[Rd] variance of a scalar (PR#546)

[Peter Dalgaard BSA]

J.C.Rougier@durham.ac.uk writes:

> I was surprised to find that the variance of a scalar, using
> var(), is NA.  Surely this should be zero?

I don't think so. There's a divide by zero involved.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907
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