Documentation/How Tos/Calc: MUNIT function

MUNIT

Returns a unit (identity) matrix of a given size.

Syntax:

MUNIT(size)

returns the unit matrix, also known as the identity matrix I, of size size (an integer greater than zero).

The identity matrix has ones on the leading diagonal, and zeroes elsewhere.

MUNIT returns an array, and must be entered as an array formula (for example by using Cntrl-Shift-Enter rather than just Enter).

Example:

=MUNIT(2)

when entered as an array formula in cell B3, returns {1;0|0;1}, so that B3, C3, B4, C4 show 1, 0, 0, 1 respectively.

See also:

MDETERM, MINVERSE, MMULT

How To Use Arrays

Array functions