Good morning,I hope this email finds you well.I am looking for a copy of the GEBCO Digital Atlas (GDA). General Bhatrimetric Chart of the Ocean. The GEBCO Digital Atlas (GDA) was a two-volume DVD and CDROM set that contained GEBCO's 30 arc-second interval global gridded bathymetric data set and GEBCO Centenary release collection of bathymetric contours. Is anyone has a copy of this or do you know where can I find it? I really needed a copy of it.Thanks for you help.Best Regards,Valeria
On Wed, 1 Apr 2020 at 11:02, <r-sig-ecology-requ...@r-project.org> wrote: > Send R-sig-ecology mailing list submissions to > r-sig-ecology@r-project.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://stat.ethz.ch/mailman/listinfo/r-sig-ecology > or, via email, send a message with subject or body 'help' to > r-sig-ecology-requ...@r-project.org > > You can reach the person managing the list at > r-sig-ecology-ow...@r-project.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of R-sig-ecology digest..." > > > Today's Topics: > > 1. Function in Genetic Algorithms (Daniel =?ISO-8859-1?Q?Pat=F3n?=) > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 31 Mar 2020 16:06:04 +0200 > From: Daniel =?ISO-8859-1?Q?Pat=F3n?= <d.pato...@gmail.com> > To: R-sig-ecology@r-project.org > Subject: [R-sig-eco] Function in Genetic Algorithms > Message-ID: <20200331160604.05f908850e44f7fc5c96c...@gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > > Dear colleagues: > > I'm trying to fit a model by Genetic Algorithms. In the GAFIT package the > expression I use for fitting is: > > fitness <- expression((Z - (X^a + Y^b))^2) > > Y a and b are coefficients of the variables X and Y. Z is the output > variable. > > When I try to use another package (rgenoud, GA, etc...) I must put the > syntax in function form. I use this: > > fitness <- function(X,Y,Z) { > Z <- trees$BIOMASS > X <- trees$DIAMETER > Y <- trees$HEIGHT > observed <- (X + X^2 + Y + Y^2 + X*Y) > expected <- Z > error <- (observed-expected)^2 > return(error) > } > > I don't know what I'm doing wrong. > > I'd appreciate a little help. > Thank you > > -- > > **************************************************************************** > Daniel Patón > Numerical Ecology. Ecology Unit > Department of Plant Biology, Ecology and Earth Sciences > Faculty of Sciences. University of Extremadura > Avda. Elvas s/n 06071 Badajoz (Spain) > https://orcid.org/0000-0003-2500-3964 > https://cvn.fecyt.es/0000-0003-2500-3964 > http://unex.academia.edu/DanielPatonDominguez > https://www.researchgate.net/profile/Daniel_Paton/ > http://sites.google.com/site/numericalecologyuex/home > http://twitter.com/NumericalEcolo1 > https://www.youtube.com/channel/UCcDUrzoZQ5OID6uVxhcwBng > > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > R-sig-ecology mailing list > R-sig-ecology@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-ecology > > > ------------------------------ > > End of R-sig-ecology Digest, Vol 145, Issue 1 > ********************************************* [[alternative HTML version deleted]] _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
