Arrow between several points

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ABCDEFG HIJKLMN
ABCDEFG HIJKLMN 2022-2-14
回答： Matt J 2022-2-14
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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采纳的回答

Matt J
Matt J 2022-2-14
You can use the annotation() command.
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ABCDEFG HIJKLMN
ABCDEFG HIJKLMN 2022-2-14
I would like to know how to do this automatically, that's what I was asking.
Matt J
Matt J 2022-2-14
编辑：Matt J 2022-2-14
Ran in:
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
Matt J 2022-2-14
Ran in:
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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