R help - Aug 1997 - R-beta: odd result with sum?

I am using R 0.49 and I did not see this in the archives:

Given sum() defaults to na.rm = FALSE, should both of these results be NA?
> sum(c(1,NA))
[1] NA
> sum(c(NA,1))
[1] 0


--

Richard Lammers                  Phone: (603) 862-4699
Complex System Research Center     Fax: (603) 862-0188
University of New Hampshire      email: Richard.Lammers at unh.edu
Durham, NH  03824 (USA)            URL: http://pyramid.sr.unh.edu/~lammers


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>>>>> "RL" == Richard Lammers <lammers at
edac.sr.unh.edu> writes:
    RL> I am using R 0.49 and I did not see this in the archives:

It was a bug; and it has been corrected a while.
Unfortunately, there hasn't been a new beta release of R in the mean time.

    RL> Given sum() defaults to na.rm = FALSE, should both of these results
    RL> be NA?

    > sum(c(1,NA))
    RL> [1] NA
    > sum(c(NA,1))
    RL> [1] 0

This is the current [0.50-a3 "alpha"]  (and desired) behavior :
> sum(c(1,NA)); sum(c(NA,1))
[1] NA
[1] NA
> sum(c(1,NA), na.rm=TRUE); sum(c(NA,1),na.rm=TRUE)
[1] 1
[1] 1
> 
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