mathjs/docs/reference/functions/ones.md

Function ones

Create a matrix filled with ones. The created matrix can have one or multiple dimensions.

Syntax

math.ones(m)
math.ones(m, format)
math.ones(m, n)
math.ones(m, n, format)
math.ones([m, n])
math.ones([m, n], format)
math.ones([m, n, p, ...])
math.ones([m, n, p, ...], format)

Parameters

Parameter	Type	Description
size	...number | Array	The size of each dimension of the matrix
format	string	The Matrix storage format

Returns

Type	Description
Array | Matrix | number	A matrix filled with ones

Examples

math.ones(3);                   // returns [1, 1, 1]
math.ones(3, 2);                // returns [[1, 1], [1, 1], [1, 1]]
math.ones(3, 2, 'dense');       // returns Dense Matrix [[1, 1], [1, 1], [1, 1]]

var A = [[1, 2, 3], [4, 5, 6]];
math.ones(math.size(A));       // returns [[1, 1, 1], [1, 1, 1]]

See also

zeros, eye, size, range