drawing simple 3d vectors without manual inputing values
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I have tried to find the answer to this but have not found explicitly what I'm looking for
All i want to do is define 2 vectors
a = [6,-8,2]
b = [4,6,12]
I want to plot in 3d
a+b
a-b
dot(a,b)
cross (a,b)
I have seen how to do it in mupad and i know you can use quiver3 but you have to manual input the points such as
"quiver3(x,y,x,u,v,w)" I want to be able to say quiver3("the name of the vector) and be done
How do i do this? Maylab is extremely powerful yet in all my searching i can not find the ability to simply plot 3 lousy R3 vectors
If someone could explain a simple way of what i want to do that would be great Thank you!
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Star Strider
le 1 Sep 2014
I have to admit I’m embarrassed by this construction, but if you absolutely must avoid using quiver3 with its usual argument list and want to use vectors, this will work:
a = [6,-8,2];
b = [4,6,12];
qv = @(a,b) eval(sprintf('quiver3(%f,%f,%f,%f,%f,%f)', [a;b]'));
figure(1)
qv(a,b)
grid on
4 commentaires
Star Strider
le 1 Sep 2014
It’s actually not complicated, but the eval step will slow it a bit.
To plot several quiver arrows in quiver3, you have to create the vectors you want to plot as matrices of quiver origins and directions. That’s best explained in Projectile Path Over Time.
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