How do I delete a field variable from a structure

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Martin
Martin 2012-2-19
评论： Trung Hieu Le 2016-6-6
I have variable in gui: handles.Data; Data is type: 70x50x2 logical. I need to delete the variable data. When i write: delete(handles.Data); or clean(handles.Data); then get an error: Argument must contain a string. :(
Thank you

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采纳的回答

Jiro Doke
Jiro Doke 2012-2-19
handles.Data is a field of variable handles. To delete a field,
handles = rmfield(handles. 'Data');
To set the field to empty,
handles.Data = [];

更多回答（2 个）

Jan
Jan 2012-2-19
Same effect as rmfield, but about 10 times faster: FEX: fRMField
Image Analyst
Image Analyst 2012-2-19
Try this robust code, to avoid errors:
% Try to remove the field called Data, if there is one.
% First see if there is a field called "Data."
hasField = isfield(handles, 'Data') % Will be True or False.
% Now remove it if it's there.
if hasField
% Field is there. Remove it.
handles = rmfield(handles, 'Data')
else
% Field is not there, warn user.
warningMessage = sprintf('Warning: the structure "handles"\ndoes not have a field called "Data."');
uiwait(warndlg(warningMessage));
end

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