Evaluating and saving in vector

The solution might be easy but i cant figure out, please take a look at this line of code

eval(['cPDC' num2str(j) num2str(k) '=pdc(j,k,:)']);

assuming j=1 and k=2 (arbitrary), so for time being I am saving something (vector or matrix) in variable cPDC12=.. how can I change this line to save in vector, something like cPDC12(:,i)=.., where i is loop variable. Any help or suggestion will be greatly appreciated.

Thanks