492.5, 120, 4732.5, 2760.85, 0],
backgroundColor: 'rgba(75, 192, 192, 0.2)',
borderColor: 'rgba(75, 192, 192, 1)',
borderWidth: 1
}, {
type: 'line',
label: 'Past Due',
data: [1500, 1500, 1500, 1500, 1500, 1500],
backgroundColor: 'rgba(255, 99, 132, 0.2)',
borderColor: 'rgba(255,99,132,1)',
borderWidth: 1
}, {
type: 'line',
label: 'Invoice',
data: [1000, 1000, 1000, 1000, 1000, 1000],
backgroundColor: 'rgba(75, 00, 150, 0.2)',
borderColor: 'rgba(75, 00, 150,1)',
borderWidth: 2
}]
},
options: {
scales: {
xAxes: [{
display: true,
stacked: true,
scaleLabel: {
display: true,
labelString: 'Days'
},
}],
yAxes: [{
display: true,
stacked: true,
scaleLabel: {
display: true,
labelString: 'Dollar Amount'
},
ticks: {
beginAtZero: true,
}
}, {
id: 'invoice-amount',
display: false,
stacked: false,
scaleLabel: {
display: false,
labelString: 'Dollar Amount'
},
ticks: {
beginAtZero: true,
}
}]
},
showAllTooltips: true,
}
});
}

Chart.js multicolored fill sections

I have a chart which contains blue or green data points depending on the value of a point.
Is it possible to change the fill color beneath these points to reflect their value as well?
Similar to this codepen https://codepen.io/jordanwillis/pen/BWxErp using a gradient of colors switching between them under each data point.
Below is my chart switching between colored datapoints.
var chartColors = {
blue: 'rgb(54, 162, 235)',
green: 'rgb(75, 192, 192)'
}
// x-axis labels
var chartData = {
labels: ['1/1/2018', '2/1/2018', '3/1/2018', '4/1/2018', '5/1/2018', '6/1/2018', '7/1/2018'],
datasets: [
{label: 'Light',
fill: true,
borderColor: window.chartColors.blue,
pointBackgroundColor: [],
pointBorderColor: [],
pointRadius: 10,
pointHoverRadius: 10,
data: data1},
]
};
window.onload = function() {
var config = document.getElementById("canvas").getContext("2d");
window.myLine = Chart.Line(config, {
type: "line",
data: chartData,
options: {
responsive: true,
title: {
display: true,
text: ['Light Intensity'],
fontSize: 14
},
tooltips: {
mode: 'index',
intersect: false,
},
hover: {
mode: 'nearest',
intersect: true
},
scales: {
xAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Date (3 day intervals)'
},
type: 'linear',
position: 'bottom',
ticks: {
max: 59,
min: 0,
stepSize: 10,
callback: function(value, index, values) {
return chartData.labels[index];
}
}
}],
yAxes: [{
display: true,
ticks:{min: 0, max: 400, reverse: false},
scaleLabel: {
display: true,
labelString: 'Photosynthetically Available Radiation'
}
}]
}
}
});
};
// change colors of points here
function algeaFill(respiration, depth){
var dataPoints = [];
lightAvgs = [65.3, 33.14, 22.01, 34.74, 26.58, 38.49, 48.12, 44.3, 28.55, 28.92, 37.21, 38.13, 42.49, 44.65, 80.62, 104.66, 87.16, 72.72, 91.07, 93.89, 113.01, 109.56, 110.08, 126.43, 128.98,
165.52, 196.73, 156.93, 140.41, 130.24, 164.14, 150.28, 127.09, 134.54, 129.89, 115.30, 181.71, 259.52, 269.57, 241.86, 221.29, 212.84, 246, 271.05, 238.03, 250.05, 256.02, 236.56, 259.93,
286.6, 283.94, 298.4, 279.81, 256.37, 262.98, 236.18, 305.79, 318.73, 289.67, 277.52];
for(var i = 0; i < 60; i++){
if(lightAvgs[i] <= depth){
window.myLine.data.datasets[0].pointBackgroundColor[i] = "green";
}else{
window.myLine.data.datasets[0].pointBackgroundColor[i] = "blue";
}
dataPoints.push({x: i, y: lightAvgs[i]});
}
return dataPoints;
}
// call algeaFill
window.myLine.data.datasets[0].data = algeaFill(respirationSlider.value, depthSlider.value);
window.myLine.update();
});

in each dataset object insert backgroundColor and pointBackgroundColor properties.
backgroundColor: 'rgb(54, 162, 235)',
pointBackgroundColor: 'rgb(54, 162, 235)'

Hide empty bars in Grouped Stacked Bar Chart - chart.js

I am using chart.js version 2.5.0 and need to know if there any way to hide the empty bars from each group in a grouped stacked bar chart? Some data values in chart datasets can be null.
Here is what I want:
Combo Chart Type (Grouped and Stacked)
var options = {
responsive: true,
maintainAspectRatio: false,
tooltips: {
mode: 'label',
callbacks: {
label: function(tooltipItem, data) {
var dataset = data.datasets[tooltipItem.datasetIndex];
if (tooltipItem.index == 0 && tooltipItem.datasetIndex !== 0)
return null;
return dataset.label + ': ' + numeral(dataset.data[tooltipItem.index]).format('($ 0.0 a)');
}
}
},
scales: {
xAxes: [{
display: true,
gridLines: {
display: true
},
labels: {
show: true
}
}],
yAxes: [{
type: "linear",
display: true,
position: "left",
id: "y-axis-1",
gridLines: {
display: false
},
labels: {
show: false
}
}, {
type: "linear",
display: true,
gridLines: {
display: true
},
labels: {
show: true
},
ticks: {
beginAtZero: false,
userCallback: function(value) {
return numeral(value).format('($ 0.0 a)');
}
}
}, {
type: "linear",
display: false,
gridLines: {
display: false
},
labels: {
show: true
}
}, {
type: "linear",
display: false,
gridLines: {
display: false
},
labels: {
show: true
}
}, {
type: "linear",
display: false,
gridLines: {
display: false
},
labels: {
show: true
}
}, {
type: "linear",
display: false,
id: "y-axis-5",
gridLines: {
display: false
},
labels: {
show: true
}
}]
},
legend: {
labels: {
fontSize: 11,
usePointStyle: true,
padding: 15,
filter: (legendItem, chartData) => {
if (legendItem.datasetIndex > 0) return true;
}
}
}
}
var data = {
labels: ["Opening Balance", "Qtr-1", "Qtr-2", "Qtr-3", "Qtr-4"],
datasets: [{
type: 'bar',
label: "Opening Balance",
data: [1120000],
fill: true,
backgroundColor: 'rgba(243, 194, 0, .3)',
borderWidth: 1,
borderColor: '#F3C200',
hoverBackgroundColor: '#F3C200',
hoverBorderColor: '#7d6505',
stack: 'OB'
}, {
type: 'bar',
label: "Income",
data: [, 210000, 258900, 475669, 402569],
fill: true,
backgroundColor: 'rgba(42, 180, 192, .3)',
borderWidth: 1,
borderColor: '#166269',
hoverBackgroundColor: '#2ab4c0',
hoverBorderColor: '#2ab4c0',
stack: 'Income'
}, {
type: 'bar',
label: "Income Expected",
data: [, 215000, 320000, 412236, 385569],
fill: true,
backgroundColor: 'rgba(76, 135, 185, .4)',
borderWidth: 1,
borderColor: '#2a587f',
hoverBackgroundColor: '#4c87b9',
hoverBorderColor: '#2a587f',
stack: 'Income'
}, {
type: 'bar',
label: "Expenditures",
data: [, 204560, 256987, 236981, 365587],
fill: true,
backgroundColor: 'rgba(243, 82, 58, .3)',
borderWidth: 1,
borderColor: '#f3523a',
hoverBackgroundColor: '#f56954',
hoverBorderColor: '#f3523a',
stack: 'Expenditures'
}, {
type: 'bar',
label: "Expenditures Expected",
data: [, 269877, 325698, 435887, 423369],
fill: true,
backgroundColor: 'rgba(228, 58, 69, .4)',
borderWidth: 1,
borderColor: '#b32a33',
hoverBackgroundColor: '#e43a45',
hoverBorderColor: '#b32a33',
stack: 'Expenditures'
}, {
label: "Balance",
type: 'bar',
data: [, 54400, 19013, 14569, 24998],
fill: true,
borderColor: '#1ebfae',
backgroundColor: 'rgba(30, 191, 174, .3)',
borderWidth: 1,
hoverBackgroundColor: '#1ebfae',
hoverBorderColor: '#099486',
stack: 'Balance'
}]
};
new Chart(document.getElementById("fundStatus").getContext('2d'), {
type: 'bar',
data: data,
options: options
});
The fiddle: https://jsfiddle.net/q_sabawoon/atLxLg7x/
Please help.

This problem can be solved by defining two separate x-axes as follows:
xAxes: [{
id: 'opening',
display: false
},
{
id: 'quarter',
offset: true,
gridLines: {
offsetGridLines: true
}
}]
Then link the datasets with option xAxisID to their corresponding x-axis:
datasets: [{
label: "Opening Balance",
...
xAxisID: "opening"
}, {
label: "Income",
...
xAxisID: "quarter" // the same for all other datasets
}
...
Please take a look at your amended code and see how it works.
var options = {
responsive: true,
maintainAspectRatio: false,
tooltips: {
mode: 'label',
callbacks: {
label: function(tooltipItem, data) {
var dataset = data.datasets[tooltipItem.datasetIndex];
if (tooltipItem.index == 0 && tooltipItem.datasetIndex !== 0)
return null;
return dataset.label + ': ' + numeral(dataset.data[tooltipItem.index]).format('($ 0.0 a)');
}
}
},
scales: {
xAxes: [{
id: 'opening',
display: false
},
{
id: 'quarter',
offset: true,
gridLines: {
offsetGridLines: true
}
}
],
yAxes: [{
ticks: {
beginAtZero: false,
userCallback: function(value) {
return numeral(value).format('($ 0.0 a)');
}
}
}]
},
legend: {
labels: {
fontSize: 11,
usePointStyle: true,
padding: 15,
filter: (legendItem, chartData) => {
if (legendItem.datasetIndex > 0) return true;
}
}
}
}
var data = {
labels: ["Opening Balance", "Qtr-1", "Qtr-2", "Qtr-3", "Qtr-4"],
datasets: [{
label: "Opening Balance",
data: [1120000],
backgroundColor: 'rgba(243, 194, 0, .3)',
borderWidth: 1,
borderColor: '#F3C200',
hoverBackgroundColor: '#F3C200',
hoverBorderColor: '#7d6505',
stack: 'OB',
categoryPercentage: 0.6,
xAxisID: "opening"
}, {
label: "Income",
data: [,210000, 258900, 475669, 402569],
backgroundColor: 'rgba(42, 180, 192, .3)',
borderWidth: 1,
borderColor: '#166269',
hoverBackgroundColor: '#2ab4c0',
hoverBorderColor: '#2ab4c0',
stack: 'Income',
categoryPercentage: 1,
xAxisID: "quarter"
}, {
label: "Income Expected",
data: [,215000, 320000, 412236, 385569],
backgroundColor: 'rgba(76, 135, 185, .4)',
borderWidth: 1,
borderColor: '#2a587f',
hoverBackgroundColor: '#4c87b9',
hoverBorderColor: '#2a587f',
stack: 'Income',
categoryPercentage: 1,
xAxisID: "quarter"
}, {
label: "Expenditures",
data: [,204560, 256987, 236981, 365587],
backgroundColor: 'rgba(243, 82, 58, .3)',
borderWidth: 1,
borderColor: '#f3523a',
hoverBackgroundColor: '#f56954',
hoverBorderColor: '#f3523a',
stack: 'Expenditures',
categoryPercentage: 1,
xAxisID: "quarter"
}, {
label: "Expenditures Expected",
data: [,269877, 325698, 435887, 423369],
backgroundColor: 'rgba(228, 58, 69, .4)',
borderWidth: 1,
borderColor: '#b32a33',
hoverBackgroundColor: '#e43a45',
hoverBorderColor: '#b32a33',
stack: 'Expenditures',
categoryPercentage: 1,
xAxisID: "quarter"
}, {
label: "Balance",
data: [,54400, 19013, 14569, 24998],
borderColor: '#1ebfae',
backgroundColor: 'rgba(30, 191, 174, .3)',
borderWidth: 1,
hoverBackgroundColor: '#1ebfae',
hoverBorderColor: '#099486',
stack: 'Balance',
categoryPercentage: 1,
xAxisID: "quarter"
}]
};
const chart = new Chart("fundStatus", {
type: 'bar',
data: data,
options: options
});
#fundStatus {
min-height: 400px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/numeral.js/2.0.6/numeral.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.js"></script>
<canvas id="fundStatus"></canvas>