I agree with everybody too :)
I still like my example, and I obviously respect operator- "in general".
What I can't square is whether the code for operator- (which I may in fact
have defined the way I like it) _actually gets called_.
In what I sent on March 31 as the NewYear/Easter example:
R> NewYear <- as.Date("2013-01-01")
R> Easter <- Sys.Date()
R> cppFunction('double ddiff(Date a, Date b) { return a - b; }')
R> cppFunction('double ddiff2(Date a, Date b) { return b - a; }')
R> ddiff(NewYear, Easter)
[1] 89 ## I find this more logical
R> ddiff2(NewYear, Easter)
[1] -89 ## closer to R's difftime and 'odd' to me
R>
If it isn't used here, where is it actually used?
Dirk
--
Dirk Eddelbuettel | [email protected] | http://dirk.eddelbuettel.com
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