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Getting value from a listbox. Error: Cell contents reference from a non-cell array object.

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Manuel
Manuel on 23 Aug 2013
Im trying to get the value selected in a listbox(Temp_listbox) by a callback botton and the listbox contains cells of integers:
string5 = get(handles.Temp_listbox, 'String');%%get cond1
value5 = get(handles.Temp_listbox, 'Value');
cond1 = string5{value5};
But I got the error: Cell contents reference from a non-cell array object.
Any idea about how could be solved? Thanks in advance.
Note: The value of cond1 is used afterwards to find the intersection in an array and plot the data.
  2 Comments
Manuel
Manuel on 23 Aug 2013
I think so, the error is :
Cell contents reference from a non-cell array object.
Error in GUI_v1>plot1_Callback (line 405)
cond1 = string5{value5};
And in the same callback function I have also similar code but for other listboxs and is working correctly :
string3 = get(handles.listchip_version, 'String');%%get chip version
value3 = get(handles.listchip_version, 'Value');
chip1 = string3{value3};
string4 = get(handles.listtest, 'String');%%get test version
value4 = get(handles.listtest, 'Value');
test1 = string4{value4};
The only different in the cond1 is the content of the listbox which one is a number and not a string value.

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Accepted Answer

Grzegorz Knor
Grzegorz Knor on 23 Aug 2013
I suppose that your listbox contains only one string. Compare two codes:
1:
lb = uicontrol('Style','listbox','Position',[10 10 100 100],'String','a');
a = get(lb,'String');
a{get(lb,'Value')}
2:
lb = uicontrol('Style','listbox','Position',[10 10 100 100],'String',{'a','b','c'});
a = get(lb,'String');
a{get(lb,'Value')}
Code 1 produces an error.
  3 Comments
Manuel
Manuel on 26 Aug 2013
Hello Walter, you are right when the string property is empty does not work, with
cellstr(get(TheHandle, 'String'))
works perfect.
Thank you very much!

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More Answers (1)

ES
ES on 23 Aug 2013
Not sure, you must be doing something wrong. It works fine,
if true
eg:
set(handles.listbox1, 'String',{1,2,3,4})% to set set of integers as entries for the list box.
and somewhee else,
string5 = get(handles.listbox1, 'String');%%get cond1 value5 = get(handles.listbox1, 'Value'); cond1 = string5{value5};
output is cond1=1 end
please check..
  1 Comment
Manuel
Manuel on 23 Aug 2013
I check and the error is still there :
Cell contents reference from a non-cell array object.
Error in GUI_v1>plot1_Callback (line 405)
cond1 = string5{value5};
And in the same callback function I have also similar code but for other listboxs and is working correctly :
string3 = get(handles.listchip_version, 'String');%%get chip version
value3 = get(handles.listchip_version, 'Value');
chip1 = string3{value3};
string4 = get(handles.listtest, 'String');%%get test version
value4 = get(handles.listtest, 'Value');
test1 = string4{value4};
The only different in the cond1 is the content of the listbox which one is a number and not a string value.

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