R-beta: odd result with sum?

[Richard Lammers]

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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