How to save some values from gui into a text file and load them elsewhere as a number?

I have 2 values from an edit box and I want to write them in a txt file when I press a push button

function Masaedit_Callback(hObject, eventdata, handles)
% hObject    handle to Masaedit (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB

function Arias_Callback(hObject, eventdata, handles)
% hObject    handle to Arias (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

function pushbutton7_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA

   m=str2double(get(handles.Masaedit, 'string'));
    assignin('base','m',m)

    A=str2double(get(handles.Arias, 'string'));
    assignin('base','A',A)
    twovalues = fopen('twovalues.txt','w');
    fprintf(twovalues,'%6d\t%3d',m,A);
    fclose(twovalues);

But I want to save them as:

m=value;
A=value;

After the values are saved , I want to load the text file in a function like:

function xypr=twovalues (m,A)
CD=1;
load ('twovalues.txt',m,A)
ad=(-1/2)*((CD*A)/m);
end

But that it seems a little tricky and I don't know how should I do the conversion because for A,m = I need to load them as a string and for the result I should use something like str2double.

[Greg]

First - why do you want to use a file? Are you just new to GUIDE and sharing data/variables between objects and callbacks?

Second - why a text file instead of a .mat file?

Third - what do you mean by:

But I want to save them as:
m=value;
A=value;

[Stephen23]

"But I want to save them as:"

m=value;
A=value;

"After the values are saved , I want to load the text file in a function like:..."

Why is this required? Is the aim just to move data from one callback/function to another? Why use a non-standard text format? If so, there are much simpler ways to do that: you might want to read this:

https://www.mathworks.com/help/matlab/creating_guis/share-data-among-callbacks.html