how to run mfile from GUI

Question

Lukas 2014-5-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/128486-how-to-run-mfile-from-gui

评论： nl2605 2014-5-6

hello i want to make GUI with 2 buttons. 1. button is for browse video file (it also connect path and file name into variable). this is my code in first button...

   function pushbutton1_Callback(hObject, eventdata, handles)
[videoName,videoPathName]=uigetfile({'*.mp4';'*.*'},'File Selector')
assignin ('base','file',videoName);
assignin ('base','path',videoPathName);
fname = strcat(videoPathName,videoName);
assignin ('base','fname',fname);

so path and file name are in workspace in variable 'fname'

by second button a i want to run mfile 'run' that need path and file name from 1. button. so i wroute there only:

function pushbutton2_Callback(hObject, eventdata, handles)      
       run

in mfile run is code:

...
  workingDir = 'C:\Users\lukino\Documents\MATLAB\temp';
  mkdir(workingDir);
  mkdir(workingDir,'images');
  disp('urobil temp dir')
  shuttleVideo = VideoReader(fname);
  disp('nacital mp4')...

dirrectories are made but video can not open... it wrote error:

Undefined function or variable 'fname'

but if i want to run it from mfile idetor it works... what is wrong?

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Answer 1

nl2605 2014-5-6

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/128486-how-to-run-mfile-from-gui#answer_135807

I think the problem is that 'fname' is not getting transferred from one callback function to another. The solution is using setappdata and getappdata. I hope I am getting your problem right.

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Lukas 2014-5-6

thank you it works good. but now i do not see other variables that are used in other functions (for example in function run)...so i can not access to him. how can i change it?

nl2605 2014-5-6

Variables used in a function are localized, I mean to say different functions don't share a common workspace. The variables will be deleted as soon as the function ends. If you want to use variables from one function to another again setappdata and getappdata will work.

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