How to generalize code with many cases (Matlab)

Dear members;

I have this Matlab code

for ess=1:n % 'n' is the number of cases (here n=4)

switch ess

case 1

Hc=H(1:T,:);

V=VV(1:20);

case 2

Hc=H(T:end,:);

V=VV(11:30);

case 3

Hc=H(T:end,:);

V=VV(21:40);

case 4

Hc=H(T:end,:);

V=VV(31:50);

end

end

Here I have just 4 cases. The first case stay as it is and the other cases will take 20 bits of VV each time. So if I have many cases more than 100 for example. How can I generalize this part of program in order to work with any number of cases.

Thank you.

Answer 1

[Jan]

for ess = 1:n
   if ess == 1
      Hc = H(1:T,:);
   else
      Hc = H(T:end,:);     
   end
   
   k = (ess - 1) * 10 + 1;
   V = VV(k:k + 19);

end

[Afluo Raoual]

Thank you for your help as usual Sir.

I appreciate it