similar to: adding column to a matrix

hie l would like to create a 6th column "actual surv time" from the following data the condition being if censoringTime>survivaltime then actual survtime =survival time else actual survtime =censoring time the code l used to create the data is s=2 while(s!=0){ n=20 m<-matrix(nrow=n,ncol=4)

i would like to add a variable to an existing matrix by manipulating 2 previous variables eg for the data m treat strata censti survTime [1,] 1 2 284.684074 690.4961005 [2,] 1 1 172.764515 32.3990335 [3,] 1 1 2393.195400 24.6145279 [4,] 2 1 30.364771 8.0272267 [5,] 1 1 523.182282 554.7659501 l

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hie how do you compute the logrank test using R what commands do you use my data looks something like just an example treatmentgrp strata censoringTime survivalTime censoring act.surv.time [1,] 2 2 42.89005 1847.3358 1 42.89005 [2,] 1 1 74.40379 440.3467 1 74.40379 [3,] 2 2

l used the following code to generate a sample and then calculated then did a log rank test.can l get the normal version of the logrank eg sqrt of the chisqr(1) will give you the N~(0,1). from my sample can i use the above expression to get the normal dist from the result of the log rank test. thank s=1 while(s!=0){ n=100 m<-matrix(nrow=n,ncol=4)

hie R users l have the following matrix n=20 m<-matrix(nrow=n,ncol=4) colnames(m)=c("treatmentgrp","strata","survivalTime") for(i in 1:n) m[i,]<-c(sample(c(1,2),1,replace=TRUE),sample(c(1:2),1,replace=TRUE),rexp(1,0.07),rexp(1,0.02))

l would like to create the following matrice treatmentgrp strata 1 1 1 1 1 1 1 2 1 2 1 2 2 1 2 1 2 1 2 2 2 2 2 2 l should be able to choose the size of the treatment grps and stratas the method l used intially creates the

Hello I am running a program from value intervals for a set of variables. I thought I could use Smolyak to get my intervals adding points as I need them , so instead of running the program for a whole interval I would run only for the most important points. I am new to Smolyak algorithm though, and I can not understand how can i use smolyak.quad(d,k), to solve my problem. Anybody can give me

Hi, as windbind is not supported on FreeBSD I hope to get some hints how to solve the following issues: I want to setup a samba (2.2.2) fileserver that just contains the home-directories for all users of a Win-NT 4.0 Domain. - How can I use the PDC for authentication instead of smbpasswd? - I am looking for an easy way to auto-genarate a home-dir each time a new Domain-user is created via the

Hello I would like to simulate datasets in the following way: x <- rpois(999, 2000) y <- sum(exp(rgamma(x, scale=2, shape=0.5))) The problem is, that by calling "y" I just get 1 value back and not 999 values. Can anyone help me? Thanks! Brigitte [[alternative HTML version deleted]]

I''ve just put it out; hopefully the packagers will get it in place soon. Here''s the changelog: Execs now autorequire the user they run as, as long as the user is specified by name. (#430) Files on the local machine but not on the remote server during a source copy are now purged if purge => true. (#594) Providers can now specify that some

Hello All. As promised, here is what I needed to do to get the regression tests to work on AIX & HPUX. It goes into a bit of detail in the hope that others might be able to get them running on their platforms. I've run these mods on AIX 4.3.3, HP-UX 11.00, Solaris 8, Redhat 7.3 and OpenBSD 3.0. The problems I encountered: * prereqs (pmake, md5sum) * bad directory owner/mode causing auth