append the cell vector with out exceeding the border

hello all; i am using cell vector which was the total elements 12 and i modified 7 of that 12 elements,so how i can replace remaining with suitable index or position by using this function. in the example k1 have 12 elements and also k2 have 7 elements(modified elements).

      emlist_len=length(k2)+1;
      for email_coun=emlist_len: length(k1)
        unmodified_emai(email_coun,1)=k1(email_coun);
      end  
      k2=vertcat(k2,unmodified_emai);

also i applied the and i got this result

'[e-mail]'
'[e-mail]'
'[e-mail]'
'[e-mail]'
'[e-mail]'
'[e-mail]'
'[e-mail]'
[]
[]
[]
[]
[]
[]
[]
'[e-mail]'
'[e-mail]'
'[e-mail]'
'[e-mail]'
'[e-mail]'

Answer 1

[Walter Roberson]

k2=vertcat(k2,unmodified_emai(emlist_len:end));

[Mohamuud hassan]

thank you walter this is the appropriate answer

[Walter Roberson]

You should be considering just using

k2 = vertcat(k2, k1(size(k2,1)+1:end));