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Dear R-users, Running R 2.1.1 in WindowsXP, there seems to be a 'bug' in sd() If >x<-c(1,2,3,NA,5) >mean(x) [1] NA But >sd(x) Or >var(x) give Error in var(x, na.rm = na.rm) : missing observations in cov/cor There are obvious work-rounds, like >sd(x, is.na(x)==F) which gives the result (with error message) [1] 1.707825 Warning message: the condition has length > 1

Dear r-help subscribers, A couple of weeks ago I sent the following message to the r-help mail list. It hasn't generated any response, and I could really use some help on this. Anyone able to help? Thanks again, Roger Dungan >> I am working on some survival analysis of some interval censored failure time data in R. I have done similar analysis before using PROC LIFEREG in SAS. In

Dear r-help subscribers, I am working on some survival analysis of some interval censored failure time data in R. I have done similar analysis before using PROC LIFEREG in SAS. In that instance, a gamma survival function was the optimum parametric model for describing the survival and hazard functions. I would like to be able to use a gamma function in R, but apparently the survival package does