I really need some help to figure this out...
I have found a code which plot a chart out of values he gets from a website.
This is close what I would like to achieve.
But I dont want to get the values from the website but from a txt file.
I read that I should use json strings to convert it, but I'm not a programmer so I don't understand how to do such thing.
At the end of my question I have the code that get its value from the internet.
The txt file needs for now to be just easy like:
[[0, 7], [1, 12], [2, 7], [3, 3], [4, 0], [5, 4]]
The code
<!DOCTYPE HTML>
<html>
<head>
<script>
//chart
window.onload = function() {
var dataPoints = [];
var chart = new CanvasJS.Chart("chartContainer", {
theme: "light2",
title: {
text: "Live Data"
},
data: [{
type: "line",
dataPoints: dataPoints
}]
});
updateData();
// Initial Values
var xValue = 0;
var yValue = 10;
var newDataCount = 6;
function addData(data) {
if (newDataCount != 1) {
$.each(data, function(key, value) {
dataPoints.push({
x: value[0],
y: parseInt(value[1])
});
xValue++;
yValue = parseInt(value[1]);
});
} else {
//dataPoints.shift();
dataPoints.push({
x: data[0][0],
y: parseInt(data[0][1])
});
xValue++;
yValue = parseInt(data[0][1]);
}
newDataCount = 1;
chart.render();
setTimeout(updateData, 1500);
}
function updateData() {
$.getJSON("https://canvasjs.com/services/data/datapoints.php?xstart=" + xValue + "&ystart=" + yValue + "&length=" + newDataCount + "type=json", addData);
}
}
</script>
</head>
<body>
<div id="chartContainer" style="height: 370px; width: 100%;"></div>
<script src="https://canvasjs.com/assets/script/jquery-1.11.1.min.js"></script>
<script src="https://canvasjs.com/assets/script/jquery.canvasjs.min.js"></script>
</body>
</html>
question from:
https://stackoverflow.com/questions/65864814/javascript-readin-txt-file-into-chart 与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
