size(A)>> A=[1 2 3 ; 4 5 6 ; 7 8 1] ; (the ";" stops A from printing on the screen)>> size(A)ans =3 3
>> a=A(1,2)a =2>> size(a)ans =1 1
>> b=A(1,:)b =1 2 3>> size(b)ans =1 3
>> c=A(:,1)c =147>> size(c)ans =3 1
>> B=A' (transpose)B =1 4 72 5 83 6 1>> B=A^(-1); (inverse)>> I=A*B (* is matrix multiplication)I =1.0000 0 0.00000.0000 1.0000 0.00000.0000 -0.0000 1.0000
>> C=A.*BC =-1.7917 1.8333 -0.3750 6.3333 -4.1667 1.5000-0.8750 2.0000 -0.1250
A dot before any operation means it will be applied to each element individually.>> B=A.^(-1)B =1.0000 0.5000 0.33330.2500 0.2000 0.16670.1429 0.1250 1.0000
>> C=A.*BC =1 1 11 1 11 1 1
