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How to deal with the string in GUI for multiple .m files ?

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Hello, I'd like to display the 'i' circulating in 'for' loop.
The main structure is like this :
After click the run button on GUI(in Main_GUI), 'STEP1.m' and 'STEP2.m' are implemented.
(I used the 'evalin' function to execute the .m file, for example, evalin('base', 'STEP1_COPY_LE_RESULT_mod'); )
'STEP1.m' is to make the excels, and 'STEP2' is to do simulation. 'STEP2.m' has for loop.
% 'STEP2.m' file
for i = 1 : case_num
Input_num = i;
sim(slx, Input_num)
% I'd like to display the 'i' number in GUI.
% set(handles.gui_string, 'String', num2str(i));
but I don't know how can I do this. I used guidata, getappdata, setappdata, and so on...
Please help me. I need your help. Thanks in advance.

Accepted Answer

Walter Roberson
Walter Roberson on 27 Nov 2017
set(handles.gui_string, 'String', num2str(i));

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