similar to: covariance matrix of the regression coefficients

Greetings R Help Group, How does one effect a multiphasic logistic growth model with 4 phases (e.g. Koops 1986; Weigel, Craig, Bidwell and Bates 1992; Grossman and Koops 2003) with R. Before writing to the group, the R help archives were searched, the web was searched with Google, Venables and Ripley 2002 was consulted, Pinheiro and Bates 2000 was consulted, Bates and Watts 2007 was bought and

I have a vector Pes with 600 elements some of which are NA's. How can I form a vector of the indices of the NA's. for(i in 1:600) if(is.na(Pes[i])) print(i) prints the indices of the NA's but I can't figure out how to put the results in a vector. Thank you very much. Peter B. -- Peter B. Mandeville mandevip at deimos.tc.uaslp.mx Jefe del Depto. de

Kjetil Halvorsen mentioned a book call "S-Poetry in R". I checked with amazon.com and Barnes and Noble but they don't have it listed. Can somebody please give me the complete reference and where it can be obtained. Suggestion: Might it be possible to put a list of the most important and new literature about R, S, and S+ which has a direct bearing on R in the Documentation section

Happy New Year to all, I am using RW0631 and WIN98. 1. The command DATA only works for the base library. 2. The following code on page 312 of Venables and Ripley 1997 sitka.lme <- lme(size~treat*ordered(Time),random=~1,cluster=~tree,data=Sitka, serial.structure="ar1.continuous",serial.covariate=~Time) produced the following error message Error in lme(size ~ treat *

Version: platform = sparc-sun-solaris2.6 arch = sparc os = solaris2.6 system = sparc, solaris2.6 status = status.rev = 0 major = 0 minor = 64.2 year = 1999 month = July day = 3 language = R -- It is unclear to me that the handling of NAs is desirable, and it has problems with names: > z <- c(T,T,NA,F,T) > names(z) <- letters[1:5] > which(z) Error: names attribute

Full_Name: Joann Williamson Version: 1.9.0 OS: Windows XP Submission from: (NULL) (129.252.198.28) I installed R project 1.9.0 on Windows XP. The installation went well. Then, I rebooted. Next, I clicked the icon under Programs in the Start menu and received this error, "Fatal Error: Invalid HOMEDRIVE". I clicked OK to the error message. The program does not start. I went to a DOS

Among other computers, I am using rw0642 on an IBM 300GL with 32MB RAM and Windows98. 1. If after opening rw0642 the first command is to help such as "? par", when the help window is closed by clicking X in the upper right corner of the help window the following message is shown This program has performed an illegal operation and will be shut down. If the problem persists contact the

I would like to to know about conversion from jpg file to lss format. I used ppmtolss16. It is giving following errors. for .jpg file: ppmtolss16: stdin is not a raw PPM file at ppmtolss16 line 105, <STDIN> line 1. for .png files: ppmtolss16: stdin is not a raw PPM file at ppmtolss16 line 105, <STDIN> line 1. from .ppm file: ( I converted .jpg file in to .ppm file using irfanview)

hi, ?m studying moderated effects of percieved social support and justice world belief on relationship between stress coping strategies and depression level. ? haver never run this analysis before soi ? want to check my steps whether correct or not. first ? run regression in step 1 centered independent variables and centered moderators in step2 two way interactions instep 3 three way

I respost the message here since I suppose P. Mandeville is on the list, question is rather general and ----- Forwarded message from MAILER-DAEMON at sirio.stat.unipd.it ----- <mandevip at 148.224.17.2>: Sorry, I couldn't find any host named 148.224.17.2. (#5.1.2) --- Below this line is a copy of the message. On Wed, Dec 16, 1998 at 05:01:02AM +0000, Peter B. Mandeville wrote: > How

Am 03.12.2015 um 11:08 schrieb Greg Lindahl <lindahl at pbm.com>: > I wanted to help you by making sure that you were on the most recent > version, but, looking at the Centos.org website I was unable to figure > out if 7.2 was the tip. 7.1503? Is that 7.2? Beats me. CentOS 7.1511 (aka '7.2') not yet released ... > https://wiki.centos.org/Download appears to say that

Does anyone know how to read a SYSTAT .syd file on Linux? (Splus 6 does it, but it is easier to find a Windows box with Systat than to download their demo. I'm wondering if there is a better way than either of these options.) Jon -- Jonathan Baron, Professor of Psychology, University of Pennsylvania Home page: http://www.sas.upenn.edu/~baron R search page:

Hi folks, I just cvsupped the latest -STABLE source code, and noticed that it doesn't seem to build. Here's what happens: --- root@jasmina> make buildworld -------------------------------------------------------------- >>> Rebuilding the temporary build tree -------------------------------------------------------------- rm -rf /usr/obj/usr/src/i386 mkdir -p

Buenas tardes: Soy Pedro José Martínez, del Departamento de Economía Financiera y Contabilidad de la Universidad de Murcia y tengo una duda sobre R. Mi investigación se basa en calcular la eficiencia de los servicios municipales con DEA (packages deaR), y posteriormente identificar los determinantes de dicho nivel con una regresión truncada (packages truncreg). Para calcular la eficiencia

Dear R Help Members, I am aware how to plot the LD1 vs LD2 from a lda in R, using the code: plot(baseline.systat.hat$x, col=baseline.systat.hat$class,pch=as.numeric(baseline.systat.hat$class)) However, I need to use the quadratic discriminant function, qda due to data properties. Is there a way to obtain the same sort of plot for from a qda object (and the output of predict qda). I have not

Hi everybody, I would like to compute the mean for 1 variable between the rows with the same levels. For example, with the dataset below: Factor1 Factor2 Value A X 1 A X 2 A Y 3 A Y 4 B X 5 B X 6 B Y

Suppose I do a psychology experiment in which each of six subjects does several items in each of five fixed conditions, A, B, C, D, and E. The items are randomized separately for each subject, so I can ignore order. All I want to know is whether the five conditions differ. The data look like this. Each row is a subject, and each number is the score in the given condition. A B C D E 4 1

Hi: Goal: use R to turn a matrix of 1's and 0's into a corresponding image (e.g. png) of black and white pixels. Why R: Yes, I can do this more efficiently and precisely with a perl module like Image::PBM. Been there, done that many times, etc. (Just humor me. I'm trying to do this with R for a number of reasons.) Problem:

Hello R-Users, I have been using (nnet) by Ripley to train a neural net on a test dataset, I have obtained predictions for a validtion dataset using: PP<-predict(nnetobject,validationdata) Using PP I can find the -2 log likelihood for the validation datset. However what I really want to know is how well my nueral net is doing at classifying my binary output variable. I am new to R and I

Full_Name: Jorge A. Tomasevic Version: 1.2.2 OS: Win98 Submission from: (NULL) (146.83.23.177) As i'm not an "R-expert-user", i will describe what i do: i) open Rgui.exe ii) ivoke foreign library : >library(foreign) iii) i try to read an .xpt file (from Systat 9): >datos <- read.xport('ipoisson.xpt') iv) then the program crashes. Norton CrashGuard alerts the