Search Archives
Search tips
from:Name
Search by author name, e.g. from:Duncan Murdoch
"exact phrase"
Match an exact phrase
word1 word2
Match messages containing both words
Date range
Use the date pickers to filter results to a time period
Use the list dropdown to narrow results to a specific mailing list. Combine from: with other terms to filter by author and content.
I have the following code. > f <- cph(formula = Surv(TimeToDeath, Dead == "Yes") ~1,data=single.dat, x=T, y=T, surv=T) > for(i in c('A', 'B', 'C', 'D', 'E', 'F')){ > f <-update(f,as.formula(paste('Surv(TimeToDeath...
Dr. Harrell, Thanks for you help. I tried: >print(summary(f,parse(text=paste(i,'="1st Quartile"', sep='')))) Same result. No error, the reference category simply doesn't change. Brian -----Original Message----- From: Frank E Harrell Jr [mailto:f.harrell...
Frank, Thanks again, I didn't realize that continuous variables could be manipulated that way inside of the summary function. I realize that my code was kind of confusing. The variables "A"..."F" are all categorical variables. They each have...
Can't find what you're looking for? Try searching with Google .