# eye

Identity matrix

### eye

• It returns 1.

### eye(n)

• n should be non-negative integer.
• It returns the n-by-n identity matrix.
• If n is not positive, the result would be an empty matrix.
• If n is not integer, n would be rounded towards zero.
• It does not accept ±nan, or ±inf as argument.

### eye([m n])

• m and n should be non-negative integers.
• It returns an m-by-n matrix.
• If m < n, the first m columns form an identity matrix, while the last n - m columns contain only zeros.
• If m > n, the first n rows form an identity matrix, while the last m - n rows contain only zeros.
• If m or n is not positive, the result would be empty matrix.
• If m or n is not integer, it would be rounded towards zero.
• It does not accept ±nan, or ±inf as argument.