[Matplotlib-users] Plotting vectors (arrows) on a manifold

[John H. <jdh...@ac...>]

Sam Smith is having trouble posting to the list, so I'm posting this
form him

From: "Samuel M. Smith" <sm...@sa...>
Date: 04 October, 2005 22:52:57 MDT
To: mat...@li...
Cc: "Samuel M. Smith" <sm...@sa...>
Subject: Plotting vectors (arrows) on a manifold


I need to plot vectors along a manifold (curve). The quiver plot
AFAI can tell only plots arrows on a grid not just
along a curve. In general I need a scatter plot where each plotted
point is a vector.  where (x,y) is the base of vector
and (u,v) is the vector. The plot could take in arrays  X Y U V
where as in the quiver plot X Y U V are matrices.

Anyone have any suggestions how I might go about generating such a
plot even if I have to do it by repurposing something else.
In general how would I position an arbitrary arrow somewhere on a
plot?

I suppose I could brute force it by superimposing 3 line plots for
each arrow where each plot draws one part of the arrow ( body, left
head, right head). This amounts to a lot of plots. Is there a
better way?

What would also be useful is a combination of a comet plot with an
arrow pointing in the direction the comet is moving.
This would be great for animation.


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