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: toyreg.m
    path of file: ./repos/CanlabCore/CanlabCore/External/spider/basic/@toyreg
    
    the code of the file until where you have to start completion: function a = toyreg(hyper) 

%====================================================================
% TOY data for Regression problems
%==================================================================== 
% A=toyreg(H) returns a toy regression object initialized with hyperparameters H. 

    
function a = toyreg(hyper) 

%====================================================================
% TOY data for Regression problems
%==================================================================== 
% A=toyreg(H) returns a toy regression object initialized with hyperparameters H. 
%
% This object can generate toy data for regression with
% N input dimensions and O output dimensions. 
% If "nonlinearity" is specified it uses a map object to calculate the
% outputs.
% 
% Hyperparameters, and their defaults
%  l=100          -- examples
%  noiselevel     -- 0
%  n=1            -- input dimension
%  o=1            -- output dimension (possibly overriden by outpmap)
%  nonlinear=0    -- if 1 uses "outpmap" to calculate Y=map(X)
%  outpmap=map;
% 
%  seed=-1       -- random seed used to generate it, if -1 do not
%                   set seed
% 
%
% Methods:
%  generate,train,test

  a.l=100;
  a.noiselevel = 0;
  a.input_noiselevel = 0;
  a.n=1;
  a.o=[];
  a.nonlinear=0;
  a.W=[];
  a.outpmap=map;

  a.seed=-1;
  
  
  p=algorithm('toyreg');
  a= class(a,'toyreg',p);

  if nargin==1
    eval_hyper;
  end