MATLAB Functions Help Desk

eye

Purpose

Identity matrix

Syntax

Description

Y = eye(n) returns the n-by-n identity matrix.

Y = eye(m,n) or eye([m n]) returns an m-by-n matrix with 1's on the diagonal and 0's elsewhere.

Y = eye(size(A)) returns an identity matrix the same size as A.

Limitations

The identity matrix is not defined for higher-dimensional arrays. The assignment y = eye([2,3,4]) results in an error.

See Also

ones        Create an array of all ones

rand        Uniformly distributed random numbers and arrays

randn       Normally distributed random numbers and arrays

zeros       Create an array of all zeros



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