% data for Exercise Set 1.2 
   
ex = input('Exercise number (3,4,7-14,33,34)? ');

if ex==3
   M = [1 2 3 4;4 5 6 7;6 7 8 9]
elseif ex==4
   M = [1 3 5 7;3 5 7 9;5 7 9 1]   
elseif ex==7    
   M = [1 3 4 7;3 9 7 6]    
elseif ex==8    
   M = [1 4 0 7;2 7 0 10]     
elseif ex==9    
   M = [0 1 -6 5;1 -2 7 -6]   
elseif ex==10
   M = [1 -2 -1 3;3 -6 -2 2] 
elseif ex==11
   M = [3 -4 2 0;-9 12 -6 0;-6 8 -4 0] 
elseif ex==12
   M = [1 -7 0 6 5;0 0 1 -2 -3;-1 7 -4 2 7] 
elseif ex==13
   M = [1 -3 0 -1 0 -2;0 1 0 0 -4 1;0 0 0 1 9 4;0 0 0 0 0 0] 
elseif ex==14
   M = [1 2 -5 -6 0 -5;0 1 -6 -3 0 2;0 0 0 0 1 0;0 0 0 0 0 0] 
elseif ex==33
   M = [1 1 1 12;1 2 4 15;1 3 9 16] 
elseif ex==34
   t = [0; 2; 4; 6; 8; 10]; f = [0; 2.9; 14.8; 39.6; 74.3; 119];
   M = [ones(6,1) t t.*t t.^3 t.^4 t.^5 f]
   disp('To view the entries of M in rational form, enter')
   disp('        format rat, M')
   disp('  The command   format short   returns the display to short decimal format.')
else
   disp('No data for this exercise in Section 1.2.')  
end