How can I set automatically the textarrow position on a graph?

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I would like to place the top of the arrow in a text-arrow annotation automatically on a plot, taking as reference a specific point of a line

Answers (2)

Oleg Komarov
Oleg Komarov on 20 Feb 2013
Edited: Oleg Komarov on 20 Feb 2013
It converts data units to normalized units which are required by the annotation() function.
plot(1:10);
% tail
[xt yt] = ds2nfu(3, 6);
% head
[xh yh] = ds2nfu(5, 5);
a = annotation('textarrow', [xt xh],[yt yh], 'String' , 'Straight Line');

Azzi Abdelmalek
Azzi Abdelmalek on 20 Feb 2013
Edited: Azzi Abdelmalek on 20 Feb 2013
annotation('textarrow',[x0,x1],[y0,y1],'String',yourtext);

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