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Re: Interparticle distance

Posted by Dan Batzel on Mar 15, 2007; 12:01pm
URL: http://imagej.273.s1.nabble.com/Interparticle-distance-tp3700069p3700072.html

Thanks to all for the neat ideas as they were most helpful to me (now to
the fun task of evaluating them).

I am thinking that my particle disorder determination is a center of
mass problem.  

In one respect, it's like measuring the difference between the U.S.
center of population (the particles would be like cities) from its
geographic center (center of the image).  If the particles were
perfectly distributed with equal size, then these two centers would be
the same.
 
Thanks again.

Dan

-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of
Dan Batzel
Sent: Tuesday, March 13, 2007 1:24 PM
To: [hidden email]
Subject: Re: Interparticle distance

Thanks for helping me to better frame my question.

I am looking to somehow establish the "disorder" of the particles in the
image.

Their deviation from a grid might be an interesting way to quantify this
disorder.  

-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of
Johannes Schindelin
Sent: Tuesday, March 13, 2007 12:47 PM
To: [hidden email]
Subject: Re: Interparticle distance

Hi,

On Tue, 13 Mar 2007, Dan Batzel wrote:

> Great program.  I am a newbie with a bunch of particles and need to
> calculate the average distance between them.  There must be a way.

First you must decide what you want _exactly_. Do you want the average
distance between _neighbouring_ particles? Or do you want to get the
next
neighbour for each particle, and average _that_ distance? Or do you want

to have a measure how much the particle layout deviates from a hexagonal

layout?

Ciao,
Dscho