Arrow between several points

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!

Answer 1

[Matt J]

You can use the annotation() command.

[ABCDEFG HIJKLMN]

Thank you for your answer. Could you please explain to me how this command works?

[Matt J]

Explain beyond what you see in the documentaiton?

https://www.mathworks.com/help/matlab/ref/annotation.html#busn_b9-4

If so, what specifically?

[ABCDEFG HIJKLMN]

I would like to know how to do this automatically, that's what I was asking.

[Matt J]

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...

Answer 2

[Matt J]

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