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: test_nanstat.m
    path of file: ./repos/fieldtrip/test
    
    the code of the file until where you have to start completion: function test_nanstat

% MEM 1gb
% WALLTIME 00:10:00
% DEPENDENCY nansum nanmean nanstd nanvar nanvar_base
% DATA no

% Test the conformance of FieldTrip's nansum, nanmean, nanvar and nanstd
% functions with MATLAB
    
function run to detect more serious errors
  else
    fprintf('Testing type %s for nanvar & nanstd\n', class(x));
    assertElementsAlmostEqual(nanvar(x), var(x));
    assertElementsAlmostEqual(nanstd(x), std(x));
  end
end

% test for inaccuracy caused by running estimates
signal = rand(1000, 1);

for offset = logspace(8, 12, 4)
  x = signal + offset;
  sig2_true = var(x);  % note that var also suffers from (serious) numerical imprecision.
  sig2 = nanvar(x);
  fprintf('Adding offset %.2g: var()=%.4f, nanvar()=%.4f.\n', offset, sig2_true, sig2);
  assert(isalmostequal(sig2_true, sig2, 'reltol', 1e-3));
end