How to change name ( add index ) of variable in Maltab?

Question

I have the following script:

a=[1,2,3]
for i=1:length(a)
  e=0;
  e1=0;
  e2=0;
..... 

end

In the script the main loop ( the first ) is for i=1:length(a). e,e1,e2 should being rewritten for each a(i) as:

% I count the error
a=1:  e=0;
      e1=0;
      e2=0;
a=2:  e=0;
      e1=0;
      e2=0;
a=3:  e=0;
      e1=0;
      e2=0;

Accorsing to my first script, Matlab rewrites e,e1,e2, but I neede,e1,e2 for each a(i).

Question: Is it possible to change name of variables for each a(i)?

% to change like this?
a=1:  e_a_1=0;
      e1_a_1=0;
      e2_a_1=0;
a=2:  e_a_2=0;
      e1_a_2=0;
      e2_a_2=0;
a=3:  e_a_2=0;
      e1_a_2=0;
      e2_a_2=0;