How to add normal vectors/quivers to sphere in matlab?

[goonking]

so I got my sphere, centered at (1,-2,0) with radius 3

how do I put normal vectors/arrows onto my sphere's surface?
I tried quiver3(x,y,z)

 

[DrClaude]

There are good examples in the Matlab documentation: http://www.mathworks.com/help/matlab/ref/quiver3.html