On Wed, 24 Mar 2010, Duncan Murdoch wrote:

On 23/03/2010 1:28 PM, Bond, Stephen wrote:
Dear R developers,

Could you, please, point me to the source file containing the implementation of NA values?


I have a feeling this isn't what you want, but what you asked for is in

https://svn.r-project.org/R/trunk/src/main/arithmetic.c

in particular around lines 110 and 160.

And for completeness, lines 1106-8 of names.c (there are 4 types of NA in R, and NA_character_ is in a different file).

--
Brian D. Ripley,                  rip...@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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