Re: [R-sig-eco] Gravity (spatial interaction) models in R

Melanie Murphy wrote: Hi All, I am constructing "gravity" (spatial interaction) models in R for ecological application. I have linearized the unconstrained model and solved using OLS. However, I would like to do some further, more in-depth, analyses. 1) Is there an R package actually d

[R-sig-eco] beam forming

This is a geophysics trick for finding peaks in a signal that are seperated by distance- does anyone know of an R routine for preforming this? -- Let's not spend our time and resources thinking about things that are so little or so large that all they really do for us is puff us up and make us fe

Re: [R-sig-eco] R-sig-ecology Digest, Vol 2, Issue 4

Hi Melanie, It has been a long time since i looked at gravity models but if I remember correctly, they are formulated as log linear models with a particular weight matrix. I would guess that that could be written as a generalized linear mixed model, and fit with lme, or lmer, though if a paramet

Re: [R-sig-eco] Good Book for learning R

Venables and Ripley (2002) Modern Applied Stats with S, Springer and, in particular, Venables and Ripley (2000) S Programming, Springer, are two good resources for picking up tips, features of the language etc, especially the latter. Those looking at programming in R might also take a look at Brau

Re: [R-sig-eco] Good Book for learning R

I will second Dan's sentiment here: I haven't found a single source which comprehensively lays out the programming framework for R (though I've never seen The R Book). I ended up learning (and still am learning) how to program R in a relatively piecemeal manner. Some of the references which c

Re: [R-sig-eco] Good Book for learning R

For a relatively concise and painless introduction, I suggest reading Dalgaard's "Introductory statistics with R," then the introductory material in Venables and Ripley, "Modern Applied Statistics with S." Once you have a good grounding in the basics, you may find most help in topic-specific ma

Re: [R-sig-eco] Good Book for learning R

I strongly recommend Michael Crawley's "The R Book". A bit expensive, but absolutely worth it. It is nearly 900 pages and covers everything from data structures to character string manipulation to stats. There may be better books out there, but I haven't seen them. As an aside, Crawley has

Re: [R-sig-eco] Good Book for learning R

Jeri, There may be some newer options now, but when I was first learning R, I used Peter Dalgaard's, Introductory Statistics with R. Cheers, Jeff *** Dr. Jeffrey W. Hollister US EPA Atlantic Ecology Division 27 Tarzwell Drive Narragansett, RI 02882 (401) 782-9655

[R-sig-eco] Good Book for learning R

I have only used R a little bit, and I am looking for a good, comprehensive book on R, but one that is approachable for a novice like myself. Any suggestions? Thanks, Jeri -- Jeri Lynn Parrent Postdoctoral Fellow Department of Integrative Biology University of Guelph Guelph, Ontario