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: chain.m
    path of file: ./repos/CanlabCore/CanlabCore/External/spider/basic/@chain
    
    the code of the file until where you have to start completion: 
function a = chain(in,hyper)
 
%==================================================================
% chain object
%==================================================================
% A=CHAIN(I,H) returns a chain object initialized with 
    
function a = chain(in,hyper)
 
%==================================================================
% chain object
%==================================================================
% A=CHAIN(I,H) returns a chain object initialized with 
%  a cell array of algorithms I and (hyper)parameters H.
%   
% This is used to create a chain of algorithms, the output of one
%  is fed into the input of the next.
%
% Examples: f=chain({fisher('output_rank=1;feat=5') knn});
%           [r,a]=train(cv({f knn}),toy);
%           get_mean(r)
%==================================================================
% Reference : 
% Author    : 
% Link      : 
%==================================================================
 
  if nargin == 0, in = {}; end