MATLAB Answers

Setting position of Annotation on an axes component

17 views (last 30 days)
Jason
Jason on 2 Apr 2020
Commented: Jason on 2 Apr 2020
Hello, I am trying to add an annotation (textbox) to a plot that is on an axes component (Im using GUIDE). I understand you cannot set as a container the axes component so thought I could just get the x,y, coordinates of the axes.
axes(handles.axes1);
p=get(handles.axes1,'Position')
dim = [p(1) p(2) .3 .3];
str = ['Max dist (+/-0.1mm) = ',num2str(mxdist11,'%.4f')];
ann=annotation('textbox',dim,'String',str,'FitBoxToText','on', 'BackgroundColor','#FEBEAD');
But its not showing in the correct location
Surely this should be in one of the corners?
My aim is to get it in the top right corner.
thanks for any help

  0 Comments

Sign in to comment.

Accepted Answer

Jakob B. Nielsen
Jakob B. Nielsen on 2 Apr 2020
Edited: Jakob B. Nielsen on 2 Apr 2020
Hi Jason,
When you get the position of an axes, the first and second index are the start location of your axes in the x and y dimensions, respectively. The third and fourth index is the width and height of the axes. Try typing this into just the command window, in turn:
ax=axes;
p=get(ax,'Position')
It will probably give you something like
p =
0.1300 0.1100 0.7750 0.8150
(this is for my screen). It means that the x axis starts 0,13 of the way in, from the very leftmost part of the figure, and it then proceeds a further 0,775 whereupon it stops.
So what you want is for the x location of your textbox to be your axes start point, p(1), plus your axes width, p(3), minus the width of your text box. How to get that width? Well you have your ann handle, so ann.Position gives you the width (and height) - again in the 3rd and 4th index.
On my screen resolution this gives a textbox in the top right.
(mind you I hardset axes limits and the string, since I obviously dont have the variables you do :)
ax=axes;
p=get(ax,'Position');
%
w=0.3518;
h=0.0643;
dim = [(p(1)+p(3)-w) (p(2)+p(4)-h) w h];
str = ['Max dist (+/-0.1mm) = 0.7203'];
xlim([-0.8 0.8]);
ylim([-3 5]);
ann=annotation('textbox',dim,'String',str);

  3 Comments

Jason
Jason on 2 Apr 2020
Hi, thanks for this, but its the y starting value though that appears wrong
Im using p(2) but its starting halfway down.
Jakob B. Nielsen
Jakob B. Nielsen on 2 Apr 2020
I tihnk that is due to your 'FitBoxToText','on' option, which will fit the textbox to the figure in a way that you dont control yourself.
Jason
Jason on 2 Apr 2020
OK thanks, its a shame it can''t add the annotation directly to the axes component!

Sign in to comment.

More Answers (0)

Products


Release

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!