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

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.

Answer 1

[Voss]

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);

[DFfd]

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]

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!