similar to: (no subject)

Displaying 20 results from an estimated 10000 matches similar to: "(no subject)"

2006 Mar 13
2
FW: RE: .First functin
_____ From: Vera, Graciela : Insurance Services (BISCO) Sent: 10 March 2006 14:47 To: 'r-help-request@stat.math.ethz.ch' Subject: RE: .First functin I have not used R for some time. Please accept my apologies if my question has an obvious answer. I am trying to use R. For convenience and due to IT restrictions libraries additional to MASS have been stored in a different directory
2010 Feb 23
1
Longitudinal analysis: contrasting time points
Hi everyone I have the following situation: In a longitudinal study, subjects fill out a questionnaire every year (repeated measurements over time). Also, the subjects are nested within departments. There is an intervention going on over time. The outcome variable is continuous. Now I'd like to analyse two things: 1. Is there a significant change over time? I think this is done by a
2011 Jun 08
1
Autocorrelation in R
Hi, I am trying to learn time series, and I am attending a colleague's course on Econometrics. However, he uses e-views, and I use R. I am trying to reproduce his examples in R, but I am having problems specifying a AR(1) model. Would anyone help me with my code? Thanks in advance! Reproducible code follows: download.file("https://sites.google.com/a/proxima.adm.br/main/ex_32.csv
2006 Jun 01
1
help with syntax of nlme function
I am having difficulty understanding the syntax of the nlme() function for nonlinear mixed models. The data frame is called Marouane.chlorophyll. The model involves a dependent variable (Absorb) and an independent variable (Ch.surf), which are both numeric variables in the data frame. The data are hierarchically grouped as Espece, Plante nested within Espece, and Feuille nested within Plante
2006 Mar 13
0
FW: RE: .First functin
_____ From: Vera, Graciela : Insurance Services (BISCO) Sent: 10 March 2006 14:47 To: 'r-help-request@stat.math.ethz.ch' Subject: RE: .First functin I have not used R for some time. Please accept my apologies if my question has an obvious answer. I am trying to use R. For convenience and due to IT restrictions libraries additional to MASS have been stored in a different directory
2012 May 21
1
fda modeling
Dear friends - We have 25 rats, 14 of these subjected to partial removal of kidney tissue, 11 to sham operation, and then followed for 6 weeks. So far we have data on 26 urine metabolites measured by NMR 7 times during the observation. I have smoothed the measurements by b.splines in fda including a roughness penalty, and inspecting the mean curves for nephrectomized and sham animals indicate
2007 May 11
3
A simple question regarding plot of nls objects
Hi, I was trying to run the example of Indomethacin kinetics from the book: ## From Pinheiro/Bates, Mixed-Effects-Models in S and S-Plus, ## Springer, Second Printing 2001, Section 6.2 library(nlme) plot(Indometh) fm1Indom.nls <- nls(conc~SSbiexp(time,A1,lrc1,A2,lrc2), data=Indometh) summary(fm1Indom.nls) plot(fm1Indom.nls,Subject~resid(.),abline=0) ## .... the last plot command gives me the
2001 Jan 08
2
S Programming Book at Amazon.com
As of a moment ago (9 a.m., Monday, Jan. 8, 2001), the S Programming book by Venables and Ripley was once again selling for 17.98 American dollars at Amazon.com. Alas, I notice that "Mixed Effects Models in S and S-Plus" by Pinheiro and Bates now lists at Amazon for 97.25 American dollars, as opposed to about $70 a little while ago.
2012 Jun 06
2
Main effects and interactions in mixed linear models
Dear all, This question may be too basic quesition for this list, but if someone has time to answer I will be happy. I have tried to find out, but haven't found a consice answer. As an example I use "Pinheiro, J. C. & Bates, D. M. 2000. Mixed-effects models in S and S-PLUS. Springer, New York." page 225, where rats are fed by 3 different diets over time, which body mass has
2005 Oct 18
1
AR(1) with NLME
I am trying to calibrate a non linear mixed model with a AR(1) autocorrelation structure. This structure is indicated by the ACF plot. When calibrating the model without the AR(1), everything comes out nicely. However, when the AR(1) structure is included in the model, the Phi parameter estimate comes out to be 1. This result occurs with various starting values in the correlation statement. Am I
2006 Aug 10
5
Variance Components in R
Hi, I'm trying to fit a model using variance components in R, but if very new on it, so I'm asking for your help. I have imported the SPSS database onto R, but I don't know how to convert the commands... the SPSS commands I'm trying to convert are: VARCOMP RATING BY CHAIN SECTOR RESP ASPECT ITEM /RANDOM = CHAIN SECTOR RESP ASPECT ITEM /METHOD = MINQUE (1) /DESIGN
2011 Oct 06
1
Sweave and bibliographies
I added a bibliographic reference to one of my .Rnw documents, to wit: \begin{thebibliography}{9} \bibitem{Jose} Jos{\'{e}} C. Pinheiro and Douglas M. Bates, \emph{Mixed-Effects Models in S and S-PLUS}, Springer, 2000. \end{thebibliography} just before the \end{document}. When I run Sweave on the result these lines disappear without a trace. Is this intentional? Subquestion: is
2006 May 16
5
Interrater and intrarater variability (intraclass correlation coefficients)
Hello! I want to calculate the intra- and interrater reliability of my study. The design is very simple, 5 raters rated a diagnostic score 3 times for 19 patients. Are there methods/funtions in R? I only found packages to calculate interrater variability and intraclass correlation coefficients for matrices of n*m (n subjects, m raters) - I have n subjects, m raters and r repetitions. Can
2001 Jun 06
3
HLM-like analysis in R
Greetings- I have some data on which I need to do something like a Hierarchical Linear Model (please bear with me, I'm only learning the technique so I don't know yet if my language is correct). Essentially I'm analyzing data at two levels simultaneously; data are about individuals an organizations of which they are members. Can someone point me toward an appropriate package in R?
2018 Jan 03
3
Community Feedback: Git Repository for R-Devel
UNBIASED FACTS: ? Bugzilla & R-devel Mailing Lists: Remain unchanged: Understood as Ticketing platforms for bug pull requests on the R-devel Git Repository. ? Git Repository Options: A) Github (Cloud with Automated backups from GitHub to CRAN Server): https://github.com B) Gitlab (Selfhosted on CRAN): https://about.gitlab.com C) Phabricator (Selfhosted on CRAN): https://www.phacility.com D)
2017 Jan 21
2
mail-trends+Dovecot
Hi, Out of curiosity, has anyone managed to use mail-trends[0] to analyse their e-mails. I thought about trying it out, but got stuck midstream. The mail-trends scripts work very well with gmail, but because they say it is supposed to work with _any_ IMAP server, I thought I could get it running with Dovecot too. I know this is NOT a mail-trends support group though, but I believe there is
2009 Apr 11
1
Error in R CMD check 2.8.1
Env: R 2.8.1, Win Xp, Eclipse/StatET In a .Rd file, I have an example containing the lines: # calculate Y M, using polynomial contrasts trends <- as.matrix(VocabGrowth) %*% poly(8:11, degree=3) colnames(trends)<- c("Linear", "Quad", "Cubic") [At the risk of a long message, I'll append the complete .Rd file at the end of this message, in case this was
2003 Aug 25
2
Book recommendations: Multilevel & longitudinal analysis
Hi, does anyone out there have a recommendation for multilevel / random effects and longitudinal analysis? My dream book would be something that's both accessible to a non-statistician but rigorous (because I seem to be slowly turning into a statistician) and ideally would use R. Peter
2004 Jun 01
2
Problem in random (lme)
In a lattice 11x11 with 6 repetitions, we want to compare lines to their two parents. 3 of the 6 repetitions are sprinkled and the 3 others not. There are 5 factors : hm (hydrous mode), variety, block, rep and grandrep. grandrep gathers two repetition, a sprinkled and a not (as in Split Plot !). I use lme but I have problems in random. Can someone help me ? Ibnou DIENG
2008 Feb 10
2
[OT] good reference for mixed models and EM algorithm
Dear R People: Sorry for the off-topic. Could someone recommend a good reference for using the EM algorithm on mixed models, please? I've been looking and there are so many of them. Perhaps someone here can narrow things down a bit. Thanks in advance, Sincerely, Erin -- Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown