Implementing the Feval function in matlab

Question: I am having a hard time with implementing the feval function in matlab, it's one of the only aspects holding me up

function varargout = noise(varargin)
% NOISE M-file for Noise.fig
%      NOISE, by itself, creates a new NOISE or raises the existing
%      singleton*.
%
%      H = NOISE returns the handle to a new NOISE or the handle to
%      the existing singleton*.
%
%      NOISE('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in NOISE.M with the given input arguments.
%
%      NOISE('Property','Value',...) creates `a new NOISE or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before noise_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to noise_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help noise

% Last Modified by GUIDE v2.5 27-Oct-2003 22:16:23

% Begin initialization code - DO NOT EDIT
gui_Singleton = 0;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @noise_OpeningFcn, ...
                   'gui_OutputFcn',  @noise_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   @Frequency_Callback, ...
                   'gui_Octave',     @Octave_Callback, ...
                   'gui_Octave3',    @Octave3_Callback,... 
                   'gui_peak',       @PeakLevel_Callback, ...
                   'gui_lgcallback', @Leq_Callback, ...
                   'gui_duracback',  @BDuration_Callback, ...
                   'gui_kcallback',  @Kurtosis_Callback, ...
                   'gui_tspaceback', @TSpacing_Callback, ...
                   'gui_closefunct', @figure1_CloseRequestFcn, ...
                   'gui_impulcallk', @ImpulseNum_Callback,...
                   'gui_LeqA8_Call', @LeqA8_Callback, ...
                   'gui_militarystd', @MILSTD_Callback, ...
                   'gui_AHUs_Callba', @AHUs_Callback, ...
                   'gui_PkRangecall', @PeakRange_Callback, ...
                   'gui_saveCallba', @save_Callback, ...
                   'gui_hFigure', @hfigure, ...
                   'gui_Handles', @tophandles);

if (nargin && ischar(varargin{1}))
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    %[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
    [varargout{1:nargout}] = feval(gui_State.gui_OutputFcn, gui_State.gui_hFigure, [], gui_State.gui_Handles);
else
    feval(gui_State.gui_OutputFcn, gui_State.gui_hFigure, [], gui_State.gui_Handles, varargin{:}); % Error here? 
    %gui_mainfcn(gui)State, varargin{:}); gui_State.gui_OutputFcn, gui_hFigure, [], gui_Handles
end

% if nargout
       % [varargout{1:nargout}] = feval(varargin{:});
    %else       
     %   feval(varargin{:});
    %end
% End initialization code - DO NOT EDIT

The errors below:

Error using noise>noise_OutputFcn
Too many input arguments.

Error in noise (line 60)
    feval(gui_State.gui_OutputFcn, gui_State.gui_hFigure, [], gui_State.gui_Handles,
    varargin{:}); % Error here?