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Topic: nearestNeighbor
Replies: 4   Last Post: Jul 20, 2011 4:46 PM

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Michel Slivitzky

Posts: 69
Registered: 12/7/04
Re: nearestNeighbor
Posted: Jul 20, 2011 4:46 PM
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Thanks very much Steve,
Your last answer was exactly what I was looking for.


"Steven_Lord" <> wrote in message <j078mk$ju0$>...
> "Michel " <> wrote in message
> news:j072mf$1l7$

> > Thanks for the information
> > Yes , I am using DelaunayTri
> > If I look at the 3 index values returned from DT(SI,:) by pointLocation
> > - one of them is exactly the same as the index returned from
> > nearestNeighbor
> > - but how do I know which one is the nearest ?

> If pointLocation returns NaN, the point is outside the convex hull of your
> data. That answers your question:

> >> > Is there a way to figure if the query point is "in" the domain ?
> If you're looking for the nearest vertex for those points that are inside
> the convex hull, remove those points you located using pointLocation then
> use nearestNeighbor on the remaining points. Alternately just take the
> coordinates of the vertices that make up the triangle that pointLocation
> returned and compute the distance (using HYPOT, NORM, etc.) yourself then
> choose the MIN.
> If this is not what you're looking for, please explain in more depth exactly
> what you're trying to do.
> --
> Steve Lord
> To contact Technical Support use the Contact Us link on

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