Function eye

Create a 2-dimensional identity matrix with size m x n or n x n. The matrix has ones on the diagonal and zeros elsewhere.

Syntax

eye(n)
eye(n, format)
eye(m, n)
eye(m, n, format)
eye([m, n])
eye([m, n], format)

Parameters

Parameter Type Description
size ...number | Matrix | Array The size for the matrix
format string The Matrix storage format

Returns

Type Description
Matrix | Array | number A matrix with ones on the diagonal.

Examples

eye(3);                    // returns [[1, 0, 0], [0, 1, 0], [0, 0, 1]]
eye(3, 2);                 // returns [[1, 0], [0, 1], [0, 0]]

var A = [[1, 2, 3], [4, 5, 6]];
eye(size(A));         // returns [[1, 0, 0], [0, 1, 0]]

See also

diag, ones, zeros, size, range