clear all
A=[1 2;3 4]     %define 2 by 2 matrix
B=[5 6;7 8]
C=A+B           %addition
D=A-B           %subtraction
Ctranspose=C'   %transpose switch the row and column
column=[1;2;3;4] %column vector
row=column'      %row vector is transpose of column vector
E=A*B            %matrix multiplication
F=[5;6]          
H=A\F            %this gives the solution of A*H=F
A*H              %verify if it equals F
sin(A)           %matrix function
I=A.*B           %this multiplys each entries of matrices
J=[1 2;3 4;5 6]
K=[7;8;10]
L=J\K            %equations more than variables, gives linear regression solution
J*L              %not equals to K, but close
A(1,1)           %returns the entry of matrix A at (1,1)