How to rotate a quiver object in matlab

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Ricardo Ferreira
Ricardo Ferreira 2015-6-9
评论： Adam Danz 2020-4-16
I have a quiver object like this
q = quiver(x,y,u,v);
and then I use rotate to rotate it, but nothing happens
rotate(q,[0 0 1],180);
the command above works on a surf object, but not in a quiver one,why?
Thank you!
  1 个评论
Adam Danz
Adam Danz 2020-4-16
If you're rotating the vector about it's base so that (x,y) do not change but the direction of the vector changes, you can use quiverRotate() from the file exchange.
Example:
[Ur, Vr] = quiverRotate(U, V, 180, 'deg');
quiver(x, y, Ur, Vr)
% Or use the quiver handle
quiverRotate(q, 180, 'deg')

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采纳的回答

Mike Garrity
Mike Garrity 2015-6-9
The rotate command actually modifies the data of the graphics object, and it doesn't know how to modify all of the different types of graphics objects. The quiver one, in particular is a bit tricky because some of the data represents directions instead of positions.
A more robust way to do this is to use the hgtransform command . It would look something like this:
g = hgtransform;
quiver(x,y,u,v,'Parent',g)
set(g,'Matrix',makehgtform('zrotate',pi/4))

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