Andrew Diamond

Apparently, when consecutive x,y points are the same dl will be [0,0,1] and so you end up with alpha and cross(Nz,dl) being 0 yielding a rotation matrix R that is just NaNs and nothing will be plotted for that segment.

There may be more elegant fixes but checking for that and using R=eye(3) if it is nan seems to solve this.

if(isnan(R(1)))
R=eye(3);
end

Thanks for this! Not being able to assign arrow color by vector magnitude was driving me crazy. I do have to add view([0,-90]); after calling this since it transposes my graphs in a strange way, however.

Hello, thanks a lot for this file. I have two questions :
- I wondering if this fonction plot -U and -V instead of U et V ? An other way to say that, i wondering if the the arrow points in the opposite side
- I realy need a function with normalize arrow.