Thread Subject: copying multiple cells (strings) inside a cell array

I have a cell array containing strings and want to do a simple copy of the strings in some cells into other cells. Can this be done with indexing or cellfun or a loop?

e.g.
% copy all the cells containing "z" into the cells one before the "z" cells.

a = {'a','b','z','b','a','z'};
  
copy_cells = find(strcmp('z',a)); % indices of cells to be copied
target_cells = copy_cells-1; % indices of cells to be pasted into

result should read

a = {'a','z','z','b','z','z'};

I am sure there is a simple way to achieve this result, but I can not seem to get to it.
Any help is greatly appreciated.

Mike

a(target_cells) = {'z'}

"Matt Fig" <spamanon@yahoo.com> wrote in message <gssufh$jid$1@fred.mathworks.com>...
> a(target_cells) = {'z'}

Thanks