How to import text file in GUI and link it with another .m program

I just wrote a program on importing text file in GUI, and I am not sure whether it really reads the file

% --- Executes on button press in datum1.
function datum1_Callback(hObject, eventdata, handles)
% hObject    handle to datum1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
[filename1 pathname1]=uigetfile({'*.txt'},'File Selector');
datum1=strcat(pathname1, filename1);
set(handles.datum1txt,'String',datum1)


% --- Executes on button press in datum2.
function datum2_Callback(hObject, eventdata, handles)
% hObject    handle to datum2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
[filename2 pathname2]=uigetfile({'*.txt'},'File Selector');
datum2=strcat(pathname2, filename2);
set(handles.datum2txt,'String',datum2)

After that, I want to link this program to a file called geodesycode.m with a push of a button.

[Rik]

What makes you think it read the file? You are only storing the paths to a file in the String property of two objects.

What is the input of that function? The file names or the contents of those files?

[Lau Jit Sung]

so, how can I make the code to read the file?

Answer 1

[Mehmed Saad]

https://www.mathworks.com/help/matlab/ref/fscanf.html

you have the filename and pathname, build full file name from parts

full_filename1 = fullfile(pathname1,filename1);

Use fopen to open or obtain information about file

fileID = fopen(full_filename1);

select formatspec (currently i am setting it to string)

formatSpec = '%s'; %Read all characters excluding white spaces

Now scan file with your defined formatspec using fscanf

A = fscanf(fileID,formatSpec);

Now add this to you gui handle

set(handles.datum1txt,'String',A)

and donot forget to close the file at the end

fclose(fileID)

Edit: You can also use textscan instead of fscanf

[Lau Jit Sung]

thank you sir, it worked

[Lau Jit Sung]

Hi sir, sorry to bother again what if I wanna include the blank spaces

formatSpec = '%s'; %Read all characters excluding white spaces

is there anything I should do? Thank you

[Mehmed Saad]

Use textscan instead of facanf See textscan help You have to provide three inputs 1. File id 2. format spec ('%s') 3. Delimeter