问题
I want to invert matrix a but its not working. I need help.
var a = math.inv([[1,2],[3,4]])
console.log(a)
回答1:
Math does not contain a inv method. Therefore you cannot call it.
You can however define your own matrix inversion method as is done here, or you could use the numeric JavaScript library and call it with:
A = [[1,2,3],
[4,5,6],
[7,3,9]];
Ainv = numeric.inv(A);
or use the math.js library and call it with:
math.inv([[1,2],[3,4]])
Notice that you need a surrounding the list of lists with square brackets (here written in boldface).
In that case, a minimal working example would look like:
<html>
<head>
<script language="JavaScript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjs/3.2.1/math.js"></script>
</head>
<body>
<p id="result">loading result...</p>
<script>
var inverted = math.inv([[1,2],[3,4]]);
document.getElementById("result").textContent = JSON.stringify(inverted);
</script>
</body>
</html>回答2:
Your array that represents a matrix should be an array of arrays. Try math.js like this:
var a = math.inv([[1,2],[3,4]])
来源：https://stackoverflow.com/questions/38000569/how-to-invert-a-matrix-in-javascript