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Topic: Fiinding standard deviation of a 3D point set
Replies: 3   Last Post: Oct 4, 2012 12:41 PM

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Anu

Posts: 64
Registered: 2/22/05
Re: Fiinding standard deviation of a 3D point set
Posted: Oct 3, 2012 11:08 PM
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TideMan <mulgor@gmail.com> wrote in message <663ae353-1482-4752-950f-74ce186064d9@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.



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