search for: ecologist

A colleague has just passed me this interesting address: http://cc.oulu.fi/~jarioksa/softhelp/vegan.html "Vegan: R functions for vegetation ecologists" "Vegan package is intended to help vegetation ecologists and other community ecologists to use R. It is not a completely self-contained package, but it complements other R functions. .../... At this first stage, vegan implements some of the functionality of Peter Michin's DECODA...

...quot;normal" statistics). I looked through the packages, but the enormous amount of packages makes it very difficult for me to decide which one is worth mentioning. I used only a small part of all R packages (mainly recommended packages and grasper) and would like to know which package for ecologist has to be mentioned. I would greatly appreciate if you can tell me which packages you think are very useful for ecolgical research in R e.g. vegan, ade4, ... thanks in advance, regards Martin

Marine Spatial Modeler/Quantitative Ecologist position Full-Time/Exempt (Salaried) contract position with CSS-Dynamac (40 hrs per week) Job ID: 2016-1790 Location: Silver Spring, MD, USA; National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science (NCCOS) Posted Date: 11/29/2016 Category: Science/Enginee...

...Studies and Research The University of Rhode Island -----Original Message----- From: Milton Cezar Ribeiro [mailto:milton_ruser at yahoo.com.br] Sent: Wednesday, December 06, 2006 8:26 AM To: David Farrar; Xu Yuan; r-help at stat.math.ethz.ch Subject: Re: [R] test of spatial dependence?? - ask an ecologist? I never used it, but I beleave that it is a job for "mantel.rtest()" available on "ade4" package. In fact Farrar are right, you will neet the XY coordinates. Give a look at "Legendre & Legendre" text book. HTH, Miltinho Brazil David Farrar &l...

The NOAA National Centers for Coastal Ocean Science is hiring a Computational Ecologist, a statistical/computational ecologist with experience fitting advanced spatial models to marine wildlife survey data (e.g., seabirds and marine mammal transects, fisheries trawl surveys) in R and other statistical languages. This is a full-time, long-term stable contract position. We are looki...

...ooked through the packages, but the enormous amount of packages makes it > very difficult for me to decide which one is worth mentioning. > > I used only a small part of all R packages (mainly recommended packages and > grasper) and would like to know which package for ecologist has to be > mentioned. > > I would greatly appreciate if you can tell me which packages you think are > very useful for ecolgical research in R e.g. vegan, ade4, ... > > thanks in advance, regards Martin > > __________________________________...

...data were sampled every other month (i.e., February, April, June, August, October, December), every time I try to plot them (on the x-axis) they are plotted in alphabetical order. What am I missing? Cheers Kurt *************************************************************** Kurt Lewis Helf, Ph.D. Ecologist EEO Counselor National Park Service Cumberland Piedmont Network P.O. Box 8 Mammoth Cave, KY 42259 Ph: 270-758-2163 Lab: 270-758-2151 Fax: 270-758-2609 **************************************************************** Science, in constantly seeking real explanations, reveals the true majesty of our w...

R-ecologists: Anyone wanting to create a Krebs package for R can do so using the C-source code avalaible at: ftp://gause.biology.ualberta.ca/pub/jbrzusto/krebs/source.zip Barry J. Cooke Current mailing address: Ph.D. Candidate 3971 NW 23 Circle Environmental Biology...

...ch plot. I would like to randomly choose one individual from each plot that is present in the data set. I will have to do this to multiple data sets which may contain different plots, and may contain up to 1200 plots, so I can't choose the plots by hand. Please help me with this. I'm an ecologist and I'm in Panama, with no one around who is educated in R. Whoever solves this problem for me will be acknowledged in any resulting publications. Thanks! -Claire -- View this message in context: http://www.nabble.com/sampling-problem---new-to-R-tf3872130.html#a10970708 Sent from the R help...

...t sure how I would then translate those quantile values into another apply function to get the mean, since they differ from row to row. I also tried: apply(matrix,1,mean,na.rm=T,trim=.05)) and the trim argument was simply ignored Stumped. Any help appreciated. Thanks. Jim Bouldin, PhD Research Ecologist Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740

...e able to consecutively number, in new columns, the non-NA values within each column (i.e. A[1,1] A[3,2] and A[3,3] would all be set to one, and subsequent values in those columns would increase by one, until the last non-NA value is reached, if any). Any ideas? Thanks Jim Bouldin, PhD Research Ecologist Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740

Here's a question for ecologists on the r-help list-- I'm addressing this to ecologists in particular because they're most likely to be familiar with the equation in question but I'll be happy to discuss the problem with anyone who's willing to take a whack at it. I'm trying to write a function to calculate t...

Is there an R function that does canonical correspondence analysis. Can it be done using the VR function corresp()? If not, how hard it be to write R code to do it? I am a population biologist with long but patchy programming experience in C, Smalltalk, Java and other languages. Thanks, Patrick Foley patfoley at csus.edu

...to some established ecological theory (each x is the species richness of a community of primary producers, y is the productivity of each community; productivity and its predictability both increase with increasing species richness). Apologies for the probably clumsy decription of my problem - I am ecologist, not statistician (but a big fan of R). Cheers, Robert Robert Ptacnik Norwegian Institute for Water Research (NIVA) Gaustadall?en 21 NO-0349 Oslo FON +47 982 277 81 FAX +47 221 852 00

...with the study area polygons (six total) into R and use it to create the window for the spatstat analysis. I do not simply want to use a rectangle because the study areas spread out over 40000 ha. Any suggestions would be greatly appreciated. Thanks, Charlotte Reemts Charlotte Reemts Vegetation Ecologist The Nature Conservancy--Fort Hood (TX) Project P.O. Box 5190 Fort Hood, TX 76544-0190 254-286-6745 fax: 254-288-5039 CReemts@tnc.org [[alternative HTML version deleted]]

...xt, pch="1234", col= as.character(codes(cv.wshed.grp))) But this only plots the codes in cv.wshed.grp as they are encountered, not the levels. Ideally I'd like the legend to have the Group ID label, and a filled box corresponding to the colors in the text call above. -- Rob Schick Ecologist NOAA Fisheries Santa Cruz Lab 110 Shaffer Road Santa Cruz, CA 95060 Phone: 831.420.3960

...uot;model2"); I want to assign formulas, such as lm(y~x[,1]) and lm(y~x[,2]), to the variables "model1" and "model2". There are of course, many more than 2 models involved, so brute force is the option of absolute last resort. Thanks for any help. -- Jim Bouldin, Research Ecologist [[alternative HTML version deleted]]

...Similarly some of the numbered points overlap. I was wondering if there was a way to edit the biplot to move the label names and if not what the best alternative is. Thanks Anna pca<-biodata[,3:10] model<-prcomp(pca,scale=TRUE) summary(model) biplot(model) -- Dr Anna R. Renwick Research Ecologist British Trust for Ornithology, The Nunnery, Thetford, Norfolk, IP24 2PU, UK Tel: +44 (0)1842 750050; Fax: +44 (0)1842 750030 -------------- next part -------------- A non-text attachment was scrubbed... Name: PCA.pdf Type: application/pdf Size: 6580 bytes Desc: not available URL: <https://stat.e...

...convert such strings to corresponding object names within the R workspace itself, so as to give each d.f. a distinct name. The closest I got were various attempts with the as.name function, but couldn't get that to work either. Any help appreciated. Thanks. -- Jim Bouldin, PhD Research Ecologist

...uggestions? Thanks, Tim x<-seq(1,20,2) y<-seq(20,1,-2) xy<-data.frame(x,y) xy<-rbind(xy,c(0,0)) #Threeattempts that fail row.names(xy[11,])<-c("12") rownames(xy[11,])<-c("12") attr(xy[11,], "row.names")<-c("12") ?Tim Clark Marine Ecologist National Park of American Samoa