getting x and y values and writing them

hi, i have created a user interface that gets sampling frequency and frequency from the user and plots it by the following code:

function pushbutton1_Callback(hObject, eventdata, handles)
sample = str2double(get(handles.edit1,'string'));
freq = str2double(get(handles.edit3,'string'));
if  freq ~= 1000 && freq ~= 2000 && freq ~= 1600 && freq ~= 4000 
    f = msgbox("Enter values within the frequency rules");
end
nCyl = 1;
t=0:(1/sample):(nCyl/freq);  
x=sin(2*pi*freq*t);
axes(handles.axes1);
plot(t,x);  

my next step is to get the x and t values from the graph and write them all in a text file or a message text, how can i get the values of x and y that are plotted in the graph?

Answer 1

[KSSV]

Already you have data in hand. If you want to write that into a file use:

data = [t(:) x(:)] ; 
writematrix(data,'data.txt') ;

If you want to extract data from figure and write:

a = get(gca,'Children');
xdata = get(a, 'XData');
ydata = get(a, 'YData');
data = [xdata(:) ydata(:)] ;
writematrix(data,'data.txt') ;

[Mohamed Turkmani]

Error in generator>pushbutton1_Callback (line 141)

writematrix(a,'data.txt') ;

[KSSV]

Edited the code.

[Mohamed Turkmani]

thanks <3