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: admCanonFDMethodName.m
    path of file: ./repos/d2d/arFramework3/ThirdParty/StrucID/adimat/runtime
    
    the code of the file until where you have to start completion: % function z = admCanonFDMethodName(meth)
%
% Canonicalize the alias names for the three FD methods central,
% forward, and backward.
%
% see also admDiffFD, admOptions.
%
% This file is part of the ADiMat runtime environment.
%
% Copyright 2010,2011 Johannes Willkomm, Institute for Scientific Computing
%                     RWTH Aachen University
function z = admCanonFDMethodName(meth)
  z = '';
  switch met
    
function z = admCanonFDMethodName(meth)
%
% Canonicalize the alias names for the three FD methods central,
% forward, and backward.
%
% see also admDiffFD, admOptions.
%
% This file is part of the ADiMat runtime environment.
%
% Copyright 2010,2011 Johannes Willkomm, Institute for Scientific Computing
%                     RWTH Aachen University
function z = admCanonFDMethodName(meth)
  z = '';
  switch meth
   case {'c', 'central', 'centered', 'centralized'}
    z = 'central';
   case {'l', 'left', 'neg', 'negative', 'b', 'back', 'backward', 'backwards'}
    z = 'backward';
   case {'r', 'right', 'pos', 'positive', 'f', 'for', 'forward', 'forwards'}
    z = 'forward';
   otherwise
    error('adimat:admCanonFDMethodName:unknownFDMode', ...
          'FD method name "%s" is unknown', meth)
  end