Arrow between several points
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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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Accepted Answer
Matt J
on 14 Feb 2022
You can use the annotation() command.
4 Comments
Matt J
on 14 Feb 2022
Edited: Matt J
on 14 Feb 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...
More Answers (1)
Matt J
on 14 Feb 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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