This code creates a line chart using Chart.js to display Nifty PCR COI and Bank Nifty PCR COI data that is being fetched from a Google Sheets spreadsheet. The chart is shown in a canvas element and the data is updated every interval set by setInterval(). The zoom plugin for Chart.js is also being used for zooming in the chart but **Zoom plugin not working i want to zoom with fingers in touch enabled devices
**
How can i solve this issue
<html>
<head>
</head>
</body>
<script src="https://cdn.jsdelivr.net/npm/chart.js#2.9.3/dist/Chart.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/hammerjs#2.0.8"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-zoom#0.7.7/dist/chartjs-plugin-zoom.min.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<div id="loader" style="display: flex; justify-content: center; align-items: center; height: 400px; background-color: #f2f2f2">
<div style="text-align: center; font-size: 2em; font-weight: bold; color: #3e95cd;">Loading...</div>
</div>
<canvas id="myChart" width="400" height="400" style="display: none;"></canvas>
<script>
const ctx = document.getElementById('myChart').getContext('2d');
fetch('https://script.googleusercontent.com/macros/echo?user_content_key=r9CiwwP04Rh83CglKNwLbJw3zKlvAIWVj4Yf9a5cT3CPRmlxaBB9bOAMnkFV2os4ee10iaj9S7HNOU5axJWhdXmuYbHPVyWnm5_BxDlH2jW0nuo2oDemN9CCS2h10ox_1xSncGQajx_ryfhECjZEnC4mxGG_R4juVl897H-HHcU5jBSu36oRyKZzBJteCuzXZ2p8eeHkRfjTV-mrMKhBOgim2y6bAoCZpSiZg9-Rh7EUjhE06fNngtz9Jw9Md8uu&lib=MQ0aMrcKwzFLX_7mD1gjcTxV-kV6j6m2N')
.then(response => response.json())
.then(data => {
document.getElementById("loader").style.display = "none";
document.getElementById("myChart").style.display = "block";
const chartData = {
labels: data.map(d => d.TimeCOI).reverse(),
datasets: [
{
label: 'Nifty PCR COI',
data: data.map(d => d.Nifty_PCR_COI).reverse(),
borderColor: '#3e95cd',
fill: false,
lineTension: .3,
pointRadius: 2,
pointBackgroundColor: '#3e95cd'
},{
label: 'Bank Nifty PCR COI',
data: data.map(d => d.Bank_Nifty_PCR_COI).reverse(),
borderColor: '#c65e3e',
fill: false,
lineTension: .3,
pointRadius: 2,
pointBackgroundColor: '#c65e3e'
}
]
};
const chartOptions = {
responsive: false,
zoom: {
enabled: true,
mode: 'x',
drag: true,
speed: 0.05
},
scales: {
y: {
beginAtZero: true,
position: 'right'
}
}
};
const chart = new Chart(ctx, {
type: 'line',
data: chartData,
options: chartOptions
});
setInterval(() => {
fetch('https://script.googleusercontent.com/macros/echo?user_content_key=r9CiwwP04Rh83CglKNwLbJw3zKlvAIWVj4Yf9a5cT3CPRmlxaBB9bOAMnkFV2os4ee10iaj9S7HNOU5axJWhdXmuYbHPVyWnm5_BxDlH2jW0nuo2oDemN9CCS2h10ox_1xSncGQajx_ryfhECjZEnC4mxGG_R4juVl897H-HHcU5jBSu36oRyKZzBJteCuzXZ2p8eeHkRfjTV-mrMKhBOgim2y6bAoCZpSiZg9-Rh7EUjhE06fNngtz9Jw9Md8uu&lib=MQ0aMrcKwzFLX_7mD1gjcTxV-kV6j6m2N')
.then(response => response.json())
.then(newData => {
chart.data.labels = newData.map(d => d.TimeCOI).reverse();
chart.data.datasets[0].data = newData.map(d => d.Nifty_PCR_COI).reverse();
chart.data.datasets[1].data = newData.map(d => d.Bank_Nifty_PCR_COI).reverse();
chart.update();
});
}, 1000);
});
</script>
</body>
</html>
Any one can help me ?
Related
I tried to add multiple charts in one page, but had the error Canvas is already in use. Chart with ID '0' must be destroyed before the canvas can be reused.
After research, I read that I had to set my canvas in div because :
Detecting when the canvas size changes can not be done directly from the CANVAS element. Chart.js uses its parent container to update the canvas render and display sizes. However, this method requires the container to be relatively positioned and dedicated to the chart canvas only. Responsiveness can then be achieved by setting relative values for the container size
So I did, but I still have the same error.
//chart1
const ctx = document.getElementById('chart1').getContext('2d')
const data1 = {
labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
}]
}
const options1 = {
scales: {
y: {
beginAtZero: true
}
}
}
const myChart1 = new Chart(ctx, {
type: 'doughnut',
data: data1,
options: options1
})
//chart2
const ctx2 = document.getElementById('chart2').getContext('2d')
const data2 = {
labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
}]
}
const options2 = {
scales: {
y: {
beginAtZero: true
}
}
}
const myChart2 = new Chart(ctx, {
type: 'line',
data: data2,
options: options2
})
<!DOCTYPE html>
<html lang="fr">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>GraphJS</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.7.1/chart.min.js" integrity="sha512-QSkVNOCYLtj73J4hbmVoOV6KVZuMluZlioC+trLpewV8qMjsWqlIQvkn1KGX2StWvPMdWGBqim1xlC8krl1EKQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
</head>
<body>
<div style="width: 400px; height: 400px; margin: 0 auto 100px auto;">
<h1 style="text-align: center;">Tier 1</h1>
<canvas id="chart1"></canvas>
</div>
<div style="width: 400px; height: 400px; margin: 0 auto 100px auto;">
<h1 style="text-align: center;">Category</h1>
<canvas id="chart2"></canvas>
</div>
<script src="./index.js"></script>
</body>
</html>
Any idea where is my mistake ?
You are passing ctx as a parameter for chart2, which should be ctx2. Right now both of your graphs are pointing to same document element i.e. to element with id chart1.
const myChart2 = new Chart(ctx2, {
type: 'line',
data: data2,
options: options2
})
Just do this
This is my first Django project, and I am working on a Django html template that should contain a Chart.JS bar graph (https://www.chartjs.org/docs/latest/charts/bar.html) alongside a Highcharts drilldown map of the US (https://www.highcharts.com/demo/maps/map-drilldown).
I've successfully implemented my Chart.JS bar graph and passed data to it from our AWS RDS. But now when I try to implement even just the stock Highcharts code from their website, the map fails to render at all. After trying to isolate the problem, I've found that the map does render if I simply delete "context" from the return statement in my view (i.e. delete "context" from the final line in my first block of code below). But this obviously then inhibits my bar graph from rendering. I think I must be missing something with how the highcharts data is loaded in the presence of other context data, but I've been unable to fix it such that both the graph and map render. Any help would be greatly appreciated!
My Django View:
def index(request):
mydb = mysql.connector.connect(
host=xxxx,
user=xxxx,
password=xxxx,
database=xxxx
)
mycursor = mydb.cursor()
mycursor.execute("WITH CS1 AS (SELECT cts.Name, cts.State, m.Frequently, m.Always FROM Masks m JOIN Counties cts ON (m.FIPS = cts.FIPS)) SELECT CS1.State, AVG((CS1.Frequently+CS1.Always)*100) AS Perc_High_Frequency FROM CS1 WHERE CS1.State<>'Puerto Rico' GROUP BY CS1.State ORDER BY Perc_High_Frequency DESC")
tempList = mycursor.fetchall()
statesMaskName = [item[0] for item in tempList]
statesMaskPerc = [item[1] for item in tempList]
context={'statesMaskName':statesMaskName, 'statesMaskPerc':statesMaskPerc}
return render(request,'index.html', context)
The relevant HTML/JS:
<html lang="en" dir="ltr">
<head>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
</head>
<body>
<div class="fixed-header">
<h1>COVID-19 Sentiment and Mask Practices</h1>
</div>
<div>
<div class="col-lg-3" style="float: left; max-height: 6500px;max-width:400px;overflow: scroll; overflow-x:hidden;">
<div style="background-color: #17202A;">
<span style="color: #F7F9F9; text-align: center;"><h4>% Population Who "Frequently" or "Always" Wear Masks When In Public Within 6" of Others (as of July 2-14, 2020)</h4></span>
</div>
<div class="col-lg-12">
<form method="post" enctype="multipart/form-data" action="selectState">
{% csrf_token %}
<div class="col-lg-4" style="float: left; max-height: 3000px;">
<br><br style="line-height: 15px"/>
{% for state in statesMaskName %}
<table style="border-width: 2px; border: #333;">
<tr>
<input type="submit" value="{{state}}" name="statesMaskName" style="width:130px;">
</tr>
</table>
{% endfor%}
</div>
<div style="float: left;">
<canvas id="myChart" height="1360" width="250"></canvas>
</div>
</form>
</div>
</div>
<div class="col-lg-6">
</div>
<div class="col-lg-3">
</div>
</div>
<br>
</body>
<!--my updated code for chartjs graph-->
<script>
const labels = {{statesMaskName|safe}};
const data = {
labels: labels,
datasets: [{
label: '% Population',
color: 'orange',
backgroundColor: 'orange',
borderColor: 'orange',
data: {{statesMaskPerc|safe}},
}]
};
const config = {
type: 'bar',
data,
options: {
indexAxis: 'y',
color: 'white',
scales: {
y: {
grid: {
color: '#b3b1ad',
},
ticks: {
color: 'white',
},
display: false
},
x: {
grid: {
color: '#b3b1ad',
},
ticks: {
color: 'white',
// Include a % sign in the ticks
callback: function(value, index, values) {
return value + '%';
}
}
}
}
}
};
var myChart = new Chart(
document.getElementById('myChart'),
config
);
</script>
<!--stock code for highcharts map-->
<div id="usMap" style="height: 500px; min-width: 310px; max-width: 800px; margin: 0 auto"></div>
<script src="https://code.highcharts.com/maps/highmaps.js"></script>
<script src="https://code.highcharts.com/maps/modules/data.js"></script>
<script src="https://code.highcharts.com/maps/modules/drilldown.js"></script>
<script src="https://code.highcharts.com/maps/modules/exporting.js"></script>
<script src="https://code.highcharts.com/maps/modules/offline-exporting.js"></script>
<script src="https://code.highcharts.com/mapdata/countries/us/us-all.js"></script>
<link href="https://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.css" rel="stylesheet">
<script type="text/javascript">
/*
TODO:
- Check data labels after drilling. Label rank? New positions?
*/
let data = Highcharts.geojson(Highcharts.maps['countries/us/us-all']);
const separators = Highcharts.geojson(Highcharts.maps['countries/us/us-all'], 'mapline');
// Set drilldown pointers
data.forEach((d, i) => {
d.drilldown = d.properties['hc-key'];
d.value = i; // Non-random bogus data
});
function getScript(url, cb) {
const script = document.createElement('script');
script.src = url;
script.onload = cb;
document.head.appendChild(script);
}
// Instantiate the map
Highcharts.mapChart('usMap', {
chart: {
events: {
drilldown: function (e) {
if (!e.seriesOptions) {
const chart = this,
mapKey = 'countries/us/' + e.point.drilldown + '-all';
// Handle error, the timeout is cleared on success
let fail = setTimeout(() => {
if (!Highcharts.maps[mapKey]) {
chart.showLoading('<i class="icon-frown"></i> Failed loading ' + e.point.name);
fail = setTimeout(() => {
chart.hideLoading();
}, 1000);
}
}, 3000);
// Show the spinner
chart.showLoading('<i class="icon-spinner icon-spin icon-3x"></i>'); // Font Awesome spinner
// Load the drilldown map
getScript('https://code.highcharts.com/mapdata/' + mapKey + '.js', () => {
data = Highcharts.geojson(Highcharts.maps[mapKey]);
// Set a non-random bogus value
data.forEach((d, i) => {
d.value = i;
});
// Hide loading and add series
chart.hideLoading();
clearTimeout(fail);
chart.addSeriesAsDrilldown(e.point, {
name: e.point.name,
data: data,
dataLabels: {
enabled: true,
format: '{point.name}'
}
});
});
}
this.setTitle(null, { text: e.point.name });
},
drillup: function () {
this.setTitle(null, { text: '' });
}
}
},
title: {
text: 'Highcharts Map Drilldown'
},
subtitle: {
text: '',
floating: true,
align: 'right',
y: 50,
style: {
fontSize: '16px'
}
},
colorAxis: {
min: 0,
minColor: '#E6E7E8',
maxColor: '#005645'
},
mapNavigation: {
enabled: true,
buttonOptions: {
verticalAlign: 'bottom'
}
},
plotOptions: {
map: {
states: {
hover: {
color: '#EEDD66'
}
}
}
},
series: [{
data: data,
name: 'USA',
dataLabels: {
enabled: true,
format: '{point.properties.postal-code}'
}
}, {
type: 'mapline',
data: separators,
color: 'silver',
enableMouseTracking: false,
animation: {
duration: 500
}
}],
drilldown: {
activeDataLabelStyle: {
color: '#FFFFFF',
textDecoration: 'none',
textOutline: '1px #000000'
},
drillUpButton: {
relativeTo: 'spacingBox',
position: {
x: 0,
y: 60
}
}
}
});
</script>
</html>
Right now I'm using onHover into each pie to add some scale/zoom, but I want to use mouseenter and mouseleave. So on mouseenter on each pie it will add some scale/zoom, and on mouseleave, I want it back to its original state.
either mouseenter-mouseleave or mouseover-mouseout is fine.
here is the codepen:
https://codepen.io/graydirt/pen/NWNZNyQ
Thanks guys!
var ctx = document.getElementById('chartPie').getContext('2d');
var myChart = new Chart(ctx, {
type: 'pie',
data: {
labels: ['Red', 'Blue', 'Green'],
datasets: [{
label: '# of Votes',
data: [12, 19, 20],
backgroundColor: [
'red',
'blue',
'green'
],
datalabels: {
color: '#000'
}
}]
},
options: {
legend: {
display: false
},
layout: {
padding: 5
},
onHover: function (evt, elements) {
let segment;
if (elements && elements.length) {
segment = elements[0];
this.chart.update();
selectedIndex = segment["_index"];
segment._model.outerRadius += 5;
} else {
if (segment) {
segment._model.outerRadius -= 5;
}
segment = null;
}
}
}
});
.chart-pie {
width: 400px;
height: 400px;
margin: auto;
}
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chart.js#2.8.0"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels#0.7.0"></script>
<div class="container p-4">
<div class="chart-pie position-relative">
<canvas id="chartPie"></canvas>
</div>
</div>
Your code is already designed to return to the original size on mouseout, but you have a subtle bug.
You need to define the segment variable outside the chart. With a saved reference to the segment, the mouseout event will fire and the onHover handler will return the pie to its original size.
Please see the attached example below:
let segment;
var ctx = document.getElementById('chartPie').getContext('2d');
var myChart = new Chart(ctx, {
type: 'pie',
data: {
labels: ['Red', 'Blue', 'Green'],
datasets: [{
label: '# of Votes',
data: [12, 19, 20],
backgroundColor: [
'red',
'blue',
'green'
],
datalabels: {
color: '#000'
}
}]
},
options: {
legend: {
display: false
},
layout: {
padding: 5
},
onHover: function(evt, elements) {
if (elements && elements.length) {
segment = elements[0];
this.chart.update();
selectedIndex = segment["_index"];
segment._model.outerRadius += 5;
} else {
if (segment) {
segment._model.outerRadius -= 5;
}
segment = null;
}
}
}
});
.chart-pie {
width: 400px;
height: 400px;
margin: auto;
}
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chart.js#2.8.0"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels#0.7.0"></script>
<div class="container p-4">
<div class="chart-pie position-relative">
<canvas id="chartPie"></canvas>
</div>
</div>
I am using Chart.js and this API to create a line graph of covid-19 cases in Australia.
However, the API data is not loading in the chart until I do something like inspect an element on the page or resize the window.
Here is my JS file:
window.onload = function() {
let dates = [];
let confirmedCases = [];
let confirmedRecovered = [];
let confirmedDeaths = [];
function addArrayFunc(date, confirmed, recovered, deaths) {
dates.push(date);
confirmedCases.push(confirmed);
confirmedRecovered.push(recovered);
confirmedDeaths.push(deaths);
}
fetch("https://pomber.github.io/covid19/timeseries.json")
.then(response => response.json())
.then(cases => {
cases["Australia"].forEach(({
date,
confirmed,
recovered,
deaths
}) =>
addArrayFunc(date, confirmed, recovered, deaths)
)
})
const ctx = document.getElementById('myChart').getContext('2d');
new Chart(ctx, {
type: 'line',
data: {
labels: dates,
datasets: [{
label: 'Confirmed',
borderColor: 'pink',
backgroundColor: 'pink',
fill: 'false',
data: confirmedCases
},
{
label: 'Recovered',
borderColor: 'blue',
backgroundColor: 'blue',
fill: 'false',
data: confirmedRecovered
},
{
label: 'Deaths',
borderColor: 'green',
backgroundColor: 'green',
fill: 'false',
data: confirmedDeaths
}
]
},
options: {
responsive: true,
title: {
display: true,
text: 'Covid-19 Cases in Australia'
},
}
});
}
Here is my html file:
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Confirmed Covid-19 cases in Australia</title>
<style>
canvas {
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
width: 75%;
}
</style>
<script src="script.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chart.js#2.8.0"></script>
</head>
<body>
<canvas id="myChart"></canvas>
</body>
</html>
I believe I am creating the chart before the data has arrived from the URL but I have no idea have to rectify that. Is this something async/await or watch could fix? How would I go implementing that?
Any help would be greatly appreciated.
Since fetch makes an asynchronous call, you need to create your chart once the response is received. Therefore, simply place the chart creation code inside .then and it will work as shown below.
window.onload = function() {
let dates = [];
let confirmedCases = [];
let confirmedRecovered = [];
let confirmedDeaths = [];
function addArrayFunc(date, confirmed, recovered, deaths) {
dates.push(date);
confirmedCases.push(confirmed);
confirmedRecovered.push(recovered);
confirmedDeaths.push(deaths);
}
fetch("https://pomber.github.io/covid19/timeseries.json")
.then(response => response.json())
.then(cases => {
cases["Australia"].forEach(({
date,
confirmed,
recovered,
deaths
}) =>
addArrayFunc(date, confirmed, recovered, deaths)
)
new Chart(document.getElementById('myChart'), {
type: 'line',
data: {
labels: dates,
datasets: [{
label: 'Confirmed',
borderColor: 'pink',
backgroundColor: 'pink',
fill: 'false',
data: confirmedCases
},
{
label: 'Recovered',
borderColor: 'blue',
backgroundColor: 'blue',
fill: 'false',
data: confirmedRecovered
},
{
label: 'Deaths',
borderColor: 'green',
backgroundColor: 'green',
fill: 'false',
data: confirmedDeaths
}
]
},
options: {
responsive: true,
title: {
display: true,
text: 'Covid-19 Cases in Australia'
},
}
});
});
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.min.js"></script>
<canvas id="myChart" height="90"></canvas>
I have a large data set which, when graphed have several vertical sections as shown below. Chart.js formats these sections with thin, semi-transparent coloring. I want to format these to match the regular, thicker and solid line style.
The dataset itself is normally in a separate file called data.js, but I linked a portion of it from a CodePen.
<!DOCTYPE html>
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.js"></script>
<!--
NOT USED FOR THIS EXAMPLE
<script src="data.js"></script>
-->
<script src="https://codepen.io/EtherealBug/pen/wjOdoa.js"></script>
</head>
<body>
<canvas id="myChart"></canvas>
</body>
<style>
canvas {
width: 100% !important;
max-width: 2000px;
height: auto !important;
}
</style>
<script>
var labels = jsonfile.jsonarray.map(function(e) {
return e.Time;
});
var data = jsonfile.jsonarray.map(function(e) {
return e.Speed;
});
var ctx = myChart.getContext('2d');
var config = {
options: {
legend: {
position: 'bottom',
},
scales: {
xAxes: [{
scaleLabel: {
fontSize: 12,
fontStyle: 'bold',
display: true,
labelString: 'Y(1)'
},
ticks: {
autoSkip: true,
maxTicksLimit: 30,
},
}],
},
},
type: 'line',
data: {
labels: labels,
datasets: [{
fill: false,
label: 'Graph Line',
data: data,
backgroundColor: 'rgba(0, 119, 204, 0.3)'
}]
}
};
var chart = new Chart(ctx, config);
</script>
</html>
I figured it out, what you're seeing when you look at the graph is actually mostly just the individual points. Due to the large number of point data, it wasn't apparent at first, but the lines were thinner than the points width.
The vertical lines being so much thinner are actually because those are formatted with the line settings. By setting the transparency of the points color and border to 0, and by reformatting the line settings, I got was able to format it the way I intended. Sample below for reference should anyone else have a similar issue in the future.
<!DOCTYPE html>
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.js"></script>
<!--
NOT USED FOR THIS EXAMPLE
<script src="data.js"></script>
-->
<script src="https://codepen.io/EtherealBug/pen/wjOdoa.js"></script>
</head>
<body>
<canvas id="myChart"></canvas>
</body>
<style>
canvas {
width: 100% !important;
max-width: 2000px;
height: auto !important;
}
</style>
<script>
var labels = jsonfile.jsonarray.map(function(e) {
return e.Time;
});
var data = jsonfile.jsonarray.map(function(e) {
return e.Speed;
});
var ctx = myChart.getContext('2d');
var config = {
options: {
legend: {
position: 'bottom',
},
scales: {
xAxes: [{
scaleLabel: {
fontSize: 12,
fontStyle: 'bold',
display: true,
labelString: 'Y(1)'
},
ticks: {
autoSkip: true,
maxTicksLimit: 30,
},
}],
},
},
type: 'line',
data: {
labels: labels,
datasets: [{
lineTension: 0.4, //defaul val = 0.4
pointBackgroundColor: 'rgba(0,0,0,0)',
pointBorderColor: 'rgba(0,0,0,0)',
borderColor: 'black',
borderWidth: 4,
fill: false,
label: 'Graph Line',
data: data,
}]
}
};
var chart = new Chart(ctx, config);
</script>
</html>
Note: I'll accept this answer when it allows me in 2 days since it's my own.