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: t_zeros.m
    path of file: ./repos/d2d/arFramework3/ThirdParty/StrucID/adimat/tvector_directderivs
    
    the code of the file until where you have to start completion: % function t_z = t_zeros(aval)
%
% Create zero derivatives of input argument, with the number of
% derivative components given by option('ndd')
%
% see also option, createFullGradients
%
% Copyright 2010 Johannes Willkomm, Institute for Scientific Computing
%           RWTH Aachen University.
% This code is under development! Use at your own risk! Duplication
    
function t_z = t_zeros(aval)
%
% Create zero derivatives of input argument, with the number of
% derivative components given by option('ndd')
%
% see also option, createFullGradients
%
% Copyright 2010 Johannes Willkomm, Institute for Scientific Computing
%           RWTH Aachen University.
% This code is under development! Use at your own risk! Duplication,
% modification and distribution FORBIDDEN!

function d_z = t_zeros(aval)
  if iscell(aval)
    d_z = d_cell(aval);
  elseif isstruct(aval)
    d_z = d_struct(aval);
  elseif isempty(aval)
    d_z = [];
  %  elseif isfloat(aval)
  else
    ndd = option('ndd');
    nord = option('order');
    if isempty(ndd)
      error('adimat:vector_directderivs:d_zeros', ...
              '%s', 'd_zeros: the global variable ndd is empty')
    end