R-sig-ecology Digest, Vol 145, Issue 1
Isn't it this website? https://www.gebco.net/data_and_products/gridded_bathymetry_data/ On Sun, Apr 5, 2020 at 2:46 PM Valeria Valeria <
valeriaaaragao at googlemail.com> wrote:
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-request at r-project.org> wrote:
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https://stat.ethz.ch/mailman/listinfo/r-sig-ecology or, via email, send a message with subject or body 'help' to r-sig-ecology-request at r-project.org You can reach the person managing the list at r-sig-ecology-owner at 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.paton.d at gmail.com> To: R-sig-ecology at r-project.org Subject: [R-sig-eco] Function in Genetic Algorithms Message-ID: <20200331160604.05f908850e44f7fc5c96cc14 at 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 --
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Daniel Pat?n 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
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