How to save the elapsed time to workspace when using GUI?

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W Joey 2015-7-26

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https://ww2.mathworks.cn/matlabcentral/answers/231221-how-to-save-the-elapsed-time-to-workspace-when-using-gui

评论： W Joey 2015-7-28

Hello everyone, I have created a callback function of a button in GUI, now i want to record the elapsed time from the point of i click the button to the point a certain condition is met and save it in a cell(T0)in workspace. I added 'tic' in the callback function and 'toc' after the condition is met.

   function pushbutton1_Callback(hObject, eventdata, handles)  
   tic;
   if...
   T0{t}=toc;
   ...
   end
   assignin('base','T0',T0)

The problem is that the whole process runs smoothly and no error occurred but there was no T0 in workspace. Anyone could help or give me some suggestions? Thanks in advance.

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Geoff Hayes 2015-7-26

在 MATLAB Online 中打开

W - put a break point at the line

assignin('base','T0',T0)

and re-run your code. When you press pushbutton1, the debugger will pause at this line. Look at T0 - has it been initialized (i.e. has the condition been met)? Then step over this line to see what happens. You may want to evaluate this line in the command window just to see what happens.

W Joey 2015-7-28

You are right. I try to assign T0 in command line and it shows Undefined function or variable 'T0'. Seems that there's something wrong with the 'if' condition.

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