[R-sig-Geo] A function to calculate speed between two points

[Dave Fifield]

Hi Lucy,

The R package adehabitat has classes and functions to deal with animal
tracking data. When you import your data into adehabitat (into an object of
class ltraj, using as.ltraj), the speed, turning angles, etc. for each point
are calculated automatically for you and stored in the resulting data frame.

Cheers,
Dave
--
Dave Fifield
dave at mun.ca
Cognitive and Behavioural Ecology Programme
Memorial University of Newfoundland
St. John's, NL
Canada


>   
> Message: 3
> Date: Wed, 10 Mar 2010 17:42:01 +0000
> From: Lucy Hawkes <l.hawkes at bangor.ac.uk>
> To: R-sig-Geo at stat.math.ethz.ch
> Subject: [R-sig-Geo] A function to calculate speed between two points
> Message-ID:
> 	<93fa48a61003100942i35c0fd7fjda484d95b6e63d0c at mail.gmail.com>
> Content-Type: text/plain
> 
> Hello,
> 
> I am a new spatial R user, and am analysing animal tracking data. I would
> like to calculate the speed the animal travelled between points (assuming
> linearity etc). However, even though I can find various functions for
> distance, turning angles and analyses, I can't find one for speed.
> 
> I'm sure I'm probably missing what's right in front of me, but can anyone
> suggest where to look next?
> 
> With best wishes
> 
> Lucy
> 
> -- 
> ____________________________
> Dr Lucy Hawkes
> Post Doctoral Research Officer
> Bangor University
> School of Biological Sciences
> Brambell Laboratories E30
> Deiniol Road, Bangor, LL57 2UW
> T: +44 (1248) 388 813
> E: l.hawkes at bangor.ac.uk