mathjs
Version:
Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with numbers, big numbers, complex numbers, units, and matrices.
69 lines (59 loc) • 1.42 kB
HTML
<html>
<head>
<title>math.js | plot</title>
<script src="../../dist/math.js"></script>
<!-- load http://maurizzzio.github.io/function-plot/ -->
<script src="http://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script src="https://wzrd.in/standalone/function-plot@1.14.0"></script>
<style>
input[type=text] {
width: 300px;
}
input {
padding: 6px;
}
body, html, input {
font-family: sans-serif;
font-size: 11pt;
}
form {
margin: 20px 0;
}
</style>
</head>
<body>
<form id="form">
<label for="eq">Enter an equation:</label>
<input type="text" id="eq" value="4 * sin(x) + 5 * cos(x/2)" />
<input type="submit" value="Draw" />
</form>
<div id="plot"></div>
<p>
Plot library: <a href="https://github.com/maurizzzio/function-plot">https://github.com/maurizzzio/function-plot</a>
</p>
<script>
function draw() {
try {
functionPlot({
target: '#plot',
data: [{
fn: document.getElementById('eq').value,
sampler: 'builtIn', // this will make function-plot use the evaluator of math.js
graphType: 'polyline'
}]
});
}
catch (err) {
console.log(err);
alert(err);
}
}
document.getElementById('form').onsubmit = function (event) {
event.preventDefault();
draw();
};
draw();
</script>
</body>
</html>