For my GUI, how can I have one button open the file then the other buttons modify that file?

How would I link the file I open to the other buttons?

Answer 1

[Walter Roberson]

handles.file_identifier = fopen('TheDestinationFile', 'w');
guidata(handles);

and then in the other routines, for example:

fprintf(handles.file_identifier, '%s\n', 'hello there we have been waiting for you');

[shannon stoffel]

Thanks. But this didn't work for me. I open my file in a different way so I am not sure if that is the issue.

[Walter Roberson]

Tell us about how you open the file.

[shannon stoffel]

[filename1,filepath1]=uigetfile({'*.*','All Files'},... 'Select Data File 1'); cd(filepath1); rawdata1=dlmread(filename1);

M = csvread(filename1,1,1)

I am not really sure to how to put your code into this. Sorry, I have no prior experience in coding.