# nan

Array of not-a-numbers

### nan

• It returns not-a-number.

### nan(n)

• n should be non-negative integer.
• It returns an n-by-n matrix containing all not-a-numbers.
• If n is not positive, it returns an empty matrix.
• If n is not integer, n would be rounded towards zero.
• It does not accept ±nan, or ±inf as its input argument.

### nan(s1,s2,...,sn)

• s1, s2, ..., sn should be non-negative integers.
• It returns an array of size [s1 s2 ... sn] that contains all not-a-numbers.
• If any of s1, s2, ..., sn is not positive, it returns an empty matrix.
• Non-integer s1, s2, ..., sn would be rounded towards zero.

### nan(sizeVec)

• It returns an array of size specified by the vector sizeVec. The array contains all not-a-numbers.
• If any element of sizeVec is not positive, it returns an empty matrix. Non-integer elements of sizeVec would be rounded towards zero.