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Topic: Euclidean distance of all pairwise combinations (redundants)
Replies: 7   Last Post: Nov 18, 2012 4:02 AM

 Messages: [ Previous | Next ]
 Jesse Pisel Posts: 3 Registered: 11/14/12
Re: Euclidean distance of all pairwise combinations (redundants)
Posted: Nov 15, 2012 4:04 AM

Thank you for all the suggestions everyone, all the different codes worked
well and they all did exactly what I wanted to do with my data set. Thank
you for all the help! I ended up just using Tuples instead of Subset just
for ease of use as Ralph suggested.

On Wed, Nov 14, 2012 at 5:23 AM, Sseziwa Mukasa <mukasa@gmail.com> wrote:

> Outer[EuclideanDistance[#,#]&,list,list]
>
> On Nov 14, 2012, at 1:29 AM, Jesse Pisel <jessepisel@gmail.com> wrote:
>

> > I have been having a tough time trying to figure out how to include all
> red undant pairwise combinations in my results for the euclidean distance
> between a set of points. I have a set of points with xy coordinates and
> want the euclidean distance between each point including the point and
> itself. So if my points in xy space are list = {{1, 1}, {2, 2}, {3, 3}} for
> example, I want the distance from {1, 1} to {1, 1}, {1, 1} to {2, 2}, and
> {2, 2} to {3, 3} etc. for each point for a total of 9 distances all
> together. The EuclideanDistance function removes the redundant distances
> that I want retained in the results. I have been using this code just to
> play with data but would like to be able to expand up to 500+ points:

> >
> > list = {{1, 1}, {2, 2}, {3, 3}}
> > EuclideanDistance @@@ Subsets[list, {2}]
> >
> > Any ideas on how to get the euclidean distance between all the points

> including redundants and self references?
> >
> >

>

--
*Jesse Pisel*
970-901-5455
P.O. Box 18471
Golden, CO 80401

Date Subject Author
11/15/12 Ralph Dratman
11/15/12 Sseziwa Mukasa
11/15/12 Jesse Pisel
11/15/12 Bob Hanlon
11/15/12 Bob Hanlon
11/17/12 Dana DeLouis
11/18/12 Joseph Gwinn