I have written the following code:
<!DOCTYPE html>
<html lang = "en">
<head>
<meta charset = "UTF-8">
<meta name = viewport" content ="width=device-width, intial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content = "ie=edge">
<script src=".js/2.7.2/Chart.min.js"></script>
<link rel ="stylesheet" href = ".1.3/css/bootstrap.min.css">
<title>My Chart.js</title>
</head>
<body>
<div class = "container">
<canvas id="myChart"></canvas>
</div>
<script>
var c = [];
var randomNumber = Math.random()*190;
function getRandomDataPoint(x){
if (x == "x"){
var _return
return Math.random()*20;
}
else if (x == "y"){
return Math.random()*10 + randomNumber;
}
else{
}
}
var xPoints = [];
var yPoints = [];
var storage = [];
for(var i=0;i<100;i++)
{
xPoints[i] = Math.random()*20;
yPoints[i] = Math.random()*10 + randomNumber;
x = xPoints[i];
y = yPoints[i];
var json = {x: x, y: y};
storage.push(json);
}
var concatenatedArray = xPoints.concat(yPoints);
let myChart = document.getElementById('myChart');//.getContext('2d');
Chart.defaults.global.defaultColor = '#000000';
let massPopChart = new Chart(myChart, {
type: 'scatter',
data: {
datasets: [{label: 'Data Set', data: [storage]}],
},
options: {
scales: {
yAxes: [{
ticks: {
max: 200,
min: 0,
beginAtZero:true
},
}]
}
}
});
</script>
</body>
</html>
What I would like for this code to do is take 100 random data points and plot them using the for-loop depicted in the code. The issue is the current set of code does create the axis however no data appears to be plotted. Thank you for any help.
Best Regards
I have written the following code:
<!DOCTYPE html>
<html lang = "en">
<head>
<meta charset = "UTF-8">
<meta name = viewport" content ="width=device-width, intial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content = "ie=edge">
<script src="https://cdnjs.cloudflare./ajax/libs/Chart.js/2.7.2/Chart.min.js"></script>
<link rel ="stylesheet" href = "https://stackpath.bootstrapcdn./bootstrap/4.1.3/css/bootstrap.min.css">
<title>My Chart.js</title>
</head>
<body>
<div class = "container">
<canvas id="myChart"></canvas>
</div>
<script>
var c = [];
var randomNumber = Math.random()*190;
function getRandomDataPoint(x){
if (x == "x"){
var _return
return Math.random()*20;
}
else if (x == "y"){
return Math.random()*10 + randomNumber;
}
else{
}
}
var xPoints = [];
var yPoints = [];
var storage = [];
for(var i=0;i<100;i++)
{
xPoints[i] = Math.random()*20;
yPoints[i] = Math.random()*10 + randomNumber;
x = xPoints[i];
y = yPoints[i];
var json = {x: x, y: y};
storage.push(json);
}
var concatenatedArray = xPoints.concat(yPoints);
let myChart = document.getElementById('myChart');//.getContext('2d');
Chart.defaults.global.defaultColor = '#000000';
let massPopChart = new Chart(myChart, {
type: 'scatter',
data: {
datasets: [{label: 'Data Set', data: [storage]}],
},
options: {
scales: {
yAxes: [{
ticks: {
max: 200,
min: 0,
beginAtZero:true
},
}]
}
}
});
</script>
</body>
</html>
What I would like for this code to do is take 100 random data points and plot them using the for-loop depicted in the code. The issue is the current set of code does create the axis however no data appears to be plotted. Thank you for any help.
Best Regards
Share asked Sep 21, 2018 at 11:09 user3371137user3371137 1053 silver badges9 bronze badges 1-
function
getRandomDataPoint(x)is not used everywhere, so you can delete it. – cho_uc Commented Mar 12, 2022 at 11:49
1 Answer
Reset to default 4The problem is in how you pass your data values to Chart.js on this line:
datasets: [{label: 'Data Set', data: [storage]}],
Specifically, data is supposed to be an array of objects. Because you have added the square brackets ([]) you are passing an 'array of array of objects'.
The problem can be fixed simply by removing the brackets:
data: storage
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