3D space and coordinate reference systems

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

Answer 1

[Honglei Chen]

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

Answer 2

[Ocram]

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.

Answer 3

[Honglei Chen]

Then you can just use plot3

doc plot3

Answer 4

[George Abrahams]

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