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How do I solve the error: Undefined variable "handles" or class "handles.edit21"?

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Nitin Samuel
Nitin Samuel 2012-12-18
I have developed a GUI.When the pushbuttton is clicked, the calculation is done and the calculated number which is stored in the variable 'T' must be displayed in an edit box as the output. I have used
set(handles.edit21,'String',T);
in the pushbutton callback. However when i click the pushbutton, I get the following error:
Undefined variable "handles" or class "handles.edit21".
How can I rectify this?

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回答（3 个）

Muruganandham Subramanian
编辑：Muruganandham Subramanian 2012-12-18
Variable 'T' should be converted to string using num2str(T) first, before calling. Have you done this?
Jan
Jan 2012-12-18
Whne the variable handles is unknown, you have to define it. This is actually trivial, so I'm not sure what the problem exactly is. A guess:
handles = guidata(hObject);
  1 个评论
Nitin Samuel
Nitin Samuel 2012-12-18
Actually Im new to matlab so dont knw much...In the beginning you have :
handles = guihandles(fig);
guidata(fig, handles);
I tried adding in hObject with 'fig' & 'handles', it says
Undefined function or variable 'hObject'.
Where should I put it? Really appreciate your help..

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Ilham Hardy
Ilham Hardy 2012-12-18
Did you use any clear -command family in your GUIDE code?
Such as:
clear
clearvars
clear all

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