search for: biau

Dear all, I have a dataframe of names (netw), with each cell including last name and initials of an author; some cells have NA. I would like to extract only the last name from each cell; this new dataframe is calle 'res' Here is what I do: res <- data.frame(matrix(NA, nrow=dim(netw)[1], ncol=dim(netw)[2])) for (i in 1:x) { wh <- regexpr('[a-z]{3,}',

...h (Design). I have modeled a predictor which showed non linear effect with restricted cubic splines. I would like to retrieve the se(coef) for other, linear, predictors. This is just to make nice LateX tables automatically. I have the coefficients with coef(). How do I do that? Thanks, David Biau. [[alternative HTML version deleted]]

...roject.org > >You can reach the person managing the list at > r-sig-debian-owner@r-project.org > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of R-SIG-Debian digest..." > > >Today's Topics: > > 1. set.seed (Biau David) > 2. Re: set.seed (Dirk Eddelbuettel) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Sat, 26 Mar 2011 00:30:32 +0000 (GMT) >From: Biau David <djmbiau@yahoo.fr> >To: R-debian <r-sig-debian@r-project.org&gt...

...e(s) into ‘/usr/local/lib/R/site-library’ (as ‘lib’ is unspecified) --- Please select a CRAN mirror for use in this session --- Loading Tcl/Tk interface ... done Warning message: package ‘Design’ is not available (for R version 2.15.2) Any idea why and how to sort the problem? Thanks,   David Biau [[alternative HTML version deleted]]

...me/david/R_home/library/DiagnosisMed’ ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ I have intalled packages - tcl - tcl8.4 - tk - tk8.4 1) I haven't figured out how to install the tcl/tk package. 2) is there a search option for the r-sig-archives; I couldn't find it. Thanks for the help, David Biau. [[alternative HTML version deleted]]

Dear All, I have a data frame of vectors of publication names such as 'pub': pub1 <- c('Brown DK, Santos R, Rome DF, Don Juan X') pub2 <- c('Benigni D') pub3 <- c('Arstra SD, Van den Hoops DD, lamarque D') pub <- rbind(pub1, pub2, pub3) I would like to construct a dataframe with only author's last name and each last name in columns and the

...at the effect of age decreases from model 1 to 3. I would like to compare the effect of age on the outcome across the different models. A test of \beta_(a1) = \beta_(a2) = \beta_(a3) and then two by two comparisons or a global trend test maybe? Is that possible? Thank you for your help, David Biau. [[alternative HTML version deleted]]

Dear all,   i would like to count the number of times where I have combined occurrences of the categories of 2 variables.   For instance, in the dataframe below, i would like to know how many times each author (au1, au2, au3 represent the first, second, third author) is associated with each of the category of the variable 'nam'. The position of the author does not matter.   nam <-

Thanks for sharing the questions and responses! Is it possible to appreciate how much the coefficients matter in one or the other model? Say, using Biau's example, using coxph, as.factor(grade2 == "high")TRUE gives hazard ratio 1.27 (rounded). As clinician I can grasp this HR as 27% relative increase. I can relate with other published results. With survreg the Weibull model gives a coefficient -0.4035245: is it feasible or meaningful...

...Collett (h_0(t)=\lambda*\gamma*t^{\gamma-1}), I am concerned that this coefficient intercept changes depending on the reference level of the factor entered in the model. The change is very important when I have more than one predictor in the model. Any help would be greatly appreciated, David Biau. [[alternative HTML version deleted]]

Hi all, has anyone tried and possibly succeeded in installing "reshape" package on Debian Lenny? I have a permanent failure because i cannot find the "plyr" package. I tried 10 mirrors. I contacted Hadley Wickham and James Long who seemed to have been closed to do it but it didn't work (meaning so far I haven't the answer from them). So has anyone any ideas as how to

Hi all, how do you update R on Debian lenny? I have tried to re-install r-base after adding deb http://<favorite-cran-mirror>/bin/linux/debian lenny-cran/ to my backport lists but it keeps installing R 2.7.1. What should I be doing to get the lattest R release? I need it to install a package (plyr) Thanks, David. [[alternative HTML version deleted]]

...isfied, as there is no lower bound on plyr's versions: you can then use install.packages or what you like). Nota "\" denotes it is on the same line i bash scripting!!! Then, you wait one or two weeks and you get R-2.11.0 if you want. Have nice days. DB --- En date de?: Lun 29.3.10, Biau David <djmbiau at yahoo.fr> a ?crit?: > De: Biau David <djmbiau at yahoo.fr> > Objet: [R-sig-Debian] how to update r to lattest version on debian lenny? > ?: "R-debian" <> > Date: Lundi 29 mars 2010, 13h43 > Hi all, > > how do you update R on Debia...

...135090 0.5959253 0.3580500 > runif(5) [1] 0.42880942 0.05190332 0.26417767 0.39879073 0.83613414 > set.seed(15) > runif(5) [1] 0.6021140 0.1950439 0.9664587 0.6509055 0.3670719 > runif(5) [1] 0.9888592 0.8151934 0.2539684 0.6872308 0.8314290 Any help would be appreciated. Thx, David Biau. [[alternative HTML version deleted]]

...he likelihood ratio and score tests for specific variables in a multivariate coxph model. The default is Wald, so the tests for each separate variable is based on Wald's test. I have the other tests for the full model but I don't know how to get them for each variable. Any idea? David Biau. [[alternative HTML version deleted]]

OK, thanks both. I'll try that. I suspect (very strongly) that it comes from the fact that I did not replace the cran mirror line by an actulal cran mirror URLs... I will give a look at all my backports this weekend and do a little cleaning too! thanks,   David Biau.   ################################# From: Johannes Ranke <jranke@uni-bremen.de> To: r-sig-debian@r-project.org Subject: Re: [R-sig-Debian] Re : Install latest R version from apt on     Lenny Message-ID: <201004191530.15406.jranke@uni-bremen.de> Content-Type: Text/Plain;  charset=&qu...

...Collett (h_0(t)=\lambda*\gamma*t^{\gamma-1}), I am concerned that this coefficient intercept changes depending on the reference level of the factor entered in the model. The change is very important when I have more than one predictor in the model. Any help would be greatly appreciated, David Biau.

Hello, I have a dataframe (var_1, var_2, ..., var_n) and I would like to export summary statistics to Latex in the form of a table. I want specific summary statistics by crossing numerous variables 2x2 AT ONCE. In each cell I would like sometimes to have the median (Q1 - Q3), or frequency and proportion, etc. CrossTable, xtab, etc... do not allow for multiple 2 by 2 crosstabulation. The table

I recently had to re-install R on Debian Lenny. I couldn't install the latest version through apt-get. So i had to compile it manually from the .tar . This link is very useful: http://cran.r-project.org/doc/manuals/R-admin.html Hope this helps,  David Biau. ________________________________ De : "r-sig-debian-request@r-project.org" <r-sig-debian-request@r-project.org> À : r-sig-debian@r-project.org Envoyé le : Mer 14 avril 2010, 6 h 00 min 09 s Objet : R-SIG-Debian Digest, Vol 56, Issue 5 Send R-SIG-Debian mailing list submission...

Dear all, I am working on an author network and to do so I have to arrange a data.frame (tutu) crossing author names (rows) per publication number (column). The participation of the author to a study is indicated by a 1 and 0 otherwise. I have a vector (xaulist) of all the names of authors and a data.frame (tata) with all the publications in row and the authors in columns. I have writen a loop