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Cannot change title of a saved figure." Unable to perform assignment because dot indexing is not supported for variables of this type."

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DFfd
DFfd 2022-2-11
评论： Voss 2022-2-11
I want to change the title of the figure I saved by running
title('Ortskurve von G_0(jw), Volleingriff, Vorschub in -X-Richtung, a_p variiert');
MATLAB returns the following error:
Unable to perform assignment because dot indexing is not supported for variables of this type.
Error in ctrluis.axesgroup/addbypass>localTitle (line 24)
this.Title = string;
Error in mwbypass (line 17)
hh = feval(fcn{:},varargin{:});
Error in title (line 75)
h = mwbypass(ax,'MWBYPASS_title',titlestr,pvpairs{:});
Upon error, the variable "this" has value 0+0i
I tried to change title in Property Inspector though I can't find any property named "Title" in gcf.

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Voss
Voss 2022-2-11
编辑：Voss 2022-2-11
Ran in:
I'm not sure what causes that error, but here's a workaround:
S = load('Hermle C800 G0 Vorschub -X.fig','-mat');
f = S.hgM_070000.GraphicsObjects.Format3Data;
ax = findall(f,'Type','axes','HandleVisibility','off');
set(get(ax,'Title'),'String','Ortskurve von G_0(jw), Volleingriff, Vorschub in -X-Richtung, a_p variiert');
figure(f);
  2 个评论
DFfd
DFfd 2022-2-11
Thanks for the solution.
Before saving the figure I added the vertical line at Re=1 by running
xline(1,'HandleVisibility','off');
I guess that's where HandleVisibility was set to off. I didn't know this would have such an adverse effect on title changing.
Voss
Voss 2022-2-11
I don't think the error was related to HandleVisibility, because I set it to 'on' manually and still had the same error using the title() function.
Anyway, glad the workaround seems to work!

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