How do I delete a field variable from a structure

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

[Jiro Doke]

I'm going to rename the title to better reflect the question.

Answer 1

[Jiro Doke]

handles.Data is a field of variable handles. To delete a field,

handles = rmfield(handles. 'Data');

To set the field to empty,

handles.Data = [];

[Martin]

Finally, it works as follows: handles=rmfield(handles,'Data');

Thx!

Answer 2

[Jan]

Same effect as rmfield, but about 10 times faster: FEX: fRMField

[Martin]

Ok I'll try, thx ;)

Answer 3

[Image Analyst]

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

[Martin]

great, it'll use

thx

[Trung Hieu Le]

Thanks for this answer. It is perfect.