Hi,
Mark Taper, Subhash Lele, and I organized an ESA invited session around
this topic
at the 98? ESA meeting in Baltimore MD. Which resulted in
Mark L. Taper and Subhash R. Lele (eds): The Nature of Scientific
Evidence: Statistical, Philosophical, and Empirical Considerations
University of Chic
Hello Roy,
> Could anyone shed any information on why the area of home ranges as
> estimated in adehabitat can be several times higher when the kernelUD \
> kernel.area functions are used compared to estimates from the mcp
> function. I would have expected them to be roughly the same, rather
> th
Hello,
I would like to post a message, but I was wondering if I had to subscribe first?
Here is my message:
II performed over the seanson a census of butterflies on 8 sites . I have for
each date un number of individuals and of species. I would like to know which
function I could use to test if s
Hi,
Just to add a note to the good advice you have gotten so far. Redundancy
Aanalysis (RA) is a linear
method, as Jari explained. If you apply transformations until your data
conform to the assumptions of RA and then do RA, you are no longer
applying a linear method.
You will get back a configura
Hi Manuel,
I am guessing the problem is that because you have categorical
predictors,
you are getting empty cells in your cross validation sets, and hence
infinite coefficients.
Unfortunately, you are now in a very tricky situation, to get at the
generalization error of your
model you need to have
Dear Chris, Dear Edzer,
in mgcv you can include a correlation structure like
correlation=corExp(form=~X+Y) as corGaus works too (you have to use the gamm
function). I have compared for several data sets the performance of kirgging
and gam and so far I hav't found
significant differences between
Hi,
This is a question from an R-newby!
I’ve got a very extensive data set and will need to run a large number of
Mann-Whitney U tests (in R: wilcox.test) between several sets of data. I am
trying to automate this as far as possible so I won’t need to run each test one
by one. I asked already s
hi all groups
in calculate correlation ,i received this message:
> cor.test(depth,abundance,method="spearman")
Spearman's rank correlation rho
data: depth and abundance
S = 76554.61, p-value = 0.03969
alternative hypothesis: true rho is not equal to 0
sample estimates:
rho
0
Dear R-sig-ecology group,
Â
I have a question about trend surface analysis TSA Â and the way to simplify
polynomials.
I searched in literature but could not find any clear indication.
Assuming a trend surface based on a polynomial of 2nd order like this:
Model A:  Z ~  β0 +  β1 x  + Â
http://www.happytripper.com/blog/wp-content/themes/bwdec/body.html
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Dear List,
I have a problem with the ezANOVA package using for rm ANOVA or a problem with
my statistic design of the experiment. (or both ;-))
My file looks like this (is also attached):
sample daystreatments repl. dispersal gbiov/rich/evenness
1-367,14,21 synchron
http://sitedown.fr/wp-content/uploads/fgallery/otwla.html
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Thank you for these explanations. If I put strata=site, this means that for
each site my dissimilarity matrix of year 1 and year 2 will be permuted and the
observed
changes compared to these random permutation? Adding site as a fixed factor
then ensure that I am testing changes in time site by
Hello.
I used chclust() in package "rioja" for constrained cluster , it sounds like
the function bstick() can help me confirm the number of clusters. However ,
even after read the documents I'm still puzzled , let's make it easy, I wonder
whether it's the points near the two lines converged.
Tha
Dear All
I get following error in some of my datasets while using VGAM package.
Error in backsolve(Rmat, rinv) :
singular matrix in 'backsolve'. First zero in diagonal [1057]
Kindly advise how to tackle this error.
My formula reads like this: vgam(cbind(list of species)~s()+s(),
binomialff(mu
Dear viewers
I get following error while I import "caret " package into RStudio. I have
imported all required packages beforehand I try this. I have tried the
following two options also, but failed to import the "caret" package:
install.packages("caret", repos=c("http://rstudio.org/_packages";, "
--
Beniamino Caputo, PhD
Parasitology Unit
Department of Public Health & Infectious Diseases
Università di Roma "La Sapienza"
Piazzale Aldo Moro, 5
00185 Rome, Italy
Tel. +39 06 4991 4558
Fax. +39 06 4991 4653
E-mail: beniamino.cap...@uniroma1.it
--
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IN
Dear All
I have used following codes for installing 'caret' package in r
install.packages("C:/Users/RMP/Downloads/caret_6.0-71.zip",repos = NULL,
type="source")
install.packages("caret", dependencies = TRUE)
I get following message:
package ‘caret’ successfully unpacked and MD5 sums checked
Th
Nobody answer me when I ask something, but I always answer your question.
Could u please take off my name of this email?
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Dear All,
Thanks for your continuous support and guidance through this forum. This
time, I have a query regarding errors in 'nlsem' package, which reads as
follows:
Error in if (abs(ll.old - ll.new) < convergence) run <- FALSE :
missing value where TRUE/FALSE needed
This errors comes after us
Hi all,
As I use ggplot2 for all my graphs, I would like to use ggplot2 to
construct rarefaction curves as well (I also want to combine 2 rarefaction
curves in 1 plot using cowplot which also vows for using ggplot2).
I made these rarefaction curves using the rarecurve function in vegan, but
I don
Dear members greetings!!!
I've been struggling with vegan ordination diagram.
I've made NMDS sample plot with variable sized bubbles as species abundance
score. I want to vector fit via envfit environmental variables of both
categorical as well as quantitative environmental variables on that bubble
Hi, I am Omar Maghawry Ibrahim. I am a professor of crop science at SRTA
City, Egypt. I developed a new method to compute relative importance of
inputs in neural networks. I wrote a code in visual basic for this method
and I published it in a paper in 2013. It produces more accurate results
than O
ONLINE COURSE – Missing Data Analytics (MDAR01) This course will be
delivered live
https://www.prstatistics.com/course/online-course-missing-data-analytics-mdar01
8 September 2021 - 10 September 2021
TIME ZONE – Western European Time – however all sessions will be
recorded and made available all
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On 01/28/2011 09:18 AM, Sven Adler (2) wrote:
> "I never
> understood why people would test for spatial autocorrelation, as
> non-significant autocorrelation will only indicate that the sample size
> is small."
>
> Maby it is here the wrong place (r-sig-geo) but it is an important question
>
On Mon, 2011-10-17 at 15:33 +0200, Kerstin Kober wrote:
> Hi,
> This is a question from an R-newby!
> I’ve got a very extensive data set and will need to run a large number of
> Mann-Whitney U tests (in R: wilcox.test) between several sets of data. I am
> trying to automate this as far as possib
Hi Nils,
Please use dput() to provide your data, and include the actual code
and error messages. I assume you actually mean the ez package? It's
important to provide a full explanation of the problem so that someone
can offer good advice.
Sarah
On Wed, Jun 27, 2012 at 9:56 AM, "Nils Gülzow" wro
Hi Nils,
On Wed, Jun 27, 2012 at 10:16 AM, Nils Gülzow wrote:
> hey Sarah,
>
> thanks for your good advice, I will add the information (actual code and
> error message) but I didn´t get what you mean with
> dput(), so how can I make my data available for the list?
> Sorry I am Nooby here ;-)
Ple
Your model is probabily too complex for your data. try to simplify the
model (or get more data).
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderl
Thanks a lot for your prompt reply. Some clues provided by you may work.
Let me see.
Best Regards
Rajendra M Panda
School of Water Resources
Indian Institute of Technology Kharagpur
On 6 October 2015 at 13:06, Thierry Onkelinx
wrote:
> Your model is probabily too complex for your data. try to
Dear Viewers
I find following error after updating R and reloading caret
Error : Function found when exporting methods from the namespace ‘Matrix’
which is not S4 generic: ‘as.vector’
In addition: Warning message:
package ‘caret’ was built under R version 3.3.0
Error: package or namespace load fa
Thanks a lot to forum members
Please find the error with Matrix package
Installed Matrix package could not be imported to R even after R update and
caret package reloading. I get following error:
Warning in install.packages :
cannot open compressed file 'Matrix_1.2-5 (3)/DESCRIPTION', probable r
Dear All
I could solve my problem by reinstalling latest version of R .
Best Regards
Rajendra M Panda
School of Water Resources
Indian Institute of Technology Kharagpur
On 18 August 2016 at 14:00, Rajendra Mohan Panda
wrote:
> Dear All
>
> I have used following codes for installing 'caret' pa
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If you are having trouble getting help on this list, though, you might
benefit from taking a look at the general R-help list information,
including the general
Hello Omar,
This doesn't seem particularly ecology-related, but I'll give you the
same answer you're likely to get on any other list.
R is Open Source, and has a vibrant user community. That means that
the best way for you to have your code incorporated into R is to write
a package, and contribut
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