How to rotate the annotation text box?

I want to rotate my annotation text box so I used both of this codes:

annotation(gcf,'textbox',...
    [0.365880952380952 0.219841269841271 0.17102380952381 0.0444444444444446],...
    'String','Gulf',...
    'FitBoxToText','off','BackgroundColor','none','EdgeColor','none',...
    'FontSize',8, 'color','w','FontName', 'cambria math','FontWeight','bold','TextRotation',45);

And:

h = annotation(gcf,'textbox',...
    [0.365880952380952 0.219841269841271 0.17102380952381 0.0444444444444446],...
    'String','Gulf',...
    'FitBoxToText','off','BackgroundColor','none','EdgeColor','none',...
    'FontSize',8, 'color','w','FontName', 'cambria math','FontWeight','bold');
set(h,'Rotation',45)

But both of this not working and causing errors. Did you know what is the problem here?

I read both of this questions (1 & 2) but they are didn't work too.

Thanks

Answer 1

[Ameer Hamza]

You can use textarraw, with options to make the head and line invisible

a = annotation(gcf,'textarrow',...
    [0.365880952380952 0.365880952380952], [0.219841269841271 0.219841269841271],...
    'String','Gulf', 'HeadStyle', 'none', 'LineStyle', 'none',...
    'FontSize',8, 'color','k','FontName', ...
    'cambria math','FontWeight','bold', 'TextRotation',45);

[SUAN HU]

Excellent idea !

Answer 2

[dpb]

Yes, as both Answers you referred to note specifically you can't rotate an annotation textbox and to use text object or textarrow instead. Both solutions work here; you didn't show or explain what "didn't work, too" means, specifically.

I'd make a minor adjustment to the example of 1) above

plot(1:10)
hAx=gca;
posn=hAx.Position;
angle=atan2d(posn(3),posn(4));
hT=text(5,6,'textbox annotation', 'rotation', angle);

I don't have time at the moment to work out the exact correction to the figure/axes geometry to compute the displayed angle of the line on the axes--the axis height/width is about right but it doesn't account for the area outside of the actual box outlines...