similar to: [OT] Survival and Function as co-primary endpoints in clinical trials. How to simulate in R ?

Dear All, I get the following error when using either SASxport or Hmisc to read an .xpt file: > w <- read.xport("D:/consult/Trophos/dnp/base/TRO_ds_20081006.xpt") Erreur dans factor(x, f$value, f$label) : invalid labels; length 15 should be 1 or 14 > z<- sasxport.get("D:/consult/Trophos/dnp/base/TRO_ds_20081006.xpt") Erreur dans factor(x, f$value, f$label) :

Dear R-Helpers Has anyone written a script for the dose proportionality assessement using the power model and the confidence interval criteria as described in - Gough at al. Assessment of dose proportionality: report from the statisticians in the pharmaceutical industry in Drug Information Journal,1995, 29:1039-1048 and/or - Smith et al. Confidence interval criteria for assessment of dose

Dear All I would need to generate differences between variates such as nam1<-nam2-nam3 in the following loop: for(i in c("13","26","38")) { for (j in c("HR","PQ","QRS","QT")){ nam1<-paste("d",j,i,sep="") nam2<-paste(j,i,sep=".")

Dear All, I am looking an R version of the "Computer program for sample size and power calculations in the design of multi-arm and factorial clinical trials with survival endpoints". Best regards, Giovanni Parrinello P.S.: in the meantime I am preparing a summary for my preceeding question about time-varying covariates in the Cox model and I thank Frank Harrell, Chuck Cleland,

I used both BMDP and SAS in my earlier years, side by side. At that time the BMDP statistical methods were much more mature and comprehensive: we treated them as the standard when the two packages disagreed. (It was a BMDP manual that clearly explained to me what the hypothesis of "Yate's weighted mean test" is, something SAS decided to call "type III" and eternally

Hi, I’m new to R (just installed today) and I’m trying to figure out how to do stratified randomisation using it. My google search expedition has lead me to believe that blockrand package will most probably be the answer to it. I’ve played around with blockrand for awhile and tried the sample code: library(blockrand) ##stratified by sex male <- blockrand(n=100,

Hi, Just a short question : Is it possible to NOT have the profiles directory used for the roaming profiles shares ([profiles]) in unix mode 777 ? Because it is a bit annoying when unix users have access to the samba server providing a 777 space ? Thanks in advance, -- G?rard MILHAUD ?cole Sup?rieure d'Ing?nieurs de Luminy (ESIL) Luminy - Case 925 - 13288 Marseille Cedex 09 T?l.: 04

Dear all, I am a public resaerch engineer in marseille (France) and I am currently developping a free software for high throughput experiments in biology using mainly R (bioconductor). This project is almost at a finalisation stage and I would like to build an installshield using innosetup for the windows version of my software. The ideal case would be to also include the required 2.6

I hope that Marc doesn't mind, but I felt that part of his recent post was important enough to deserve it's own subject line rather then being lost in a 60-msg-long thread... On Sun, Jan 11, 2009 at 10:08 AM, Marc Schwartz <marc_schwartz at comcast.net> wrote: ... I strongly believe that the comments regarding R and the FDA are overly negative and pessimistic. The hurdles to

Hello Everyone,   I’m a SAS user who has recently become interested in sequential clinical trials designs. I’ve discovered that the SAS based approaches for these designs are either too costly or are “experimental.” So now I’m looking for alternative software. Two programs that seem promising are SPLUS Seqtrial and R.   I recently obtained a 30 day trial for the SPLUS Seqtrial add-on and have

hello to all i use a samba server (3.0.14a) PDC which makes the users and computers authentication on a LDAP server (openldap on debian sarge) (people branch and computers branch).. does somebody had this problem? when a user connects from a PC which is in a windows domain, the authentication doesn't succeed for the following reason the error message is (translated from french message

OK, It works if I modify my make.conf to not build openss[lh] like it : #MAKE_KERBEROS5= yes # TEST NO_OPENSSH= true # do not build OpenSSH NO_OPENSSL= true # do not build OpenSSL (implies NO_OPENSSH) Maybe I install openss[hl] as ports after... But I'm not satisfied with this way... -- G?rard MILHAUD ?cole Sup?rieure d'Ing?nieurs de Luminy (ESIL) Luminy - Case 925 -

Hi, I can't build the world. I have an error in SSL, with today cvs sources. Here is the error : /usr/src/secure/lib/libssl/../../../crypto/openssl/ssl/bio_ssl.c: In function `ssl_read': /usr/src/secure/lib/libssl/../../../crypto/openssl/ssl/bio_ssl.c:209: `SSL_ERROR_WANT_ACCEPT' undeclared (first use in this function)

Hi, * I am using read.table command as follow kegg<-read.table("c:/IDs.tab",header =TRUE,quote= "'", sep="\t") * Fragment of file is as follow: ID Pathway 04916 Melanogenesis 04920 Adipocytokine signaling pathway 04930 Type II diabetes mellitus 04940 Type I diabetes mellitus 04950 Maturity onset diabetes of the young 05010

Dear R experts How can you perform a regression analysis in R when the dependent variable is countiuous but bounded, say between 0 and 100? I would be grateful for pointers to R-functions but also for hints to relavant litterature since I have never worked with this problem before. Thanks in advance. Kim Mouridsen. [[alternative HTML version deleted]]

LinkedIn ------------ James Matthews requested to add you as a connection on LinkedIn: ------------------------------------------ Romeo, I'd like to add you to my professional network on LinkedIn. - James Matthews Accept invitation from James Matthews

Dear all, There have been a variety of discussions on the R list regarding the use of R in clinical trials. The following post from the STATA list provides an interesting opinion regarding why SAS remains so popular in this arena: http://www.stata.com/statalist/archive/2008-01/msg00098.html Regards, -Cody Hamilton

On Sun, Mar 29, 2009 at 3:33 PM, Benoit Boissinot <bboissin+llvm at gmail.com> wrote: > While it is not described in the litterature, I don't think you need > to introduce a new > function: >      x0 = ... >  x1, x2 = \sigma (x0) >         | >    +----+------+ >    |           | >    v           v >  ... = x1    ... = x2 > > Can be transformed to: >

How can I make a reference i this case? I want to make a reference to 'Artikel XXX' For example In The Artikel 'XXXX' there is two tables. .. Litterature Artikel XXX -- View this message in context: http://r.789695.n4.nabble.com/Make-a-reference-tp4634611.html Sent from the R help mailing list archive at Nabble.com.

Is anybody using R to do analysis of clinical trial datasets that have been put in the public domain (which are super hard to find). Not only a single data table, but the actual database, with a handful of data tables with one-to-one or many-to-one relationships? [ For example, "Adverse Events" and "Patient Info" are two datasets with a many-to-one relationship, the