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: ft_freqsimulation.m
    path of file: ./repos/malini/Codes/deconvolution - model/spm8/external/fieldtrip
    
    the code of the file until where you have to start completion: function [data] = ft_freqsimulation(cfg)

% FT_FREQSIMULATION makes simulated data in FieldTrip format. The data is
% built up from fifferent frequencies and can contain a signal in which the
% different frequencies interact (i.e. cross-frequency coherent). Different
% methods are possible to make data with special properties.
%
% Use as
%   [data] = ft_freqsimulation(cfg)
%
% 
    
function
ft_defaults
ft_preamble help
ft_preamble provenance
ft_preamble trackconfig
ft_preamble debug

% return immediately after distributed execution
if ~isempty(ft_getopt(cfg, 'distribute'))
  return
end

% set defaults
if ~isfield(cfg, 'method'),        cfg.method = 'phalow_amphigh';         end
if ~isfield(cfg, 'output'),        cfg.output = 'all';                    end
if ~isfield(cfg, 'time'),          cfg.time = [];                         end

if isempty(cfg.time)
  if ~isfield(cfg, 'fsample'),       cfg.fsample = 1200;                    end
  if ~isfield(cfg, 'trllen'),        cfg.trllen = 1;                        end
  if ~isfield(cfg, 'numtrl'),        cfg.numtrl = 1;                        end
else
  cfg.trllen = [];                                    % can be variable
  cfg.fsample = 1/mean(diff(cfg.time{1}));  % determine from time-axis
  cfg.numtrl = length(cfg.time);
end