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I am trying to use math.js (http://mathjs.org/docs/reference/functions/inv.html) but I can't see how to include it in an HTML file.
I have read that you can include it by adding this to the file:
var math = require('mathjs');
but that didn't work for me
I realize this sounds like a really stupid question but I have tried to figure it out myself and have not been successful.
To answer my question just show a complete HTML file (not just a bit of code from one) that successfully uses math.js
Thanks
I tried what Alexander O'Mara suggested and I got this:
/** * Math.js can easily be extended with functions and variables using the * `import` function. The function `import` accepts a module name or an object * containing functions and variables. */ // load math.js (using node.js) var math = require('../index'); /** * Define new functions and variables */ math.import({ myConstant: 42, hello: function (name) { return 'hello, ' + name + '!'; } }); // defined methods can be used in both JavaScript as well as the parser print(math.myConstant * 2); // 84 print(math.hello('user')); // 'hello, user!' print(math.eval('myConstant + 10')); // 52 print(math.eval('hello("user")')); // 'hello, user!' /** * Import the math library numbers.js, https://github.com/sjkaliski/numbers.js * The library must be installed first using npm: * npm install numbers */ try { // load the numbers.js library var numbers = require('numbers'); // import the numbers.js library into math.js math.import(numbers, {wrap: true, silent: true}); if (math.fibonacci) { // calculate fibonacci print(math.fibonacci(7)); // 13 print(math.eval('fibonacci(7)')); // 13 } } catch (err) { console.log('Warning: To import numbers.js, the library must ' + 'be installed first via `npm install numbers`.'); } /** * Import the math library numeric.js, http://numericjs.com/ * The library must be installed first using npm: * npm install numeric */ try { // load the numeric.js library var numeric = require('numeric'); // import the numeric.js library into math.js math.import(numeric, {wrap: true, silent: true}); if (math.eig) { // calculate eigenvalues of a matrix print(math.eval('eig([1, 2; 4, 3])').lambda.x); // [5, -1]; // solve AX = b var A = math.eval('[1, 2, 3; 2, -1, 1; 3, 0, -1]'); var b = [9, 8, 3]; print(math.solve(A, b)); // [2, -1, 3] } } catch (err) { console.log('Warning: To import numeric.js, the library must ' + 'be installed first via `npm install numeric`.'); } /** * By default, the function import does not allow overriding existing functions. * Existing functions can be overridden by specifying option `override: true` */ math.import({ pi: 3.14 }, { override: true }); print(math.pi); // returns 3.14 instead of 3.141592653589793 /** * Helper function to output a value in the console. Value will be formatted. * @param {*} value */ function print (value) { var precision = 14; console.log(math.format(value, precision)); }
324
You shouldn't use require in the browser. You should try something like this:
<!DOCTYPE HTML>
<html>
<head>
<script src="math.js" type="text/javascript"></script>
</head>
<body>
<script type="text/javascript">
// use math.js
math.sqrt(-4); // 2i
</script>
</body>
</html>
check the docs: http://mathjs.org/docs/getting_started.html
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