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: centroid.m
    path of file: ./repos/chromatography/@Chromatography
    
    the code of the file until where you have to start completion: % ------------------------------------------------------------------------
% Method      : Chromatography.centroi
    
function varargout = centroid(obj, varargin)

% Check input
[data, options] = parse(obj, varargin);

% Variables
samples = options.samples;

count.before = 0;
count.after = 0;
count.removed = 0;
timer = 0;

fprintf([...
    '\n[CENTROID]\n',...
    '\nCentroiding mass values for ', num2str(length(samples)), ' samples...\n\n']);

for i = 1:length(samples)
    tic;
    
    % Display progress
    fprintf(['[', num2str(i), '/', num2str(length(samples)), ']']);
    
    % Input values
    y = data(samples(i)).xic.values;
    mz = data(samples(i)).mz;
    n = length(mz);
    
    % Centroid data
    if length(mz) > 1
        [mz, y] = Centroid(mz, y);
    end