3D space and coordinate reference systems

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Ocram
Ocram 2012-3-23
回答： George Abrahams 2023-12-14
Hi, I would like to plot a graph with reference system on it. I mean, a triad of three axes. How can I plot a vector? I should get a line, using three numbers (direction cosines).
Any ideas would be very much appreciated.
Thanks, Marco

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回答（4 个）

Honglei Chen
Honglei Chen 2012-3-23
You can use quiver3, e.g.
quiver3(zeros(3,1),zeros(3,1),zeros(3,1),[1;0;0],[0;1;0],[0;0;1])
For details, see
doc quiver3
Ocram
Ocram 2012-3-23
Ok, this is fine for a reference system! But, if I want to plot an axis on the same plot that I get from quiver... How can I do? I mean an axis without the arrow at the end, just a simple line.
Honglei Chen
Honglei Chen 2012-3-23
Then you can just use plot3
doc plot3
George Abrahams
George Abrahams 2023-12-14
Hi Ocram. You can use my plotframe function on File Exchange, with the name-value argument ShowArrowHead='off', as in:
plotframe( ShowArrowHead='off' )
axis equal

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