Arrow between several points
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ABCDEFG HIJKLMN
el 14 de Feb. de 2022
Respondida: Matt J
el 14 de Feb. de 2022
I want to plot the evolution of a solution on a graph.
I have constructed a vector of x and y coordinates as rows, changing every column (at every iteration).
I would like to plot all the points but add arrows in the midpoint between each solution. Something like this:
Is this possible? Thanks in advance!
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Matt J
el 14 de Feb. de 2022
You can use the annotation() command.
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Matt J
el 14 de Feb. de 2022
Editada: Matt J
el 14 de Feb. de 2022
The annotation command will let you draw an arrow between any two specified points. You can use the attached file data2units to convert the data coordinates to the units required by the annotation command, e.g.,
h=plot(2:6,'o'); axis equal
[X,Y]=data2units(gca,h.XData,h.YData);
Xmid=X(1:end-1)/2 + X(2:end)/2;
Ymid=Y(1:end-1)/2 + Y(2:end)/2;
annotation('arrow', [X(1), Xmid(1)],[Y(1), Ymid(1)])
annotation('arrow', [Xmid(1), X(2)],[Ymid(1), Y(2)])
%etc...
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Matt J
el 14 de Feb. de 2022
It might be easier just to use quiver().
h=plot(2:6,'o'); axis equal
[X,Y]=deal(h.XData, h.YData);
q=(1:0.5:numel(X))';
X=interp1(X(:),q); Y=interp1(Y(:),q);
hold on
quiver(X(1:end-1),Y(1:end-1), diff(X), diff(Y),'off')
hold off
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