% data for Exercise Set 6.5

ex = input('Exercise number (1-20)? ');

if ex==1
   A = [1 -2;1 3] 
elseif ex==2
   A = [5 -5;1 1] 
elseif ex==3
   A = [1 5;-2 3] 
elseif ex==4
   A = [5 -2;1 3] 
elseif ex==5
   A = [0 1;-8 4] 
elseif ex==6
   A = [4 3;-3 4] 
elseif ex==7
   A = [sqrt(3) -1;1 sqrt(3)] 
elseif ex==8
   A = [sqrt(3) 3;-3 sqrt(3)] 
elseif ex==9
   A = [-sqrt(3)/2 1/2;-1/2 -sqrt(3)/2] 
elseif ex==10
   A = [-5 -5;5 -5] 
elseif ex==11
   A = [0.1 0.1;-0.1 0.1] 
elseif ex==12
   A = [0 0.3;-0.3 0] 
elseif ex==13
   A = [1 -2;1 3] 
elseif ex==14
   A = [5 -5;1 1] 
elseif ex==15
   A = [1 5;-2 3] 
elseif ex==16
   A = [5 -2;1 3] 
elseif ex==17
   A = [1 -.8;4 -2.2] 
elseif ex==18
   A = [1 -1;.4 .6]  
elseif ex==19
   A = [1.52 -.7;.56 .4] 
elseif ex==20
   A = [-1.64 -2.4;1.92 2.2] 
else
   disp('No data for this exercise in Section 6.5.')
end
