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    function varargout = modsig(varargin)
% MODSIG M-file for modsig.fig
%      MODSIG, by itself, creates a new MODSIG or raises the existing
%      singleton*.
%
%      H = MODSIG returns the handle to a new MODSIG or the handle to
%      the existing singleton*.
%
%      MODSIG('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in MODSIG.M with the given input arguments.
%
%      MODSIG('Property','Value',...) creates a new MODSIG or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before modsig_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to modsig_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 modsig

% Last Modified by GUIDE v2.5 23-Aug-2003 12:52:40

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @modsig_OpeningFcn, ...
                   'gui_OutputFcn',  @modsig_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin & isstr(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

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


% --- Executes just before modsig is made visible.
function modsig_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to modsig (see VARARGIN)

	% Choose default command line output for modsig
	handles.output = hObject;

	% Update handles structure
	guidata(hObject, handles);

	% UIWAIT makes modsig wait for user response (see UIRESUME)
	uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = modsig_OutputFcn(hObject, eventdata, handles)
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
freqenv = eval([ '[' get(handles.freqenv,'String') ']' ]);
ampenv = eval([ '[' get(handles.ampenv,'String') ']' ]);
varargout{1} = freqenv;
varargout{2} = ampenv;
close;

% --- Executes during object creation, after setting all properties.
function freqenv_CreateFcn(hObject, eventdata, handles)
if ispc
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end

function freqenv_Callback(hObject, eventdata, handles)


% --- Executes during object creation, after setting all properties.
function ampenv_CreateFcn(hObject, eventdata, handles)
if ispc
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end

function ampenv_Callback(hObject, eventdata, handles)


% --- Executes on button press in create.
function create_Callback(hObject, eventdata, handles)
	uiresume(handles.figure1);

% --- Executes on button press in plot.
function plot_Callback(hObject, eventdata, handles)
	freqenv = eval([ '[' get(handles.freqenv,'String') ']' ]);
	ampenv = eval([ '[' get(handles.ampenv,'String') ']' ]);
	freqs = freqenv(2:2:end);
	ftimes = freqenv(1:2:end);
	amps = ampenv(2:2:end);
	atimes = ampenv(1:2:end);
	figure;
	subplot(2,1,1);
	plot(ftimes,freqs);
	ylabel('Frequency (Hz)');
	xlabel('Time (normalized)');
	grid;
	xlim([0 1]);
	title('Frequency Envelope');
	subplot(2,1,2);
	plot(atimes,amps);
	ylabel('Amplitude');
	xlabel('Time (normalized)');
	title('Amplitude Envelope');
	grid;
	xlim([0 1]);