[R-sig-eco] R-sig-ecology Digest, Vol 145, Issue 1

[Torsten Hauffe]

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 using 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 using r-project.org> wrote:
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> >    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 using gmail.com>
> > To: R-sig-ecology using r-project.org
> > Subject: [R-sig-eco] Function in Genetic Algorithms
> > Message-ID: <20200331160604.05f908850e44f7fc5c96cc14 using 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
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> > ------------------------------
> >
> > End of R-sig-ecology Digest, Vol 145, Issue 1
> > *********************************************
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