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gives

ans =
17 19 23
37 41 47

8.1.1.2 Retrieving Special Matrices from the MATLAB Library
MATLAB has some commonly used specialized matrices in its library that
can be called as needed. For example:

• The matrix of size (m ⊗ n) with all elements being zero is
M=zeros(m,n);

For example:

M=zeros(3,4)

gives

M =
0000
0000
0000

• The matrix of size (m ⊗ n) with all elements equal to 1 is
N=ones(m,n):

For example:

N=ones(4,3)

produces

N =
111
111
111
111

• The matrix of size (n ⊗ n) with only the diagonal elements equal
to one, otherwise zero, is P=eye(n,n):

For example:

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