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.

mathjs.org

josdejong/mathjs

54 lines (32 loc) • 1.34 kB

Markdown

View Raw

# Function norm Calculate the norm of a number, vector or matrix. The second parameter p is optional. If not provided, it defaults to 2. ## Syntax ```js math.norm(x) math.norm(x, p) ``` ### Parameters Parameter | Type | Description --------- | ---- | ----------- `x` | Number | BigNumber | Complex | Boolean | Array | Matrix | null | Value for which to calculate the norm `p` | Number | String | Vector space. Supported numbers include Infinity and -Infinity. Supported strings are: 'inf', '-inf', and 'fro' (The Frobenius norm) Default value: 2. ### Returns Type | Description ---- | ----------- Number | the p-norm ## Examples ```js math.abs(-3.5); // returns 3.5 math.norm(-3.5); // returns 3.5 math.norm(math.complex(3, -4)); // returns 5 math.norm([1, 2, -3], Infinity); // returns 3 math.norm([1, 2, -3], -Infinity); // returns 1 math.norm([3, 4], 2); // returns 5 math.norm([[1, 2], [3, 4]], 1) // returns 6 math.norm([[1, 2], [3, 4]], 'inf'); // returns 7 math.norm([[1, 2], [3, 4]], 'fro'); // returns 5.477225575051661 ``` ## See also [abs](abs.md)