MATLAB: Read data from a text box and save as .m file

gui user input

i have designed a GUI with a textbox and i want to read the data (particularly text data) a user paste unto the textbox and store it as a .m file when ever a push button is clicked. I already have a function that requires the use of the text that will be saved as a .m file. can anyone help with suggestion or code that can do this? Thanks in advance.

Best Answer

Hi, you can try this in the callback of the button you use to save the text to the .m file.

textbox_data = get(handles.textbox_tag,'String');
fid = fopen('File.m', 'w');
fprintf(fid, '%s\n', datestr(now));
fprintf(fid, '''Comment:'' %s\n', textbox_data);
fclose(fid);

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MATLAB: MATLAB GUI error when filling textboxes with data from file

Try using cell indexing in these lines:

set(handles.hostbox, 'String', A(1))
set(handles.usernamebox, 'String', A(2))
set(handles.passwordbox, 'String', A(3))

That is, change to:

set(handles.hostbox, 'String', A{1})
set(handles.usernamebox, 'String', A{2})
set(handles.passwordbox, 'String', A{3})

My guess as to what's happening is: A is holding cell arrays of strings (even though it's just one string in each cell), so the String property of your edit boxes is holding a cell array, rather than a string (char array). So when you go to print the contents, fprintf is freaking out (cell array input rather than a string). Does that make sense?

MATLAB: Output a file text in a uicontrol of style ‘static text’

See textscan.

fid = fopen('filename.txt');
if fid < 0, error('Cannot open file'); end
C = textscan(fid, '%s', 'Delimiter', '\n');
fclose(fid);

Best Answer

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MATLAB: MATLAB GUI error when filling textboxes with data from file

MATLAB: Output a file text in a uicontrol of style ‘static text’

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