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: showPixelValues.m
    path of file: ./repos/Projects/TaskAssignmentProblem/ImageToHTML
    
    the code of the file until where you have to start completion: function showPixelValues(varargin)
%   showPixelValues Displays pixels and pixel values like impixelregion
%   showPixelValues displays the pixels of an image, together with a pixel
%   grid and pixel values, like impixelregion does.  Unlike impixelregion,
%   however, showPixelValues produces an ordinary figure that be captured
%   when an M-file script is published.
%
%   Syntaxes:
%       showPixelValues(I)
%       showPixelValues(BW)
%       showPixelValues(RGB)
%       showPixelValues(X,map)

    
function showPixelValues(varargin)
%   showPixelValues Displays pixels and pixel values like impixelregion
%   showPixelValues displays the pixels of an image, together with a pixel
%   grid and pixel values, like impixelregion does.  Unlike impixelregion,
%   however, showPixelValues produces an ordinary figure that be captured
%   when an M-file script is published.
%
%   Syntaxes:
%       showPixelValues(I)
%       showPixelValues(BW)
%       showPixelValues(RGB)
%       showPixelValues(X,map)
%       showPixelValues(...,center)
%
%   Variable names I, BW, RGB, and X,map represent grayscale, binary, RGB, 
%   and indexed images.
%
%   center is a two-element vector, [X Y], indicating where to center the
%   displayed pixel region.
%
%   Example
%   =======
%       rgb = imread('peppers.png');
%       showPixelValues(rgb, [355 80])

%   Steve Eddins
%   Copyright 2007-2014 The MathWorks, Inc.

error(nargchk(1,3,nargin))

A = varargin{1};
map = [];
center = [];

if (nargin > 1) 
    if numel(varargin{2}) == 3
        map = varargin{2};
    else
        center = varargin{2};
    end