GUI Code with a written Code for axes and slider

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

% Last Modified by GUIDE v2.5 20-Feb-2019 13:38:50

% Begin initialization code - DO NOT EDIT
%generate some data and set the x window size
load ('100m.mat')
y = (val - 1024 )/200;
Fs = 360;
x = (0:length(y)-1)/Fs ;
xwindow_size=1;
xwindow_min=min(x);
xwindow_max=max(x);
%make the GUI
h=struct;
h.f=figure(1);
clf(h.f)%make sure the figure is empty, not needed if you use h.f=figure;
h.xwindow_size=xwindow_size;
h.xwindow_min=xwindow_min;
h.xwindow_max=xwindow_max;
h.ax=axes('Parent',h.f,...
    'Units','Normalized',...
    'Position',[0.1 0.3 0.8 0.6]);
h.slider=uicontrol('Parent',h.f,...
    'Style','slider',...
    'Value',h.xwindow_min+h.xwindow_size/2,...
    'min',h.xwindow_min+h.xwindow_size/2,...
    'max',h.xwindow_max-h.xwindow_size/2,...
    'Units','Normalized',...
    'Position',[0.1 0.1 0.8 0.1],...
    'Callback',@sliderCallback);
guidata(h.f,h)
%make the plot
plot(x,y,'Parent',h.ax)%create the plot itself
%set(h.ax,'YLim',[min(y) max(y)])%fix the y-axis to specific values
set(h.ax,'YLim',[floor(min(y)) ceil(max(y))])%fix the y-axis to specific values
sliderCallback(h.f)%initialize the x-axis
function sliderCallback(obj,evnt)
handles=guidata(obj);
a=get(handles.slider,'Value');
set(handles.ax,'XLim',[-0.5 0.5]*handles.xwindow_size+a)
end

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

% Last Modified by GUIDE v2.5 20-Feb-2019 13:38:50

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @Signal_OpeningFcn, ...
                   'gui_OutputFcn',  @Signal_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 Signal is made visible.
function Signal_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 Signal (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = Signal_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 Insert.
function Insert_Callback(hObject, eventdata, handles)

clc;
load ('100m.mat')
ECGsignal = (val - 1024 )/200;
Fs = 360;
t = (0:length(ECGsignal)-1)/Fs ;

plot (t,ECGsignal)
    
% --- Executes on button press in Clear.    
function Clear_Callback(hObject, eventdata, handles)

cla reset;

% --- Executes on button press in ZoomIn.
function ZoomIn_Callback(hObject, eventdata, handles)

zoom on


% --- Executes on button press in ZoomOff.
function ZoomOff_Callback(hObject, eventdata, handles)

zoom off

% --- Executes on button press in ResetZoom.
function ResetZoom_Callback(hObject, eventdata, handles)

zoom out


% --- Executes on button press in Pause.
function Pause_Callback(~, eventdata, handles)
% hObject    handle to Pause (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
if(strcmp(get(handles.Pause,'String'),'Pause'))
    set(handles.Pause,'String','Play');
    uiwait();
else
    set(handles.Pause,'String','Pause');
    uiresume();
end


gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @Signal_OpeningFcn, ...
                   'gui_OutputFcn',  @Signal_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 Signal is made visible.
function Signal_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 Signal (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = Signal_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 Insert.
function Insert_Callback(hObject, eventdata, handles)

clc;
load ('100m.mat')
ECGsignal = (val - 1024 )/200;
Fs = 360;
t = (0:length(ECGsignal)-1)/Fs ;

plot (t,ECGsignal)
    
% --- Executes on button press in Clear.    
function Clear_Callback(hObject, eventdata, handles)

cla reset;

% --- Executes on button press in ZoomIn.
function ZoomIn_Callback(hObject, eventdata, handles)

zoom on


% --- Executes on button press in ZoomOff.
function ZoomOff_Callback(hObject, eventdata, handles)

zoom off

% --- Executes on button press in ResetZoom.
function ResetZoom_Callback(hObject, eventdata, handles)

zoom out


% --- Executes on button press in Pause.
function Pause_Callback(~, eventdata, handles)
% hObject    handle to Pause (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
if(strcmp(get(handles.Pause,'String'),'Pause'))
    set(handles.Pause,'String','Play');
    uiwait();
else
    set(handles.Pause,'String','Pause');
    uiresume();
end

How can i fit that code to display an ECG signal and Move with a slider along x-axis ?