Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


Anu
Posts:
64
Registered:
2/22/05


Re: Fiinding standard deviation of a 3D point set
Posted:
Oct 3, 2012 11:08 PM


TideMan <mulgor@gmail.com> wrote in message <663ae35314824752950f74ce186064d9@googlegroups.com>... > On Thursday, October 4, 2012 3:45:12 PM UTC+13, Anusha wrote: > > Hi, > > > > > > > > I have a mean point set, represented by 3D coordinates(x,y,z) in 3D matrix. There a another point set in 3D coordinates. How can I compute the standard deviation between the mean and another point set? I want to know how much the dispersion of the given point set from the mean point set. > > > > > > > > Thanks. > > Not sure I understand exactly what you're getting at, but how about: > std(S1(:)S2(:)); > where S1 and S2 are the 3D matrices.
But S1 and S2 have different number of size. Its like S1 is Mx3 and S2 is Nx3.



