% data for Exercise Set 8.4

ex = input('Exercise number (1-13)? ');
 
if ex==1
   A = [1 0;0 -3] 
elseif ex==2
   A = [-5 0;0 0] 
elseif ex==3
   A = [sqrt(6) 1;0 sqrt(6)] 
elseif ex==4
   A = [sqrt(3) 2;0 sqrt(3)] 
elseif ex==5
   A = [-3 0;0 0] 
elseif ex==6
   A = [-2 0;0 -1] 
elseif ex==7
   A = [2 -1;2 2] 
elseif ex==8
   A = [2 3;0 2] 
elseif ex==9
   A = [7 1;0 0;5 5] 
elseif ex==10
   A = [4 -2;2 -1;0 0] 
elseif ex==11
   A = [-3 1;6 -2;6 -2] 
elseif ex==12
   A = [1 1;0 1;-1 1] 
elseif ex==13
   A = [3 2 2;2 3 -2] 
else
   disp('No data for this exercise in Section 8.4.')
end
