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Highlights from
Eye diagram in GUI

from Eye diagram in GUI by Nikola
Plotting an eye diagram figure in GUI when a button is pressed

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

% Last Modified by GUIDE v2.5 01-Jul-2013 09:57:25

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @ButtonAxis_OpeningFcn, ...
                   'gui_OutputFcn',  @ButtonAxis_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(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 ButtonAxis is made visible.
function ButtonAxis_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 ButtonAxis (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = ButtonAxis_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
varargout{1} = handles.output;


% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Initialize system parameters
Fs = 10000; Rs = 100; nSamps = Fs/Rs; rollOff = 0.5; M=4;
hMod = comm.QPSKModulator; % comm.QPSKModulator System object

% Square root raised cosine filters
filtSpec = fdesign.pulseshaping(nSamps,'Square root raised cosine',...
    'Nsym,Beta',6,rollOff);
hTxFlt = design(filtSpec); hTxFlt.PersistentMemory = true;
hRxFlt = copy(hTxFlt); hTxFlt.Numerator = hTxFlt.Numerator*nSamps;

% Generate modulated and pulse shaped signal
frameLen = 1000;
msgData = randi([0 M-1],frameLen,1);
msgSymbols = step(hMod, msgData);
msgTx = hTxFlt.filter(upsample(msgSymbols, nSamps));

% t = 0:1/Fs:50/Rs-1/Fs; idx = round(t*Fs+1);
% hFig = figure; plot(t, real(msgTx(idx)));
% title('Modulated, filtered in-phase signal');
% xlabel('Time (sec)'); ylabel('Amplitude'); grid on;
% 
% % Manage the figures
% managescattereyefig(hFig);

% Create an eye diagram object
eyeObj = commscope.eyediagram(...
    'SamplingFrequency', Fs, ...
    'SamplesPerSymbol', nSamps);

% Update the eye diagram object with the transmitted signal
set(handles.axes1);
eyeObj.update(0.5*msgTx);

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