Math.js库的使用

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Math.js库的使用

可以使用npm或Bower来安装Math.js，直接从Web网站下载，或者通过内容发布网络（CDN）来方法。它可以用于浏览器中，或者用于Node应用程序中。它提供了一组函数来执行操作，例如 add()和multiply()等，支持链化使用。
特征：

Supports numbers, big numbers, complex numbers, fractions, units, strings, arrays, and matrices.
Is compatible with JavaScript’s built-in Math library.
Contains a flexible expression parser.
Does symbolic computation.
Comes with a large set of built-in functions and constants.
Has no dependencies. Runs on any JavaScript engine.
Can be used as a command line application as well.
Is easily extensible.
Open source.

<!DOCTYPE html><html><head>  <meta name="description" content="math.js | basic usage">  <title>math.js | basic usage</title>  <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjs/3.14.2/math.min.js"></script></head><body>  <script>    // functions and constants    print(math.round(math.e, 3));            // 2.718    print(math.atan2(3, -3) / math.pi);      // 0.75    print(math.log(10000, 10));              // 4    print(math.sqrt(-4));                    // 2i    print(math.pow([[-1, 2], [3, 1]], 2));   // [[7, 0], [0, 7]]    print(math.derivative('x^2 + x', 'x'));  // 2 * x + 1    // expressions    print(math.eval('12 / (2.3 + 0.7)'));    // 4    print(math.eval('12.7 cm to inch'));     // 5 inch    print(math.eval('9 / 3 + 2i'));          // 3 + 2i    print(math.eval('det([-1, 2; 3, 1])'));  // -7    // chaining    var a = math.chain(3)        .add(4)        .multiply(2)        .done();    print(a); // 14    // helper function to output formatted results.    function print(value) {      var precision = 14;      document.write(math.format(value, precision) + '<br>');    }  </script></body></html>

下载网站
+ website: http://mathjs.org
+ docs: http://mathjs.org/docs
+ examples: http://mathjs.org/examples

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