[R] na.rm in sd()

[Heberto Ghezzo]

Hello, I think this qualify as a bug
 > x<-c(1,2,3,4,NA,6,7)
 > mean(x)
[1] NA
 > mean(x,na.rm=T)
[1] 3.833333
 > sd(x)
Error in var(as.vector(x)) : missing observations in cov/cor
 > sd(x,na.rm=T)
Error in sd(x, na.rm = T) : unused argument(s) (na.rm ...)
 > var(x)
Error in var(x) : missing observations in cov/cor
 > var(x,na.rm=T)
[1] 5.366667
 >
why sd() does not recognize the na.rm=T parameter, while var does?

R 1.6.1 on Win98

R.Heberto Ghezzo Ph.D.
Meakins-Christie Labs
McGill University
Montreal - Canada