text with arrow pointer
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i need help with
how to draw an arrow to point in a specific direction
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Cris LaPierre
am 25 Jul. 2023
5 Kommentare
Walter Roberson
am 25 Jul. 2023
Be careful, the positions for annotation() can only be absolute coordinates or coordinates normalized to the figure. There is no way to specify data units.
There are File Exchange contributions to make it easier to use data units
Cris LaPierre
am 25 Jul. 2023
Here's an example of one such program on the File Exchange
% add an annotation pointing to the 5th data point
x = 0:24;
y = randi(6000,size(x));
plot(x,y)
S = sprintf("A2="+y(5));
xa = [-1 0]+x(5);
ya = [-1000 0]+y(5);
[xaf,yaf] = ds2nfu(xa,ya);
annotation('textarrow', xaf, yaf,'String',S)
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