You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: setval.m
    path of file: ./repos/spm/matlabbatch/@cfg_repeat
    
    the code of the file until where you have to start completion: function item = setval(item, val, dflag)

% function item = setval(item, val, dflag)
% Add, replicate or delete an entry in item.val. The semantics is based on
% the contents of the 2nd argument:

    
function item = setval(item, val, dflag)

% function item = setval(item, val, dflag)
% Add, replicate or delete an entry in item.val. The semantics is based on
% the contents of the 2nd argument:
% If val == {}, set item.val to {}.
% If val(1) > 0, set item.val{min(val(2), numel(item.val)+1)} to
% item.values{val(1)}. 
% If val(1) =< 0, replicate item.val{min(val(2), numel(item.val))} by
% append